CN109906007B - Fixing device in compact space - Google Patents
Fixing device in compact space Download PDFInfo
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- CN109906007B CN109906007B CN201910226973.XA CN201910226973A CN109906007B CN 109906007 B CN109906007 B CN 109906007B CN 201910226973 A CN201910226973 A CN 201910226973A CN 109906007 B CN109906007 B CN 109906007B
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- sliding block
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Abstract
The invention discloses a fixing device in a compact space, which comprises: the locking device comprises a locking screw rod (1), a first floating wedge-shaped sliding block (2), a fixed wedge-shaped sliding block (3), a second floating wedge-shaped sliding block (4), a spring (5) and a nut (6). First unsteady wedge slider (2), second unsteady wedge slider (4) pass through direction boss and guide way cooperation with fixed wedge slider (3), and spring (5) are installed in fixed wedge slider (3), and spring (5) exert elasticity to locking screw (1), and the elasticity direction that spring (5) were applyed is perpendicular with the stationary plane of first unsteady wedge slider (2), and point to the installation face of fixed wedge slider (3). The invention has the beneficial effects that: the locking device can prevent the floating wedge-shaped sliding block from rotating, and the floating wedge-shaped sliding block is loosened in an unlocked state to cause error locking, and meanwhile, reliable locking force can be provided, and the vibration resistance of a fixed object is improved.
Description
Technical Field
The present invention relates to a fixing device, and more particularly to a fixing device in a compact space.
Background
The use of wedge-type locking devices for component mounting in tight spaces, such as the mounting of printed circuit boards in cabinets, is now widespread. The locking device adopts the rotation motion of a threaded rod to drive the wedge-shaped slide block to move back and forth to form locking force. When the fixing device is in a free state, the sliding block is easy to deflect, and when the distance between the circuit board and the case is small, the deflected sliding block is easy to interfere with the case, so that the circuit board is difficult to assemble. In addition, when the printed circuit board is installed along the gravity direction, the wedge block of the wedge-shaped locking device is still in an unfolded state even if the fastening screw is completely loosened due to the fact that the sliding block of the wedge-shaped locking device is under the action of gravity in the disassembling process, and the printed circuit board cannot be smoothly pulled out of the chassis. In order to solve the above problem, there is a patent (grant publication: CN201866027U) that proposes a wedge-shaped locking device with directional rotation prevention, which utilizes a projection on the slider and a groove on the circuit board to limit the deflection motion of the slider, thereby improving the environmental adaptability of the wedge-shaped locking device. The device requires the design of a groove of a specific shape and size on the circuit board, increasing the design and manufacturing costs of the circuit board. Still another patent (grant No. CN104895878A) proposes a slide rail type wedge locking device, which uses a U-shaped groove guide rail and a slider to cooperate, to limit the moving direction of the slider, uses a spring to provide restoring force for the slider to counteract the influence of gravity, and at the same time provides pre-tightening force to prevent the printed board wedge locking device from loosening. The problem that the sliding block deflects and is difficult to disassemble is solved by the locking device, but the processing difficulty is increased by the U-shaped groove guide rail and the sliding block, and meanwhile, the wall thickness of the U-shaped groove guide rail is small, so that the locking capacity of the device is limited.
Disclosure of Invention
The invention aims to provide a fixing device in a compact space, and solves the problems of high installation difficulty and inconvenience in disassembly of a conventional wedge-shaped locking device.
According to a first aspect of the present invention there is provided a fixture in a compact space comprising: locking screw, first unsteady wedge slider, fixed wedge slider, second unsteady wedge slider, spring and nut.
The first floating wedge-shaped sliding block is provided with a through hole, the fixed wedge-shaped sliding block is provided with a through groove, the second floating wedge-shaped sliding block is provided with a threaded hole, the tail end of the locking screw rod is provided with a thread, the locking screw rod passes through the through hole on the first floating wedge-shaped sliding block and the through groove on the fixed wedge-shaped sliding block, the first floating wedge-shaped sliding block, the second floating wedge-shaped sliding block and the fixed wedge-shaped sliding block are matched with a guide groove through guide bosses by the threads, the guide bosses or the guide groove are respectively positioned at two ends of the fixed wedge-shaped sliding block and one end of the first floating wedge-shaped sliding block and one end of the second floating wedge-shaped sliding block, a spring is arranged in the fixed wedge-shaped sliding block, one end of the spring is contacted with a locking screw rod, the other end of the spring is in contact with the fixed wedge-shaped sliding block, the spring applies elastic force to the locking screw, and the direction of the elastic force applied by the spring is perpendicular to the fixed surface of the first floating wedge-shaped sliding block and points to the installation surface of the fixed wedge-shaped sliding block.
One end of the first floating wedge-shaped sliding block and one end of the second floating wedge-shaped sliding block are guide grooves or guide bosses. One end of the fixed wedge-shaped sliding block is a guide groove, the other end of the fixed wedge-shaped sliding block is a guide boss, or both ends of the fixed wedge-shaped sliding block are the guide groove or the guide boss.
Preferably, a third floating wedge-shaped slider is arranged between the first floating wedge-shaped slider and the fixed wedge-shaped slider and between the second floating wedge-shaped slider and the fixed wedge-shaped slider, the third floating wedge-shaped slider is matched with the first floating wedge-shaped slider, the fixed wedge-shaped slider and the second floating wedge-shaped slider through a guide boss and a guide groove, the guide groove or the guide boss is positioned at two ends of the third floating wedge-shaped slider, a spring is installed in the third floating wedge-shaped slider, one end of the spring is in contact with a locking screw rod, the other end of the spring is in contact with the third floating wedge-shaped slider, the spring applies elastic force to the third floating wedge-shaped slider, and the direction of the elastic force applied by the spring is perpendicular to the fixed surface of the third floating wedge-. One end of the third floating wedge-shaped sliding block is a guide groove, the other end of the third floating wedge-shaped sliding block is a guide boss, or both ends of the third floating wedge-shaped sliding block are the guide groove or the guide boss.
Preferably, the locking screw is not threaded in the position where the spring is located.
Preferably, the height of the guide boss and the depth of the guide groove are greater than the displacement of the first floating wedge-shaped slider, the second floating wedge-shaped slider and the third floating wedge-shaped slider in the direction perpendicular to the mounting surface.
Preferably, the spring is an extension spring or a compression spring.
Preferably, the nut is a self-locking nut.
Preferably, the number of nuts is greater than 1.
Preferably, when the locking screw rotates, the first floating wedge-shaped sliding block and the second floating wedge-shaped sliding block are driven to move obliquely downwards and obliquely upwards respectively to form locking. The mounting surface is a contact surface of the fixing device and the fixed object of the printed circuit board, and the fixing surface is a contact surface of the fixing device and the object of the case in a locking state and provides locking force. In order to avoid that the first floating wedge-shaped sliding block and the second floating wedge-shaped sliding block are displaced under the action of gravity to form error locking in an unlocked state, a spring is installed in the fixed wedge-shaped sliding block, one end of the spring is in contact with the locking screw rod, the other end of the spring is in contact with the fixed wedge-shaped sliding block, elasticity is applied to the locking screw rod, and the direction of the elasticity is perpendicular to the fixed surface of the first floating wedge-shaped sliding block and points to the installation surface of the fixed wedge-shaped sliding block. Because the elasticity exists, first floating wedge slider and second floating wedge slider will be hugged closely by the fixed object, even when vertical direction uses, the gravity effect is offset to elasticity, avoids first floating wedge slider and second floating wedge slider outstanding. When locking, the locking force provided by the locking screw is far greater than the elastic force of the spring. The through groove in the fixed wedge-shaped sliding block is a square groove, the height of the groove is larger than the diameter of the locking screw rod, and the locking screw rod moves up and down in the groove.
According to a second aspect of the present invention, there is provided a method for mounting a fixing device, wherein a fixing slot for mounting a printed circuit board is provided on a chassis, and a width of the slot is greater than a sum of a height of the printed circuit board and a height of a fixing wedge slider. The fixed wedge slider is mounted to the printed circuit board by screws. During locking, the locking screw is screwed down to drive the first floating wedge-shaped sliding block, the second floating wedge-shaped sliding block or the third floating wedge-shaped sliding block to move, so that the printed circuit board is tightly pressed on the case, and the purpose of fixing is achieved.
Preferably, the width of the slot is 1mm greater than the sum of the height of the printed circuit board and the height of the fixed wedge slider.
The invention has the beneficial effects that: the wedge-shaped fixing device has the advantages of simple structure, easiness in processing, low cost, easiness in dismounting, good locking effect and capability of effectively locking in a compact space. The locking device provided by the invention is simple in structure and easy to process, can provide large locking force in a compact space, and improves the vibration resistance of a fixed object.
Drawings
FIG. 1 is a schematic view of a fixture in a compact space;
FIG. 2 is a schematic view of a first floating wedge slider configuration;
FIG. 3 is a schematic view of a fixed wedge-shaped slider structure;
FIG. 4 is a schematic view of the mating relationship of the first and second floating wedge shoes with the fixed wedge shoe;
FIG. 5 is a schematic view of a fixture in a compact space containing a third floating wedge shoe;
fig. 6 is a schematic view of a method of installing a fixture.
1. Locking screw 2, first floating wedge-shaped sliding block 3, fixed wedge-shaped sliding block 4 and second floating wedge-shaped sliding block
5. Spring 6, nut 7, third floating wedge-shaped slider 8, printed circuit board 9 and case
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings: as shown in figure 1, the fixing device in a compact space comprises a locking screw rod 1, a first floating wedge-shaped sliding block 2, a fixed wedge-shaped sliding block 3, a second floating wedge-shaped sliding block 4, a spring 5 and a nut 6.
Be equipped with the through-hole on the first wedge slider 2 that floats, there is logical groove on the fixed wedge slider 3, through-hole diameter on the first wedge slider 2 that floats and the logical groove width on the fixed wedge slider 3 are greater than locking screw 1's diameter, threaded hole on the second wedge slider 4 that floats, locking screw 1 end is threaded, the nominal diameter of the screw hole on the second wedge slider 4 that floats and the screw thread on the locking screw 1, pitch etc. are the same with nut 6, locking screw 1 passes through the through-hole on the first wedge slider 2 that floats and the logical groove on the fixed wedge slider 3, through the cooperation of screw thread and the second wedge slider 4 that floats and nut 6, when locking screw 1 is rotatory, it moves to drive first wedge slider 2 that floats and the second wedge slider 4 that floats downwards and upwards to one side respectively, form the locking. In the figure, the mounting surface is a contact surface of the fixing device and an object to be fixed such as a printed circuit board, and the fixing surface is a contact surface of the fixing device and an object such as a case in a locking state and provides a locking force. In order to avoid that the first floating wedge-shaped sliding block 2 and the second floating wedge-shaped sliding block 4 are displaced under the action of gravity to form error locking in an unlocked state, a spring 5 is installed in the fixed wedge-shaped sliding block 3, one end of the spring 5 is in contact with the locking screw rod 1, the other end of the spring 5 is in contact with the fixed wedge-shaped sliding block 3, elasticity is applied to the locking screw rod 1, and the direction of the elasticity is perpendicular to the fixed surface of the first floating wedge-shaped sliding block 2 and points to the installation surface of the fixed wedge-shaped sliding block 3. Because the elasticity exists, first floating wedge slider 2 and second floating wedge slider 4 will be hugged closely by the fixed object, even when vertical direction uses, the elasticity still can offset the action of gravity, avoids first floating wedge slider 2 and second floating wedge slider 4 outstanding. When locking, the locking force provided by the locking screw rod 1 is far greater than the elastic force of the spring 5, and adverse effects on the locking force and the locking reliability can not be caused. In order to ensure the fixing effect of the nuts 6, the nuts 6 are self-locking nuts or the number of the nuts 6 is more than 1. In the structure, the through groove in the fixed wedge-shaped sliding block 3 is a square groove, the height of the groove is larger than the diameter of the locking screw rod 1, and the locking screw rod 1 can move up and down in the groove.
As shown in fig. 2 and 3, the first floating wedge-shaped slider 2, the second floating wedge-shaped slider 4 and the fixed wedge-shaped slider 3 are matched in a manner of a guide boss and a guide groove, so that the moving directions of the first floating wedge-shaped slider 2 and the second floating wedge-shaped slider 4 are limited, and the first floating wedge-shaped slider and the second floating wedge-shaped slider are prevented from deflecting. The guide boss or the guide groove is positioned at one end of the first floating wedge-shaped sliding block 2 and one end of the second floating wedge-shaped sliding block 4 and positioned at two ends of the fixed wedge-shaped sliding block 3. There are a plurality of modes of setting to direction boss and guide way, the first mode is first unsteady wedge slider 2, the one end of the unsteady wedge slider 4 of second is the direction boss, the both ends of fixed wedge slider 3 are the guide way, the second mode is first unsteady wedge slider 2, the one end of the unsteady wedge slider 4 of second is the guide way, the both ends of fixed wedge slider 3 are the direction boss, the third mode is that 2 one end of the unsteady wedge slider of first is the guide way, the one end of the unsteady wedge slider 4 of second is the direction boss, the one end of fixed wedge slider 3 is the direction boss, the other one end is the guide way, the fourth mode is that 2 one end of the unsteady wedge slider are the direction boss, the one end of the unsteady wedge slider 4 of second is the guide way, the one end of fixed wedge slider 3 is the direction boss, the other one end is the guide way.
As shown in fig. 4, after the first floating wedge-shaped slider 2, the second floating wedge-shaped slider 4 and the fixed wedge-shaped slider 3 are installed in place, the first floating wedge-shaped slider 2, the second floating wedge-shaped slider 4 and the fixed wedge-shaped slider 3 are matched with each other through the guide boss and the guide groove, and due to the matching relationship, the first floating wedge-shaped slider 2 and the second floating wedge-shaped slider 4 can only move along the groove and the wedge surface, and lateral deflection movement cannot occur. In order to ensure that the first floating wedge-shaped sliding block 2 and the second floating wedge-shaped sliding block 4 move smoothly, the width of the guide groove is larger than the size of the guide boss, and the guide groove and the guide boss are in transition or clearance fit.
As shown in fig. 5, a third floating wedge-shaped slider 7 is respectively arranged between the first floating wedge-shaped slider 2, the second floating wedge-shaped slider 4 and the fixed wedge-shaped slider 3, and a through groove is formed in the third floating wedge-shaped slider 7, and the locking screw 1 passes through the through groove. When the locking screw rod 1 is screwed up in a rotating mode, the first floating wedge-shaped sliding block 2 and the second floating wedge-shaped sliding block 4 are driven to move towards the fixed wedge-shaped sliding block 3, the third floating wedge-shaped sliding block 7 is extruded to be protruded, and locking is further formed. The spring 5 is arranged in the third floating wedge-shaped sliding block 7, one end of the spring is in contact with the locking screw rod 1, the other end of the spring is in contact with the third floating wedge-shaped sliding block 7, the spring 5 provides elastic force for the third floating wedge-shaped sliding block 7, the elastic force vertically points to the fixing surface of the fixed wedge-shaped sliding block 3, and the third floating wedge-shaped sliding block 7 is prevented from being protruded under the action of gravity to cause error locking. The fixed wedge-shaped sliding block 3 can also be internally provided with a spring 5, the spring 5 provides elastic force for the locking screw rod 1, and the direction of the elastic force vertically points to the fixed surface of the fixed wedge-shaped sliding block 3. In order to prevent the first floating wedge-shaped sliding block 2, the second floating wedge-shaped sliding block 4 and the third floating wedge-shaped sliding block 7 from deflecting, the first floating wedge-shaped sliding block and the second floating wedge-shaped sliding block are matched with the fixed wedge-shaped sliding block 3 through the guide bosses and the guide grooves, and the moving direction of the first floating wedge-shaped sliding block is limited. The setting mode of guide way and direction boss has the multiple, for example, the one end of the wedge slider 4 that floats of first unsteady wedge slider 2 and second can be the guide way, also can be for the direction boss, and the one end of the wedge slider 7 that floats of third and fixed wedge slider 3 can be the guide way, and one end is the direction boss in addition, also can both ends be the guide way or lead the boss. In order to reduce the structural complexity, the spring 5 in the fixed wedge-shaped sliding block 3 can also be eliminated, and the cross section of the through groove in the fixed wedge-shaped sliding block 3 is circular and has a diameter slightly larger than that of the locking screw rod 1.
As shown in fig. 6, the chassis 9 is provided with a fixed slot for mounting the printed circuit board 8, and the width of the slot is larger than the sum of the height of the printed circuit board 8 and the height of the fixed wedge-shaped slider 3 and is at least larger than 1 mm. The fixed wedge shoe 3 is mounted to the printed circuit board 8 by screws. During locking, the locking screw rod 1 is screwed down to drive the first floating wedge-shaped sliding block 2, the second floating wedge-shaped sliding block 4 or the third floating wedge-shaped sliding block 7 to move, and then the printed circuit board 8 is pressed on the case to achieve the purpose of fixing.
Claims (8)
1. A fixture in a compact space, comprising: the locking device comprises a locking screw rod (1), a first floating wedge-shaped sliding block (2), a fixed wedge-shaped sliding block (3), a second floating wedge-shaped sliding block (4), a spring (5) and a nut (6);
a through hole is arranged on the first floating wedge-shaped sliding block (2), a through groove is arranged on the fixed wedge-shaped sliding block (3), a threaded hole is arranged on the second floating wedge-shaped sliding block (4), a thread is arranged at the tail end of the locking screw rod (1), the locking screw rod (1) passes through the through hole on the first floating wedge-shaped sliding block (2) and the through groove on the fixed wedge-shaped sliding block (3) and is matched with the second floating wedge-shaped sliding block (4) and the nut (6) through the thread, the first floating wedge-shaped sliding block (2), the second floating wedge-shaped sliding block (4) and the fixed wedge-shaped sliding block (3) are matched with a guide groove through guide bosses, the guide bosses or the guide grooves are respectively positioned at two ends of the fixed wedge-shaped sliding block (3) and one ends of the first floating wedge-shaped sliding block (2) and the second floating wedge-shaped sliding block (4), the spring (5) is, the other end of the spring is contacted with the fixed wedge-shaped sliding block (3), the spring (5) applies elasticity to the locking screw (1), the direction of the elasticity applied by the spring (5) is vertical to the fixed surface of the first floating wedge-shaped sliding block (2) and points to the installation surface of the fixed wedge-shaped sliding block (3);
the cross section of the through groove in the fixed wedge-shaped sliding block (3) is circular;
one end of the first floating wedge-shaped sliding block (2) and one end of the second floating wedge-shaped sliding block (4) are guide grooves or guide bosses; one end of the fixed wedge-shaped sliding block (3) is a guide groove, the other end of the fixed wedge-shaped sliding block is a guide boss, or both ends of the fixed wedge-shaped sliding block are the guide groove or the guide boss.
2. A fixing device in a compact space according to claim 1, characterized in that a third floating wedge slider (7) is arranged between the first floating wedge slider (2) and the fixed wedge slider (3), and between the second floating wedge slider (4) and the fixed wedge slider (3), the third floating wedge slider (7) is fitted with the first floating wedge slider (2), the fixed wedge slider (3), and the second floating wedge slider (4) through guide bosses and guide grooves, the guide grooves or the guide bosses are located at both ends of the third floating wedge slider (7), the spring (5) is installed in the third floating wedge slider (7), one end of the spring (5) is in contact with the locking screw (1), the other end is in contact with the third floating wedge slider (7), the spring (5) applies an elastic force to the third floating wedge slider (7), the direction of the elastic force applied by the spring (5) is vertical to the fixed surface of the third floating wedge-shaped slider (7) and points to the installation surface of the fixed wedge-shaped slider (3); one end of the third floating wedge-shaped sliding block (7) is a guide groove, the other end of the third floating wedge-shaped sliding block is a guide boss, or both ends of the third floating wedge-shaped sliding block are the guide groove or the guide boss.
3. A fastening device in a compact space according to claim 1 or 2, characterised in that the locking screw (1) is not threaded in the position where the spring (5) is located.
4. A fixture in a compact space according to claim 1 or 2, characterised in that the height of the guide bosses and the depth of the guide grooves are larger than the displacement of the first (2), second (4) and third (7) floating wedge slides in the direction of the vertical mounting surface.
5. A fixture in a compact space according to claim 1 or 2, characterised in that the spring (5) is an extension spring or a compression spring.
6. A fastening device in a compact space according to claim 1 or 2, characterised in that the nut (6) is a self-locking nut.
7. A fastening device in a compact space according to claim 1 or 2, characterised in that the number of nuts (6) is more than 1.
8. A fixture for use in a compact space according to claim 1 or 2, wherein the fixture is operable by: when the locking screw (1) rotates, the first floating wedge-shaped sliding block (2) and the second floating wedge-shaped sliding block (4) are driven to move obliquely downwards and obliquely upwards respectively to form locking; the mounting surface is a contact surface of the fixing device and an object to be fixed of the printed circuit board (8), and the fixing surface is a contact surface of the fixing device and the object of the case (9) in a locking state and provides locking force; in order to avoid that the first floating wedge-shaped sliding block (2) and the second floating wedge-shaped sliding block (4) are displaced under the action of gravity to form error locking in an unlocked state, a spring (5) is installed in the fixed wedge-shaped sliding block (3), one end of the spring (5) is in contact with the locking screw (1), the other end of the spring is in contact with the fixed wedge-shaped sliding block (3), elasticity is applied to the locking screw (1), and the direction of the elasticity is vertical to the fixed surface of the first floating wedge-shaped sliding block (2) and points to the installation surface of the fixed wedge-shaped sliding block (3); due to the existence of the elastic force, the first floating wedge-shaped sliding block (2) and the second floating wedge-shaped sliding block (4) are abutted against a fixed object, even if the device is used in the vertical direction, the elastic force counteracts the action of gravity, and the first floating wedge-shaped sliding block (2) and the second floating wedge-shaped sliding block (4) are prevented from protruding; when locking, the locking force provided by the locking screw rod (1) is far greater than the elastic force of the spring (5); the through groove in the fixed wedge-shaped sliding block (3) is a square groove, the height of the groove is larger than the diameter of the locking screw rod (1), and the locking screw rod (1) moves up and down in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910226973.XA CN109906007B (en) | 2019-03-25 | 2019-03-25 | Fixing device in compact space |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910226973.XA CN109906007B (en) | 2019-03-25 | 2019-03-25 | Fixing device in compact space |
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| Publication Number | Publication Date |
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| CN109906007A CN109906007A (en) | 2019-06-18 |
| CN109906007B true CN109906007B (en) | 2021-02-26 |
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| CN201910226973.XA Active CN109906007B (en) | 2019-03-25 | 2019-03-25 | Fixing device in compact space |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111067281B (en) * | 2019-12-24 | 2021-08-31 | 中国科学院沈阳自动化研究所 | Tail end wedge block locking mechanism suitable for standard drawer module |
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| CN104329333A (en) * | 2014-08-29 | 2015-02-04 | 中航光电科技股份有限公司 | Wedged locking device and case using wedged locking device |
| CN104895878A (en) * | 2015-03-31 | 2015-09-09 | 成都嘉泰华力科技有限责任公司 | A printed board wedge locking device |
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| CN201866027U (en) * | 2010-11-30 | 2011-06-15 | 中国船舶重工集团公司第七○九研究所 | Directional rotation-preventing wedged locking device |
| KR101233132B1 (en) * | 2011-06-17 | 2013-02-14 | 엘아이지넥스원 주식회사 | Edge Lock for Preventing All-directional Vibration and Shock |
| CN202833462U (en) * | 2012-10-24 | 2013-03-27 | 成都奥图科技有限责任公司 | Locking strip |
| CN203604356U (en) * | 2013-11-20 | 2014-05-21 | 中国船舶重工集团公司第七一六研究所 | Locking device for case module |
| CN205623033U (en) * | 2016-05-18 | 2016-10-05 | 成都特锐泰雷兹电子应用科技有限公司 | No guide rail low thermal resistance locking device |
| CN206525063U (en) * | 2017-03-08 | 2017-09-26 | 山西中航天拓科技有限公司 | A kind of wedge locking device of anti-rotation Self-resetting |
| CN107396587B (en) * | 2017-09-25 | 2019-06-28 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The thermally conductive vibration damping of electronic equipment inserts locking assembly |
| CN108430188B (en) * | 2018-02-12 | 2020-03-13 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Wedge-shaped locking device for high-efficiency heat dissipation of electronic module plug-in |
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2019
- 2019-03-25 CN CN201910226973.XA patent/CN109906007B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329333A (en) * | 2014-08-29 | 2015-02-04 | 中航光电科技股份有限公司 | Wedged locking device and case using wedged locking device |
| CN104895878A (en) * | 2015-03-31 | 2015-09-09 | 成都嘉泰华力科技有限责任公司 | A printed board wedge locking device |
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