CN204335223U - Lid structure - Google Patents

Lid structure Download PDF

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Publication number
CN204335223U
CN204335223U CN201290001252.0U CN201290001252U CN204335223U CN 204335223 U CN204335223 U CN 204335223U CN 201290001252 U CN201290001252 U CN 201290001252U CN 204335223 U CN204335223 U CN 204335223U
Authority
CN
China
Prior art keywords
lid
locking hole
main body
engagement pawl
engaging
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
Application number
CN201290001252.0U
Other languages
Chinese (zh)
Inventor
细井祐助
片冈秀康
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Application granted granted Critical
Publication of CN204335223U publication Critical patent/CN204335223U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/02Details
    • H05K5/03Covers

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

A lid structure, it possesses: the first engaging portion, and it has first engagement pawl (10a) locking with the first locking hole being formed at housing; Second engaging portion, its bend via flexibility (7) links with the side opposed with the first engaging portion of lid main body (4), and there is the second engagement pawl (6), second engagement pawl (6) is locking with the second locking hole, and the second locking hole is formed at housing in the mode opposed with the first locking hole; And linking part (8), rigidity between lid main body (4) and the second engaging portion links by it, and limits the second engagement pawl and move with the direction of the engaging of the second locking hole by removing flexure tomorrow of bend.

Description

Lid structure
Technical field
The lid structure of the insert port that the BCAS (BS-condition receiving system: BS-Conditional Access Systems) that the utility model relates to the enciphered data such as covered for ground-wave digital broadcasting of decoding blocks.
Background technology
As the lid for preventing mistake unpacking, there is the lid such as disclosed in patent documentation 1.At this lid via articulated section so that the mode of opening and closing upper cover can be linked with, in the position opposed with articulated section, circumferentially face is provided with longitudinally elongated flat original chip (Virgin chip).In addition, the lower end connecting portion constriction that original chip is formed as being connected with lid must comparatively carefully be formed as rupturing.In the lid with such structure, if open upper cover, then lower end connecting portion ruptures and original chip is come off from lid.Thereby, it is possible to easily know the situation of mistake unpacking.
Patent documentation 1: Japanese Unexamined Patent Publication 9-12054 publication
In the existing technology representated by patent documentation 1, although come off by original chip and the vestige of unpacking can be remained, but there is following problem, that is: in the housing that the original chip come off is mixed into machine or be mixed into the inside being arranged at other peripheral on-vehicle machines, fault may be produced thus.
In addition, such as, in vehicle-mounted digital TV tuner, substantially the replacing of BCAS card can not be carried out after product export, but produce the maintainability of the situations such as fault from the view point of BCAS card corresponding after product export, wish that there is the structure can changing BCAS card from telegon outside.
Utility model content
The utility model completes to solve above-mentioned this problem, its object is to obtain can not produce discarded object and remain the vestige of unpacking lid structure.
Lid structure involved by the utility model is the lid structure installing lid at the peristome of the housing of mounting object, and possess: lid main body, it covers peristome with the closed condition of lid; First engaging portion, it links via from articulated section and lid main body, and has the first engagement pawl, and this first engagement pawl is locking with the first locking hole being formed at housing; Second engaging portion, it links via the side that the bend of flexibility is opposed with same first engaging portion of lid main body, and there is the second engagement pawl, this second engagement pawl and the second locking hole locking, this second locking hole is formed at housing in the mode opposed with the first locking hole; And linking part, rigidity between lid main body and the second engaging portion links by it, and limits the second engagement pawl and move with the direction of the engaging of the second locking hole by removing flexure tomorrow of bend.
According to the utility model, have and can not produce discarded object and the effect remaining the vestige of unpacking.
Accompanying drawing explanation
Fig. 1 is the figure of the electronic equipment representing the lid structure applied involved by the utility model.
Fig. 2 is the figure of the lid of the lid structure represented involved by execution mode 1 of the present utility model.Fig. 2 (a) is the stereogram of lid, Fig. 2 (b) is the figure observing lid from buckling parts side, Fig. 2 (c) is the figure observing lid from engagement pawl side, and Fig. 2 (d) represents the figure of the section of the A-A line of Fig. 2 (a).
Fig. 3 is the figure of the mounting means of the lid of the lid structure represented involved by execution mode 1.Fig. 3 (a) is the front view of the insertion section of BCAS card, and to be the figure of the mounting means representing lid, Fig. 3 (c) be Fig. 3 (b) represents the figure of the situation after the installation of lid.
The cutaway view of mode when Fig. 4 is the first unpacking of the lid of the lid structure represented involved by execution mode 1.Fig. 4 (a) represents engagement pawl hooking and is represent the figure cutting off linking part engaging in the figure of locking hole, Fig. 4 (b), and Fig. 4 (c) is the figure of the engaging representing engagement release pawl.
Fig. 5 is the figure of the open mode of the lid of the lid structure represented involved by execution mode 1.
Fig. 6 is the figure of the lid of the lid structure represented involved by execution mode 2 of the present utility model.
Fig. 7 is the figure of the mounting means of the lid of the lid structure represented involved by execution mode 2.Fig. 7 (a) is the figure of the situation after the installation representing lid, and Fig. 7 (b) is the figure of the section of the C-C line representing Fig. 7 (a).
The cutaway view of mode when Fig. 8 is the first unpacking of the lid of the lid structure represented involved by execution mode 2.Fig. 8 (a) represents engagement pawl hooking and is the figure representing power handle being applied to B direction engaging in the figure of locking hole, Fig. 8 (b), and Fig. 8 (c) is the figure of the engaging representing engagement release pawl.
Embodiment
Below, in order to be described the utility model in more detail, then with reference to the accompanying drawings enforcement mode of the present utility model is described.
Execution mode 1.
Fig. 1 is the figure of the electronic equipment representing the lid structure applied involved by the utility model, as electronic equipment, such as, shows vehicle-mounted digital TV tuner 1.Digital TV tuner 1 receives electric wave via car antenna and carries out channel channel selection, and the process and the digital broadcast data of decoding process encryption is imaged, then exports it to the output device such as display, loud speaker.In addition, BCAS card is used to generate the cryptographic keys for decoded digital broadcast data, and is inserted into the draw-in groove of the insertion section 2 of the side being located at digital TV tuner 1.
Lid Structural application involved by the utility model is in the insertion section 2 of BCAS card.That is, by installing lid 3 in the mode of the draw-in groove covering insertion section 2, thus can prevent foreign matter from invading in telegon housing from draw-in groove.In addition, lid 3 when initial installation, only otherwise make the linking part fracture by Fig. 2 is describing afterwards just can not be formed as open mode.
On the other hand, if make linking part rupture, then easily can cut off vestige from it and identify that BCAS card is by situation about pulling up mistakenly.
Fig. 2 is the figure of the lid of the lid structure represented involved by execution mode 1 of the present utility model, Fig. 2 (a) is the stereogram of lid 3, Fig. 2 (b) is the figure observing lid 3 from buckling parts 10 side, Fig. 2 (c) is the figure observing lid 3 from engagement pawl 6 side, and Fig. 2 (d) represents the section of the A-A line of Fig. 2 (a).As shown in Fig. 2 (a), in lid 3, the engagement pawl 6 formed as one with handle 5 links with lid main body 4 via the bend 7 of flexibility, and buckling parts 10 links with lid main body 4 via from articulated section 9.
Lid main body 4 is as lower part: it covers the peristome becoming the housing of the mounting object of lid 3 under the state of lid 3 closedown, such as, be the part of the draw-in groove of the BCAS card covered in digital TV tuner 1.As shown in Fig. 2 (c), Fig. 2 (d), handle 5 and engagement pawl 6 form as one, and handle 5 is the parts being used to apply towards the direction making the engaging based on engagement pawl 6 remove power.
Engagement pawl 6 engages with locking hole (the second locking hole described later) and engaged, and wherein, this locking hole is formed at the housing of the mounting object of lid 3.Bend 7 is the bends will linked up between one end of lid main body 4 and handle 5, bends to expand bending mode, thus to handle 5 to the direction force making its one end from lid main body 4 be separated.In addition, when applying power to handle 5 to the direction making to remove based on the engaging of engagement pawl 6, then bend 7 bends in its bending mode diminished.
Be formed at the end of the side contrary with handle 5 in lid main body 4 from articulated section 9, lid main body 4 and buckling parts 10 link up by it.Utilize and should, from articulated section 9, lid main body 4 can be made to rotate to opening direction and closing direction.In addition, in order to obtain the elasticity from articulated section 9, each structure of lid 3 can be also integrally formed by resin materials such as polypropylene.
As shown in Fig. 2 (b), buckling parts 10 is first engaging portions being formed with engagement pawl 10a.Engagement pawl 10a inserts locking hole (the first locking hole described later) and passes through to fasten the first locking engagement pawl, and wherein, above-mentioned locking hole is formed at the circumference of the opening of the mounting object becoming lid 3.In addition, if buckling parts 10 is once engaging in locking hole, just cannot extract as long as then do not rupture.
In addition, engagement pawl 6 is second engagement pawls of the second locking hole of housing engaging in the mounting object being formed in lid 3, and the tectosome including handle 5 and engagement pawl 6 becomes second engaging portion with the second engagement pawl.
Linking part 8 is linking parts rigidity between one end of lid main body 4 and the second engaging portion linked, and its restriction engagement pawl 6 by the flexure of bend 7, move by the direction towards engagement release.Such as, as shown in Fig. 2 (a), linking part 8 is parts of spreader shape, and the position rigidity of side contrary with the same engagement pawl 6 of handle 5 for the end upper surface of the side contrary with from articulated section 9 of lid main body 4 is linked.
Fig. 3 is the figure of the mounting means of the lid of the lid structure represented involved by execution mode 1, Fig. 3 (a) is the front view of the insertion section 2 of BCAS card, Fig. 3 (b) represents the mounting means of lid 3, and Fig. 3 (c) represents the situation after the installation of lid 3.
Such as shown in Fig. 3 (a), the mounting object of lid 3 is the insertion sections 2 being formed with draw-in groove 11 in digital TV tuner 1.Locking hole 12 is first locking hole be formed near draw-in groove 11 of insertion section 2, and locking with the buckling parts 10 of lid 3.Locking hole 13 is second locking hole formed in the mode opposed with the locking hole 12 near draw-in groove 11 of insertion section 2, and locking with the second engaging portion of lid 3.
When installing lid 3, first, as shown in Fig. 3 (b), from incline direction, the second engaging portion is inserted locking hole 13 relative to housing, and by engagement pawl 6 hooking in the inner wall part of locking hole 13.
Next, to utilize buckling parts 10 from articulated section 9 to case side bending slightly, make buckling parts 10 embed and engaging in locking hole 12 simultaneously.Thus, as shown in Fig. 3 (c), lid 3 is installed in case side.Lid 3 is engaged is in this way securely mounted in case side in locking hole 12,13.Therefore, only otherwise cut off the linking part 8 that limit flexion portion 7 bends, then cannot open or take off lid 3.That is, the unpacking of mistake is prevented.
The cutaway view of mode when Fig. 4 is the first unpacking of the lid of the lid structure represented involved by execution mode 1.If install lid 3 as described above, then as shown in Fig. 4 (a), engagement pawl 6 hooking engaging in locking hole 13.Due to towards the movement in direction removing this engaging limit by the linking part 8 of spreader shape, even if therefore apply power to handle 5, lid 3 also can not be opened.
In order to open lid 3, need the engaging of engagement release pawl 6, instead of engaging lifting, therefore, as shown in Fig. 4 (b), want the people broken seal to need to utilize the instruments such as pliers cut off linking part 8 and bend 7 is bent.
If cut off the linking part 8 of spreader shape, then as shown in Fig. 4 (c), as long as apply the power in B direction to handle 5, just can engagement release pawl 6 engaging and open lid 3.
In addition, remain at the linking part 8 of spreader shape the vestige utilizing instrument to cut off, therefore, it is possible to easily identify the situation of unpacking.
Further, a side and the lid main body 4 of cut-off linking part 8 link, and the opposing party and handle 5 link, and therefore can not come off from lid 3.
As shown in Figure 5, the engaging of the lid 3 engagement release pawl 6 after unpacking and locking hole 13, and from articulated section 9, lid main body 4 rotated by utilizing and be formed as open mode.In addition, utilize and from articulated section 9, lid main body 4 is rotated to side, insertion section 2, and by making engagement pawl 6 be formed as closed condition engaging in locking hole 13 with the state of carrying out exerting a force from bend 7.Also can be used as lid after breaking seal by this way, thus can prevent foreign matter from invading inside from draw-in groove 11.
In addition, in the above description, show the situation of the lid Structural application involved by the utility model in the insertion section 2 of the BCAS card of vehicle-mounted digital TV tuner 1, but application is not limited thereto.That is, as long as preventing the unpacking of mistake and the electronic equipment with sealing station just can apply the utility model.
As mentioned above, according to the present embodiment 1, lid structure of the present utility model possesses: the first engaging portion, and it has first engagement pawl locking with the first locking hole being formed at housing; Second engaging portion, it links via the side that the bend of flexibility is opposed with same first engaging portion of lid main body, and there is the second engagement pawl, this second engagement pawl is with locking with the second locking hole, and this second locking hole mode opposed with the first locking hole is formed at housing; And linking part, rigidity between lid main body and the second engaging portion links by it, and limit the second engagement pawl by the flexure of bend towards releasing move with the direction of the engaging of the second locking hole.By being formed as such formation, even if cut off linking part 8 to break seal, a side and the lid main body 4 of cut-off linking part 8 link, and the opposing party and handle 5 link, thus can not come off, and therefore do not produce discarded object.In addition, cut-out vestige can be remained at linking part 8 as the vestige of breaking seal, therefore, it is possible to easily identify the situation of unpacking.
In addition, according to the present embodiment 1, because linking part is spreader rigidity between lid main body 4 and the second engaging portion linked, so linking part 8 cannot be made to rupture by using the unpacking of handle 5 operation, thus the unpacking of mistake can be prevented.
Execution mode 2.
Fig. 6 is the figure of the lid of the lid structure represented involved by execution mode 2 of the present utility model.As shown in Figure 6, in lid 3A, same with above-mentioned execution mode 1, the engagement pawl 6 formed as one with handle 5 links with lid main body 4 via the bend 7 of flexibility, and buckling parts 10 links with lid main body 4 via from articulated section 9.
In addition, the linking part 8a of lid 3A is same with above-mentioned execution mode 1, rigidity between one end of lid main body 4 and the second engaging portion is linked, and move in the direction towards engagement release by the flexure of bend 7 to limit engagement pawl 6.Wherein, the part linked with lid main body 4 of linking part 8a is formed as the shape of constriction.
Fig. 7 is the figure of the mounting means of the lid of the lid structure represented involved by execution mode 2, and Fig. 7 (a) represents the situation after the installation of lid 3A, and Fig. 7 (b) represents the section of the C-C line of Fig. 7 (a).When lid 3A is installed on housing, same with above-mentioned execution mode 1, from incline direction, the second engaging portion is inserted locking hole 13 relative to housing, and by engagement pawl 6 hooking in the inner wall part of locking hole 13.Next, to utilize buckling parts 10 from articulated section 9 to case side bending slightly, buckling parts 10 to be embedded and engaging in locking hole 12 simultaneously.
By above-mentioned fitting operation, as shown in Fig. 7 (a), lid 3A can be arranged on case side.Now, as shown in Fig. 7 (b), engagement pawl 10a hooking engaging in locking hole 12, engagement pawl 6 hooking engaging in locking hole 13.In order to open lid 3A, need the engaging of engagement release pawl 6, instead of engaging lifting, therefore need to cut off linking part 8a.
The cutaway view of mode when Fig. 8 is the first unpacking of the lid of the lid structure represented involved by execution mode 2.If install lid 3A as described above, then engagement pawl 6 hooking engaging in locking hole 13 as shown in Fig. 8 (a).In order to open lid 3A, same with above-mentioned execution mode 1, need the engaging of engagement release pawl 6, instead of engaging lifting.
The part linked with lid main body 4 of the linking part 8a involved by execution mode 2 is formed as the shape of constriction, therefore as shown in Fig. 8 (b), by applying the power in B direction to handle 5, and exerts all one's strength and concentrates on the part of constriction.Thus, by applying power to handle 5 further, thus final as shown in Fig. 8 (c), and linking part 8a ruptures, and the engaging of engagement pawl 6 is removed, thus can open lid 3A.
Like this, in the lid 3A involved by execution mode 2, even if unfavorable instrument cuts off linking part 8a, also linking part 8a can be ruptured by common unpacking operation, thus break seal.That is, although do not have the function preventing mistake unpacking, owing to remaining the linking part 8a ruptured, therefore, it is possible to easily identify the situation of unpacking.Further, the linking part 8a ruptured and handle 5 link, and therefore can not come off from lid 3A.
In addition, the engaging of the lid 3A engagement release pawl 6 after unpacking and locking hole 13, and by making lid main body 4 rotate from articulated section 9 and being formed as open mode.In addition, utilize and from articulated section 9, lid main body 4 is rotated to side, insertion section 2, and make engagement pawl 6 engaging in locking hole 13 with the state of carrying out exerting a force from bend 7, be formed as closed condition thus.Also can be used as lid after breaking seal by this way, thus can prevent foreign matter from invading inside from draw-in groove 11.
As described above, according to the present embodiment 2, the part linked with lid main body of linking part is formed as the shape of constriction, and therefore, even if make linking part 8a rupture to break seal, linking part 8a also can link with handle 5 and not come off, and therefore can not produce discarded object.In addition, linking part 8a can be remained as the vestige of breaking seal, therefore, it is possible to easily identify the situation of unpacking.
In addition, the utility model can carry out the combination freely of each execution mode in the scope of its utility model, or can carry out the distortion of arbitrary inscape of each execution mode, or can carry out the omission of arbitrary inscape in each execution mode.
Industrial utilizes feasibility
Lid structure involved by the utility model can not produce discarded object and remain the vestige of unpacking, therefore, such as, is applicable to the lid structure of the BCAS card insert opening covering vehicle-mounted digital TV tuner.
Description of reference numerals
1 ... digital TV tuner; 2 ... insertion section; 3,3A ... lid; 4 ... lid main body; 5 ... handle; 6,10a ... engagement pawl; 7 ... bend; 8,8a ... linking part; 9 ... from articulated section; 10 ... buckling parts; 11 ... draw-in groove; 12,13 ... locking hole.

Claims (3)

1. a lid structure, its peristome at the housing of mounting object installs lid,
The feature of described lid structure is to possess:
Lid main body, it covers described peristome with the closed condition of described lid;
First engaging portion, it links via from articulated section and described lid main body, and has the first engagement pawl, and this first engagement pawl is locking with the first locking hole being formed at described housing;
Second engaging portion, it links via the side of the bend of flexibility with the opposed with described first engaging portion of described lid main body, and there is the second engagement pawl, this second engagement pawl and the second locking hole locking, this second locking hole is formed at described housing in the mode opposed with described first locking hole; And
Linking part, rigidity between described lid main body and described second engaging portion links by it, and limits described second engagement pawl and move with the direction of the engaging of described second locking hole by removing flexure tomorrow of described bend.
2. lid structure according to claim 1, is characterized in that,
Described linking part is spreader shape rigidity between described lid main body and described second engaging portion linked.
3. lid structure according to claim 1, is characterized in that,
The base portion linked with described lid main body of described linking part is the shape of constriction.
CN201290001252.0U 2012-08-31 2012-08-31 Lid structure Expired - Fee Related CN204335223U (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/072170 WO2014033914A1 (en) 2012-08-31 2012-08-31 Cover structure

Publications (1)

Publication Number Publication Date
CN204335223U true CN204335223U (en) 2015-05-13

Family

ID=50182761

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201290001252.0U Expired - Fee Related CN204335223U (en) 2012-08-31 2012-08-31 Lid structure

Country Status (3)

Country Link
JP (1) JP5638172B2 (en)
CN (1) CN204335223U (en)
WO (1) WO2014033914A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI732468B (en) * 2019-04-05 2021-07-01 日商三菱電機股份有限公司 Cover of air circuit breaker

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961583U (en) * 1982-10-19 1984-04-23 三洋電機株式会社 door structure
JPS59171389U (en) * 1983-05-02 1984-11-16 ティーオーエー株式会社 Structure for connecting lid to equipment case
JP3407740B2 (en) * 1992-01-10 2003-05-19 ソニー株式会社 Electronic equipment housing
CA2318545A1 (en) * 1998-01-20 1999-07-22 The Procter & Gamble Company Dispensing closure with integral locking switch and tamper evidency structure
JP2002077518A (en) * 2000-08-25 2002-03-15 Canon Electronics Inc Original image pickup device
JP3802750B2 (en) * 2000-11-22 2006-07-26 矢崎総業株式会社 Sealing device and sealing member
JP2005285482A (en) * 2004-03-29 2005-10-13 Sunx Ltd Electronic equipment
FR2900132B1 (en) * 2006-04-25 2011-01-21 Valois Sas CLOSURE MEMBER, FLUID PRODUCT DISPENSER COMPRISING SUCH ORGAN, AND METHOD OF MANUFACTURING SUCH A DISPENSER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI732468B (en) * 2019-04-05 2021-07-01 日商三菱電機股份有限公司 Cover of air circuit breaker

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Publication number Publication date
JP5638172B2 (en) 2014-12-10
JPWO2014033914A1 (en) 2016-08-08
WO2014033914A1 (en) 2014-03-06

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150513

Termination date: 20200831

CF01 Termination of patent right due to non-payment of annual fee