CN1022145C - Lid locking device for tape cassette - Google Patents

Abstract

The present invention relates to a lid locking device for a video cassette having upper and lower cases and a lid mounted on the cases for movement between an open position and a closed position. The lid locking device comprises a lid lock having a pivot for mounting the lid lock within the upper and lower cases for pivotal movement between a lid locking position and a lid releasing position. The device further comprises a rounded groove in the upper side of a spring support member of the lid lock, a square projection on the lid lock comprising a convex portion, and a convex portion of the cassette at a point corresponding to the square projection, which is provided with a concave portion.

Description

Lid locking device for tape cassette

The present invention relates to the tape cassete of video tape recorder, be specifically related to the lid locking device of tape cassete.When this tape cassete is inserted into video tape recorder, tape just is arranged in the lid in tape cassete the place ahead owing to breakdown and exposes from tape cassete, therefore the magnetic drum of video tape recorder can contact tape, reproduction is recorded in the Voice ﹠ Video signal on the tape, or with the Voice ﹠ Video signal record to tape; And when tape cassete was ejected video tape recorder, tape then was hidden in the box owing to closing lid.

Tape cassete for tape recorder is equipped with a lid routinely, and lid is installed in the place ahead of the upper and lower casing of tape cassete, in a side of lid, utilizes the lid spring that the lid snap close of locking and release lid is installed.When tape cassete was packed video tape recorder into, the lid snap close was discharged by the snap close released strip of video tape recorder, and lid is because the restoring force of lid spring and by breakdown.When tape cassete At time of eject from video tape recorder, the Hasp lock padlock is decided lid, thereby tape is not exposed.

In order to realize these effects, known lid locking device comprises lid 3 and lid snap close 4, and lid 3 is installed in the place ahead of the upper shell 2 and the lower house 2a of tape cassete 1, and this lid can breakdown and closed; Lid snap close 4 is inserted in the lid snap close insertion groove 7 that forms on the side of the upper shell 2 of tape cassete 1 and lower house 2a.This Hasp lock fastener has spring-loaded part 6, revolution pillar 8 and 8a, square teat 9 and locking protuberance 10.Wherein spring-loaded part 6 is by the warpage part 5a supporting of the lid spring 5 on the inboard spring locking pillar 12 that is installed in lid 3, for formation is held snap close and can insert the space 13(of snap close released strip of video tape recorder not shown), form end protuberance 14 in the outer lower portion of the lid snap close insertion groove 7 of lower house 2a.Utilize lid spring 5 to make above-mentioned lid snap close 4 in place, make the square protuberance 9 that is inserted into lid snap close insertion groove 7 reach end protuberance 14 below.Therefore, when pack into video tape recorder or from At time of eject wherein, lid snap close 4 contacts with lid spring 5 of tape cassete I, thus locking or unclamp lid 3.

Therefore, when the lid locking device of routine is operated, the warpage part 5a of the spring-loaded part 6 of lid snap close 4 and lid spring is in contact with one another, but because the upside of the spring-loaded part 6 of lid snap close 4 remains on horizontality, so the operating of contacts between the meanders 5a of the upside of spring-loaded part and lid spring 5 can not carry out smoothly, therefore can crack and frictional resistance.

At this moment, because crackle and frictional resistance, the locking of lid snap close 4 and unclamp operation can not realize smoothly, therefore may make the breakdown of lid 3 and shutoff operation unreliable.

In addition, the square protuberance 9 that is inserted into the lid snap close 4 in the upper shell 2 of tape cassete 1 and the lid snap close insertion groove 7 on the lower house 2a is shaped as square, is formed in the angle that the drift angle of the end protuberance 14 on the outside of lid snap close insertion groove 7 of lower house 2a has and makes square protuberance 9 reach the outside.Therefore, when the lid 3 of tape cassete 1 was locked, lid snap close 4 rotated, and square protuberance 9 usually snaps on the end protuberance 14 of lower house 2a.Because lid 3 can not reach the locking and the accurate motion of releasing operation,, and, thereby reduced serviceable life because square protuberance 9 and protuberance 14 block mutually and may produce damage and break so the function of tape cassete 1 may degenerate.Next is no matter be that the noise of video tape recorder has increased, because block mutually between square protuberance and end protuberance, bothers very much so the millwright assembles Hasp lock button 4 in the video reproduction operation or the operation of recording a video.

In addition, be inserted into And in the upper shell 2 of tape cassete 1 and the lid snap close insertion groove 7 on the lower house 2a by the locking protuberance 10 of lid snap close 4 that is used to lock and discharges lid spring 5 supportings of lid 3, be locked on the inboard locking protuberance 20 of lid by the elastic force of lid spring 5.In this latched position,, therefore may produce excessive locking owing to lack extra locking braking device.Therefore, when lock-out state discharges the lid 3 of tape cassete 1, because owing to produce excessive locking phenomena, the operation of the locking protuberance 10 of lid snap close 4 can not be carried out smoothly.So the releasing operation of the lid 3 that is in the lock state is not easy to realize.And because the operational motion of the snap close released strip in video tape recorder is inevitable excessive, so the function of video tape recorder has reduced.In addition, when lid spring 5 is inserted in upper and lower shell 2, in the time of between 2a and the lid 3,, be very inconvenient so the millwright assembles lid spring 5 because there is not the extra locking guide piece that is used for fixing lid spring 5.In addition, when assembling lid spring, the lid spring is usually owing to the elasticity of self is thrown off.Therefore, Chang Gui locking device has a lot of shortcomings.

The objective of the invention is to improve the lid locking device of tape cassete, this improved device can be eliminated the shortcoming in the above-mentioned prior art lid locking device.

In order to achieve the above object, claim 1,2,3 content are provided.

Study the following explanation of carrying out with reference to the accompanying drawings, can more know the characteristic that the present invention is real, and other purpose and advantage.In institute's drawings attached, identical Ref. No. is represented identical or similar parts.

Fig. 1 is total skeleton view, and tape cassete of the present invention is shown;

Fig. 2 is a decomposition diagram, and tape cassete of the present invention is shown;

Fig. 3 is the skeleton view of the amplification of substantial portion of the present invention;

Fig. 4 is the skeleton view that amplifies, and the assembled state of substantial portion of the present invention is shown;

Fig. 5 (a) and 5(b) be respectively the enlarged side view of embodiment of the invention substantial portion;

Fig. 6 (a) and 6(b) be respectively the enlarged side view of embodiment of the invention substantial portion;

Fig. 7 (a) and 7(b) be respectively the enlarged side view of embodiment of the invention substantial portion;

Fig. 8 is the decomposition diagram of the substantial portion of the embodiment of the invention;

Fig. 9 (a) is to 9(c) be respectively the sectional view of the substantial portion of the embodiment of the invention;

Figure 10 is a decomposition diagram, and the tape cassete of prior art is shown.

With reference to figure 1,2,3 and 4, use the video package of lid locking device of the present invention shown in the figure, above-mentioned lid locking device comprises lid snap close 104 and lid 103, and the lid snap close is inserted in the insertion groove 107 that forms on the side of two housings 102 of tape cassete 101 and 102Aa; Lid 103 is by lid spring 105 supporting and movably be installed on the housing and can move between breakdown position and off-position.Wherein, be used to lock and the upside of spring support 106 that discharges the lid snap close 104 of lid 103 is shaped as circular groove 115.Contact with circular groove during with releasing operation and be shaped as annular section 105a in locking, thereby make the operating of contacts between lid snap close 104 and the lid spring 105 level and smooth with the end of the lid spring 105 of one biconditional operation.The square protuberance 109 in the bottom of lid snap close 104 is configured in the lid 103, and it is utilize the elasticity of lid spring to be inserted in the lid snap close insertion groove 107 of upper shell 102 and lower house 102a, and outstanding from the end protuberance 114 of the lid snap close insertion groove 107 of lower house 102a with lid 105.The upside of the square protuberance 109 in this bottom is formed convex part 116, forms therewith male portion at the drift angle of the end of lower house 102a protuberance 114 and divides corresponding concave portions 117.Thereby when locking and release lid 103, the end that the square protuberance 109 in the bottom of lid snap close 104 can not snap into lower house 102a goes out in the portion 114.

According to most preferred embodiment of the present invention, the downside that is configured in the lid 103 and is inserted into the spring support 106 of the lid snap close 104 in the lid snap close insertion groove 107 of upper shell 102 and lower house 102a in company with lid spring 105 together is shaped as protuberance 118, rear portion at the lid snap close insertion groove 107 of lower house 102a is provided with the locking piece 119 of protuberance 118 correspondences therewith, thereby when the locking protuberance 110 of lid snap close 104 is locked on the inboard locking protuberance 120 of lid 103, can not produce the phenomenon of excessive locking.

In addition, as shown in Figure 8, utilize lid snap close 104 and lid spring 105 movably to be installed in the inside part of the lid 103 in the upper shell 102 of tape cassete 101 and lower house 102a the place ahead, be provided with spring fixedly protuberance 121, spring locking pillar 112 and spring guiding locking protuberance 123, this protuberance 123 and spring lock certain portions 122 relatively are positioned at higher position, so lid spring 105 is connected with lid easily.

Fig. 5 (a) and 5(b) be respectively the enlarged side view of the embodiment of the invention, as shown in the figure, lid snap close 104 can sway, and is encased in the video tape recorder (not shown) or from At time of eject locking wherein with discharge lid 103 with convenient tape cassete 101.The upside of the spring support 106 of this lid snap close is formed circular groove 115, thereby the circular groove contact is shaped as annular section 105a with the end that elastic force offers the lid spring 105 of lid snap close 104 therewith.Because the circular groove 115 of the spring support 106 of lid snap close 104 and the annular section 105a of spring 105 contact with sliding type, and lid snap close 104 sways, so the locking of lid snap close 104 and releasing operation can be realized smoothly.

Therefore, can realize the breakdown and the shutoff operation of lid 103 smoothly, thereby prevent the scraping phenomenon of lid snap close.

As Fig. 6 (a) with 6(b), the square protuberance 109 in the bottom of lid snap close 104 is used for when pack into video tape recorder or from At time of eject wherein of tape cassete 101, the elastic force by lid spring 105 and the thrust of snap close released strip (not shown) make lid 103 lockings and unclamp, the upside of the square protuberance 109 in this bottom has convex part 116, the drift angle of the outboard end protuberance 114 of the lid snap close insertion groove 107 on lower house 102a is shaped as the corresponding concave portions 117 of convex part therewith, thereby sway when lid snap close 104, when carrying out the locking of lid 3 and releasing operation, the bottom protuberance 109 of lid snap close 104 can not be stuck on the end protuberance 114 of lower house 109a, thereby makes lid 103 can realize correct locking and releasing operation.Therefore between the square protuberance 109 of the end of lower house 102a protuberance 114 and lid snap close 104, can not produce wearing and tearing.

As Fig. 7 (a) with 7(b), the spring support 106 of lid snap close 104 is configured in the lid snap close insertion groove 107 of upper shell 102 and lower house 102a, and is bearing in a side of lid spring 105 by the elastic force of the lid spring 105 that locks lid 103.The downside of this spring support 106 has braking protuberance 118, has locking piece 119 corresponding to this protuberance at the rear portion of lid snap close insertion groove 107, when locking protuberance 110 in the bottom of lid snap close 104 is locked on the inboard locking protuberance 120 of lid 103 of tape cassete 101 by means of the elastic force of lid spring 105, because braking protuberance 118 contacts with locking piece 119, thereby the excessive locking phenomena of locking protuberance 110 that can generating box cover lock button 104.Thereby can carry out releasing operation smoothly from the lock-out state of lid.

As Fig. 9 (a), 9(b) and 9(c) shown in, lid 103 is installed in the front portion of tape cassete 101 and can moves between breakdown position and off-position, the inside part of this lid 103 has spring fixed salient 121, spring locking pillar 112 and spring guiding locking protuberance 123, and protuberance 123 is in than spring and locks 122 high positions.

If lid spring 105 will be installed on the lid, then lid spring 105 is inserted on the spring locking pillar 112 that is placed in lid 103 inside parts, make an end of lid spring be locked in spring fixedly on the protuberance 121, the other end of lid spring is locked onto on the spring guiding locking protuberance 123, subsequently the lid spring is connected on upper shell 102 and the lid.Because an end of lid spring 105 locks onto on the spring guiding locking protuberance 123, and the other end of lid spring 105 separates with protuberance 123 and be locked in the spring that is installed on the lid 103 fixedly on the protuberance 121, thereby can easily carry out the assembling of lid spring.

As previously mentioned, according to the present invention, when pack into video tape recorder or be used to lock and discharge the groove that the spring support upside of the lid snap close of lid has circular arc of tape cassete from At time of eject wherein, an end of supporting the lid spring of this groove with elastic force then is shaped as annular section, therefore the locking and the releasing operation of the sway operation and the lid of lid snap close can carry out smoothly, and the noise of scraping damage phenomenon and video tape recorder on the spring support of lid snap close can not produce yet.

, improved according to tape cassete quality of the present invention, the life-span has increased for this reason.

In addition, be used for having the convex part in tape cassete locking and the bottom protuberance upside that discharges the lid snap close of lid, the end teat of the lid snap close insertion groove of lower house has concave portions, thereby sway when the lid snap close, make the lid locking of tape cassete and when discharging, the bottom protuberance of lid snap close can not be stuck on the end protuberance of lower house, thereby can correctly realize the operation of lid snap close.Therefore also can correctly realize the locking and the releasing operation of lid, thereby prevent between the protuberance of the end of the bottom of lid snap close protuberance and lower house, to clash into.The shortcoming that produces on tape cassete and tape route machine thereby can be solved has increased their function, damages other assembly simultaneously in the time of can also preventing to pack into.

Therefore increased the serviceable life of tape cassete.In addition, because the spring support downside that is used to lock and discharges the lid snap close of tape cassete lid has the braking protuberance, and the rear portion of the lid snap close insertion groove of lower house is provided with locking piece, so when locking protuberance in the bottom of lid snap close sways, thereby when utilizing the inboard locking piece of elastic force locking lid of lid spring, the braking protuberance of lid snap close just locks onto on the locking piece of lid snap close insertion groove of lower house, has stopped lock operation.And prevented the excessive locking phenomena of lid at the same time, thereby can carry out releasing operation smoothly from the lock-out state of lid, the operational motion amplitude of the snap close released strip of video tape recorder can be not excessive, the increased functionality of tape route machine.Secondly, lid can carry out level and smooth releasing operation, thereby can improve the quality and the serviceable life of tape cassete.

In addition, because spring is protuberance fixedly, spring locking pillar and the position spring guiding locking protuberance higher slightly than the spring locking of upper shell is installed in the inside part of lid, so that supporting is used to lock and lid that discharges tape cassete and the easy spring of putting into the lid inside part that is connected, there, the lid spring is inserted on the spring locking pillar, and an end of lid spring is locked on the spring guiding locking protuberance and with upper shell and is connected, spring on the lid is opened and locked onto to another end of lid spring and spring guiding locking projection fixedly on the protuberance, and the assembly work of lid spring is easy, so the present invention can reach the effect that reduces lid spring assembling loss percentage.Owing in the assembly work of lid spring, avoided the spring loss, thereby increased economic benefit, in addition, also improved work efficiency and productive capacity, reduced the installation time of lid spring.

Yet should be understood that, the purpose that does not exist any the present invention of making to be limited to the particular forms disclosed, but opposite, the form that the present invention includes all remodeling that belong in the spirit and scope of the present invention of in appended claims, explaining, other structure and be equal to.

Claims (3)

1, a kind of lid locking device of tape cassete, this tape cassete have upper and lower casing and movably are assemblied on above-mentioned two housings and the lid that can move between open site and off-position, and described lid locking device comprises:

Be contained in the lid snap close on the tape cassete pivotly, can between Hasp lock allocation and lid off-position, move pivotally;

A lid spring that impels lid to enter off-position; It is characterized in that:

Be provided with contact mechanism what described Hasp lock was buckled, be used for the accommodating box lid spring, this contact mechanism is used for when the locking of carrying out lid and releasing operation, between lid snap close and a lid spring, produce level and smooth contact action, described mechanism comprises one at the annular section of circular groove and on the lid spring that Hasp lock is buckled, when the lid screw-home movement so that and when doing smooth motion between the spring, described annular section is received within the described circular groove;

Be located at the clamp-proof mechanism that Hasp lock is buckled, this mechanism is used for preventing blocking between lid fore shaft and the tape cassete when the lid fore shaft moves between latched position and off-position;

And be located at the locking control gear that Hasp lock is buckled, between lid fore shaft and tape cassete, be used for eliminating generation excessive wear between the two.

2, lid locking device as claimed in claim 1 is characterized in that:

Described clamp-proof mechanism comprises a convex part of the bottom protuberance that is located at the lid snap close, and be located at described lower house an end protuberance, divide a corresponding locational concave portions with described male portion.

3, lid locking device as claimed in claim 1 is characterized in that: described locking control gear comprises that one is located at the corresponding with it locational locking piece that braking protuberance and that Hasp lock buckles is located at lower house.

Images