CN2162059Y - Erasing-proof switch for cassette videocorder - Google Patents
Erasing-proof switch for cassette videocorder Download PDFInfo
- Publication number
- CN2162059Y CN2162059Y CN 93223028 CN93223028U CN2162059Y CN 2162059 Y CN2162059 Y CN 2162059Y CN 93223028 CN93223028 CN 93223028 CN 93223028 U CN93223028 U CN 93223028U CN 2162059 Y CN2162059 Y CN 2162059Y
- Authority
- CN
- China
- Prior art keywords
- error
- smearing
- switch
- sheet metal
- elastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a switch which is suitable for switching off elastic reed contacts and preventing original written signals being erased by mistake when a video cassette recorder tape goes into the built-in recording state and works, wherein, an elastic erasing block which can rotate relative to a base is provided with a closed rectangular channel for arranging a plane straight elastic trip; the upper end of the elastic erasing block is provided with a triangular lug boss. The base is provided with a lug boss and a semi-closed rectangular channel for arranging a step-shaped elastic reed. In the operating position of the signal writing state, the triangular lug boss of the elastic erasing block goes into a notch on the bottom of the video tape box, so that the two elastic reeds can reliably break circuits and realize the functional operation of preventing erasing by mistake.
Description
The utility model relates to a kind of video cassette recorder with the anti-error switch of smearing, and this switch is used for video tape recorder in video tape enters machine during the writing task state, prevents that mistake from smearing a kind of switch of original tracer signal.
The utility model is at the anti-error a pair of elastic sheet metal that is parallel to each other of having smeared in the seat reliable plug-in mounting easily, when video tape recorder writing task state, the anti-error elastic cantilever upper end triangle boss of smearing in the switch, enter the bottom notch of video cassette, elastic sheet metal in the switch is disconnected reliably, no signal is conveyed into the central microprocessor of video tape recorder, has realized the purpose that prevents that mistake from smearing the original signal of video tape.
Existing common video cassette recorder is with the anti-error switch of smearing, it is a kind of switch that prevents that the video tape mistake from smearing, it is by the anti-error seat of smearing, sheath, a pair of elastic sheet metal and connecting conducting wire, socket welds and forms, sheath and the anti-error seat of smearing connect with pivot pin, when video tape enters the writing task state, directly promote the elastic sheet metal of the band triangular ramp in sheath and the sheath, triangular ramp enters in the video tape bottom notch, disconnects the sheet metal contact.Because during the tape drum action, the triangular ramp of elastic sheet metal must be once stressed, and infinite place fulcrum in the sheath, practice confirms, elastic sheet metal very easily is out of shape, cause work unreliable, the planform complexity of elastic sheet metal, cost height, one end conducting position tightens up double executing by screw, can cause surface oxidation, electric conductivity changes, and causes poor reliability.
Another square elastic sheet metal be plugged in anti-error smear the seat spacing rectangular aperture groove in, though there is a spacing square hole at the place, middle and lower part at sheet metal, buckle anti-error and smear on the seat in the corresponding square boss, but because behind the sheet metal stress deformation, the upper-lower position of sheet metal can't limit, and causes the contact displacement.Square end, sheet metal bottom is provided with the lead-in wire welding hole, and with wire bonds, the metal jack pressing plug-in mounting in the other end of lead and the socket forms, and it is easily loosening to exist soldering tip in actual the use, the shortcoming of poor reliability, and simultaneously, mounting or dismounting are inconvenience also.
The utility model is exactly to this anti-error a kind of improvement of smearing switch.The utility model is arranged to one with former sheath, the anti-error seat of smearing, and anti-error smear be arranged in the seat resilient, the elasticity that prevents the elastic sheet metal distortion is smeared piece, be provided with sheet metal and the positive stop lug boss and the stopper slot that are used for limiting this sheet metal displacement in the pedestal, simplify the structure, reduce cost, made things convenient for mounting or dismounting, improved reliability.
Embodiment by with reference to the accompanying drawings will be illustrated the utility model, wherein:
Fig. 1 is the anti-error structure cutaway view of smearing bar.
Fig. 2 is the rear elevation view that elasticity is smeared bar.
Fig. 3 is the front view of straightsided shape metal spring leaf.
Fig. 4 is the left side view of straightsided shape metal spring leaf.
Fig. 5 is the front view of step metal spring leaf.
Fig. 6 is the left side view of step metal spring leaf.
Fig. 7 is the anti-error partial sectional view of smearing a positive stop lug boss.
Fig. 8 is the anti-error partial sectional view that an elasticity is hung arm of smearing.
Preferred embodiment of the present utility model is one and is applicable under the video cassette recorder writing task state, prevents a kind of switch that the mistake of the original tracer signal of video tape is smeared.
As shown in Figure 1, the anti-error switch of smearing is smeared piece (2), is faced directly shape elastic sheet metal (3) and step elastic sheet metal (4) is formed by anti-error seat (1), the elasticity of smearing, elasticity is smeared piece (2) cantilever and is smeared on the seat (1) anti-error, the upper end that elasticity is smeared piece (2) is provided with and is used for snapping in the anti-error triangular ramp boss of smearing in the breach hole (5) in video cassette bottom, as shown in Figure 2.Elasticity is smeared the top, the back side and the stage casing of piece (2), be provided with and be used for two enclosed type rectangular notches (6) and (7) of limiting straightsided shape elastic sheet metal (3) and preventing its distortion, anti-error slightly upper of smearing the interior square root (9) of seat (1) is provided with and is used for limiting the rectangle square hole (8) that straightsided shape elastic sheet metal (3) moves down.As Fig. 3, shown in Figure 4, the middle part of straightsided shape elastic sheet metal (3) center of position on the lower side is provided with and is used for latching in the anti-error routine triangular incision platform (10) of smearing the rectangle square hole (8) of seat (1), the both sides of otch platform are provided with restriction straightsided shape elasticity and belong to the limiting stand (11) that sheet (3) moves up, the bottom (13) of the bottom straight flange bar shaped weld tabs (12) of straightsided shape elastic sheet metal (3) is provided with the triangular incision in the weld tabs hole that is used for conveniently being inserted into printed circuit board, in order to soldering, avoided the poor reliability in use brought because of many places soldering tip and lead soldering tip, wire lead drop out and loosening shortcoming have improved the quality of product.
As Fig. 5, shown in Figure 6, step straight flange sheet metal (4) lower end part side is provided with and is used for limiting the pair of notches (14) that this sheet metal (4) moves down, otch platform (14) position, slightly upper is provided with and is used for limiting the step (15) that this sheet metal (4) moves up, the anti-error outer square edge of smearing seat (1) is provided with a pair of semiclosed rectangular channel positive stop lug boss (19) that is used for plug-in mounting step sheet metal (4), see shown in Figure 7, contiguous place, positive stop lug boss (19) top, other is provided with the pair of projections (18) that is used for limiting the step (15) on the step sheet metal (4), after the sheet metal plug-in mounting is gone into pedestal (1), position up and down all is limited, and can not get loose, guaranteed the reliability of switch, made things convenient for mounting or dismounting, simplified the structure.
As shown in Figure 8, the both sides, bottom of pedestal (1) are provided with a pair of lower end that hangs arm (20), elasticity locking extension arm (20) with the anti-error elasticity locking of smearing switch position in the video tape recorder printed circuit board in pintle hook lock location, are arranged to the inclined-plane tapered end (21) of triangle.
The utility model is a kind of video tape recorder with the anti-error switch of smearing, inclined-plane tapered end (21) on this switch base (1), after in the rectangular opening in snapping in printed circuit board, locate with pin (22), inclined-plane tapered end (21) locking, tighten up with screw, be contained in the straightsided shape sheet metal (3) in the pedestal (1) and the triangle bar shaped weld tabs (12) of step sheet metal (4) lower end, (16), inserted in the scolding tin hole in the printed circuit board, with soldering with bar shaped weld tabs (12), (16) end welds in printed circuit board, and the anti-error switch of smearing just can be securely, be fixed on the service position securely.When video tape recorder enters the writing task state, the action of video cassette, promote anti-error elasticity of smearing in the seat (1) and smeared triangular ramp projection (5) action of piece (2) upper end, under the effect of straightsided shape elastic sheet metal (3), triangular ramp projection (5) has snapped in the mistake of video cassette bottom and has smeared in the rectangular opening, two sheet metal contacts disconnect, switch is in open-circuit condition, the anti-error signal of smearing is conveyed into central microprocessor, send the anti-error instruction of smearing, preserved original tracer signal on the videocassette reliably.
Claims (8)
1, a kind of video cassette recorder is with the anti-error switch of smearing, and this switch disconnects the elastic sheet metal contact during writing task state in videocassette enters machine, realize the normal anti-error action of smearing, and this switch comprises:
The elastic sheet metal being arranged to two relative and parallel reeds and can centering on the rotation of spring one end, the anti-error seat of smearing that two elastic sheet metals can be installed is characterized in that: described elastic sheet metal is inserted into anti-error elasticity of smearing seat respectively and smears in piece and the pedestal.
2, the anti-error switch of smearing according to claim 1, it is characterized in that, all be provided with on two elastic sheet metals and be used to limit the otch platform that this sheet metal moves down and be used to limit the limiting stand that this sheet metal moves up, described otch platform and limiting stand are positioned at the bottom of elastic sheet metal.
3, the anti-error switch of smearing according to claim 1, it is characterized in that anti-errorly smear the elasticity that seat is provided with cantilever and smear piece, the top that elasticity is smeared piece is provided with the triangular ramp projection, when being used for videocassette and entering the writing task state, snap in anti-error the smearing in the rectangular opening in tape drum bottom.
4, according to claim 1, the 3 described anti-error switches of smearing is characterized in that the elasticity of cantilever is smeared the top, the back side and the middle-end of piece, are provided with to be used to limit the enclosed shape rectangular channel that straight shape elastic sheet metal laterally moves.
5, the anti-error switch of smearing according to claim 1, it is characterized in that, anti-error smear seat be provided be used to limit the step elastic sheet metal move down semiclosed rectangular channel boss and move up another to boss, the position of described semienclosed slot boss is positioned at the lower end of pedestal, and described another is positioned at the contiguous place, top of semiclosed rectangular channel boss to boss.
6, the anti-error switch of smearing according to claim 1 is characterized in that, the both sides, bottom of pedestal are provided with a pair of Elastic locking fastener that is used to limit around the rotation of switch axis.
7, the anti-error switch of smearing according to claim 6 is characterized in that, the lower end of a pair of Elastic locking fastener is respectively arranged with the triangular ramp step tapered end that is used for this position of the switch of locking positioning.
8, the anti-error switch of smearing according to claim 1 is characterized in that, the lower end of two elastic springs is provided with and is used for the convenient bar shaped weld tabs that inserts the band triangular shape of printed circuit board jack welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93223028 CN2162059Y (en) | 1993-08-26 | 1993-08-26 | Erasing-proof switch for cassette videocorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93223028 CN2162059Y (en) | 1993-08-26 | 1993-08-26 | Erasing-proof switch for cassette videocorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2162059Y true CN2162059Y (en) | 1994-04-13 |
Family
ID=33801461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93223028 Expired - Fee Related CN2162059Y (en) | 1993-08-26 | 1993-08-26 | Erasing-proof switch for cassette videocorder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2162059Y (en) |
-
1993
- 1993-08-26 CN CN 93223028 patent/CN2162059Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |