|Publication number||CN1140873 A|
|Application number||CN 96102582|
|Publication date||22 Jan 1997|
|Filing date||28 Feb 1996|
|Priority date||30 May 1995|
|Publication number||96102582.4, CN 1140873 A, CN 1140873A, CN 96102582, CN-A-1140873, CN1140873 A, CN1140873A, CN96102582, CN96102582.4|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (4), Classifications (3), Legal Events (3)|
|External Links: SIPO, Espacenet|
本发明涉及盒式录象机(“VCR”)，特别涉及在其重查模式期间能防止磁带偏离磁鼓导轨的磁鼓。 The present invention relates to a video cassette recorder ("VCR"), particularly to the retry mode during which the tape can be prevented from departing from the drum guide drum.
众所周知，盒式录象机一般包含有一个柱板组件，它可运动地安装在台板上用于将磁带由磁带盒中引出，并使其与盒式录象机的磁鼓相接触。 As we all know, a video cassette recorder generally comprises a cylinder plate assembly which is movably mounted on the platen for the tape leader from the cassette, and allowed to contact with a video cassette recorder drum. 该柱板组件包括一个导向滚轴用于引导磁带通过磁带路径运行，和一个倾斜柱用于帮助磁带维持一相对磁鼓的适当垂直位置。 The column plate assembly includes a guide roller for guiding the tape running through the tape path, and proper vertical position of a tilt column is used to help maintain a relatively drum tape.
图1表示了现有技术的柱板组件，此时，已从磁带盒(未表示)中抽出的磁带T已被加载在磁鼓组件10上。 Figure 1 shows a prior art column panel assembly, at this time, from the cassette (not shown) in the withdrawn magnetic tape T has been loaded on the head drum assembly 10. 柱板组件设置有一柱板1，一导向滚轴2和一倾斜柱3，其中导向滚轴2还进一步包括一轴盖2a，一垫片2b和一可转动滚轴2c。 Column plate assembly 1 is provided with a plate column, a guide roller 2 and an inclined column 3, wherein the guide rollers 2 and further comprising a shaft cover 2a, 2b and a spacer a rotatable roller 2c. 导向滚轴2与倾斜柱3一起在磁带运行期间引导磁带T沿磁带路径运行，并帮助磁带T维持一相对磁鼓组件10的适当和垂直位置。 Guide rollers 2 and 3 together with the bevel post during tape running guide the magnetic tape T running along the tape path, the tape T and help to maintain a proper and a relative vertical position of the head drum assembly 10.
请参看图2，这里表示了图1中磁鼓组件10的横截面，它包括一根旋转轴11，一个划分成两部分的即旋转磁鼓13和静止磁鼓12，一个法兰15，一个上滚珠轴承16和一个下滚珠轴承16′，一个转子变压器17，一个定子变压器18和一对磁头19。 Referring to Figure 2, there is shown a cross-section in Figure 1 of the head drum assembly 10, which comprises a rotary shaft 11, i.e. a rotary drum is divided into two parts 13 and the stationary drum 12, a flange 15, a the ball bearing 16 and a lower ball bearing 16 ', a rotor transformer 17, a stator transformer 18 and a pair of head 19.
此外，该静止磁鼓14在其周边表面设置有导轨14a用于引导磁带T。 In addition, the stationary drum 14 in its peripheral surface with guide rails 14a for guiding the tape T. 该导轨14a设计成在点“L”(见图9)开始引导磁带，该点位于磁头运行方向距磁带首次与磁鼓12相接触点约10度孤度处。 The rails 14a designed to point "L" (see Figure 9) begins to boot tape, the point is the direction of the head from the tape for the first time with the drum 12 about 10 degrees relative to the contact point of the curvature.
当信息记录/复制在/取出自磁带T时，磁带T在图3所示的箭头A方向运行，沿着导轨14a运动，并和导向滚轴2的盖2a进行接触。 When the information recording / reproducing, the magnetic tape T running in the direction of arrow A shown in Fig. 3 when / removed since the tape T, the movement along the guide rails 14a, and the guide rollers 2 and 2a of the lid contact. 这时，磁头19在图3箭头“B”所示的方向扫描磁带T。 At this time, the magnetic head scanning the magnetic tape 19 in the direction of FIG. 3 arrow "B" shown T.
另一方面，当磁带T在相反方向运动，即如当盒式录象机处于重查模式情况，磁带在图4箭头“C”所示方向运动时，它趋于向下运动(见图5)，从而与导向滚轴2的垫片2b相接触。 On the other hand, when the tape T in the opposite direction, i.e., such as when the cassette recorder is in the retry mode situation, when the tape motion direction of arrow shown in FIG. 4 "C", it tends to be moved downward (see Figure 5 ), whereby the guide rollers in contact with the gasket 2b 2. 在这种情况，磁头19的相应磁迹由图4箭头“D”表示。 In this case, the magnetic head corresponding track 19 is indicated by an arrow in Fig. 4 "D".
但是，当磁带T与垫片2b相接触时，磁带T可能变得不正，如图6A所示的那样偏离导轨14a，或如图6B所示的那样，其底边变得皱折，从而阻止记录在磁带上的信息不能全部被磁头19读出，而这就进而引起如图7所示的在电视监视器上出现一个空白的无图象部分“E”。 However, when the tape T in contact with the spacer 2b, the magnetic tape T may become incorrect, as deviation from the guide rail in FIG. 14a, or as shown in FIG. 6B as shown in 6A, its base becomes wrinkled, thereby preventing information is recorded on the tape can not all be read out of the magnetic head 19, and this in turn causes appears on the television monitor as shown in a non-blank image portion "E" 7 shown in FIG.
因此，本发明的主要目的是提出一种盒式录象机用磁鼓，它在盒式录象机重审模式期间能防止磁带偏离其导轨。 Therefore, a primary object of the present invention is to provide a video cassette recorder with the drum, it retrial mode during cassette recorder tape can be prevented from deviating from the rail.
因此，本发明的一个方面提出一种盒式录象机，它在其中包含一个用于引导磁带沿其运动路径的磁鼓组件，该磁鼓组件包括一个在其底部表面具有一个或多个磁头的旋转磁鼓，和一个在其周边表面设置有导轨的静止磁鼓，其中该导轨在磁头运行方向距磁带首次与磁鼓相接触点在13至17度孤度范围的点处开始引导磁带。 Accordingly, one aspect of the present invention proposes a video cassette recorder, it contains one or a plurality of heads for guiding the magnetic tape along its path of movement of the head drum assembly, the drum assembly comprises a surface having at its bottom rotating drum, and a guide is provided in its stationary drum peripheral surface, wherein the rail in the direction away from the tape head first contact point with the drum in the 13-17 degree range solitary point at the beginning of the boot drive.
本发明上述及其它目的和特性将结合附图，由下述最佳实施例的说明中变得更为清晰，其中：图1是柱板组件和通常的磁鼓组件；图2是图1通常磁鼓组件的横截面图；图3为放象模式时磁带上的磁迹； The present invention The above and other objects and features of the accompanying drawings, become more apparent from the following description of the preferred embodiments, wherein: Figure 1 is the column plate assembly and a conventional head drum assembly; Figure 2 is a generally cross-sectional view of the drum assembly; Figure 3 is the playback mode when the tracks on the tape;
图4为重查模式时磁带上的磁迹；图5描述了重查模式期间磁带在导向滚轴上的运行；图6A和6B相应地显示重查模式期间磁带偏离导轨及其底边变得皱折的情况；图7提供了当磁带偏离导轨时，监视器上放象的情况；图8为柱板组件和在其中包含所发明导轨的磁鼓组件；图9显示了现有导轨和所发明导轨叠加在一起时的比较情况；而图10说明重查模式期间磁带在所发明导轨的情况。 Figure 4 shows the retry mode when the track on the tape; Figure 5 depicts the tape during heavy check pattern on the guide rollers run; 6A and 6B respectively show the tape during the retry mode and bottom rail deviation becomes situation corrugations; Figure 7 provides a guide when the tape is deviated from the case of the playback on the monitor; FIG. 8 is a column in which the plate assembly and the head drum assembly comprising the inventive guide rail; Figure 9 shows the existing rail and the A comparison of the invention superimposed rails together; and Figure 10 illustrates the case of the tape during the retry mode in the inventive guide rail.
请参考图8，这里表示了一个柱板组件和将磁带从磁带盒(未表示)拉出加载后的磁鼓100。 Referring to Figure 8, there is shown a column plate assembly and the magnetic tape from the tape cassette (not shown) is pulled out after loading drum 100.
如图所示，该柱板组件设置有一柱板51，一导向滚轴52和一倾斜柱53。 As shown, the column plate assembly 51 is provided with a plate column, a guide roller 52 and a tilt cylinder 53. 该导向滚轴52与该倾斜柱53一起引导磁带T，并帮助磁带T维持一相对磁鼓组件100的适当的垂直位置。 The guide roller 52 and the inclined guide post 53 together with the tape T, the tape T and help to maintain a proper vertical position relative to the head drum assembly 100. 该磁鼓100分成旋转磁鼓101和静止磁鼓102。 The drum 100 into the rotary drum 101 and the stationary drum 102. 在该旋转磁鼓101的底部表面安装有一个或多个磁头(未表示)；在静止磁鼓102的周边表面设置有一个所发明的导轨103。 In the bottom surface of the rotary drum 101 is equipped with one or a plurality of heads (not shown); the invention is provided with a guide 103 in the peripheral surface of the stationary drum 102.
该所发明的导轨103和现有导轨14a的不同在于，如图9所示，所发明导轨在点“M”开始引导磁带，而现有导轨14a在点“L”开始引导。 The guide 103 different inventive and conventional guide rails 14a is shown in FIG. 9, the invention rails at point "M" start to guide the magnetic tape, and the existing rail 14a at point "L" starts to boot. 点“M”位于磁头运行方向距磁带首次在磁鼓100左侧与磁鼓相接触点的13至17度孤度处。 Point "M" is located in the direction of the head from the left side of the tape for the first time in the drum and the drum 100 contact points 13-17 degrees solitary degrees. 点“M”最好位于磁头运行方向距上述第一个接触点的15度处。 Point "M" is preferably positioned at 15 degrees from the first point of contact in the direction of the head.
通过将导轨开始引导磁带的点“M”放置于磁头运行方向距磁带和磁鼓间，第一个接触点的13至17度弧度处，就可能如图10所示的，在重查模式期间消除磁带偏离其导轨或其底边被皱折的可能。 By the start point of the rail guide tape "M" placed on the head from between the tape and the running direction of the drum, the curvature of 13-17 degrees at the first point of contact, it is possible as shown in Figure 10, during the re-check mode Elimination of the tape away from its bottom side rails or may be wrinkled.
虽然本发明相对最佳实施例来进行表示和说明，但该技术的行家们对此应理解为，只要不离开下述权利要求所确定的本发明的范围，各种变化和修正都是可以的。 Although the preferred embodiment relative to the present invention shown and described, but the technology is to be understood as connoisseurs of this, as long as the scope of the following claims without departing from the present invention as determined, various changes and modifications are possible .
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|22 Jan 1997||C06||Publication|
|17 Jun 1998||C10||Request of examination as to substance|
|30 May 2001||C01||Deemed withdrawal of patent application (patent law 1993)|