CN113163660A - Locking device for printed circuit board - Google Patents
Locking device for printed circuit board Download PDFInfo
- Publication number
- CN113163660A CN113163660A CN202110377111.4A CN202110377111A CN113163660A CN 113163660 A CN113163660 A CN 113163660A CN 202110377111 A CN202110377111 A CN 202110377111A CN 113163660 A CN113163660 A CN 113163660A
- Authority
- CN
- China
- Prior art keywords
- hole
- circuit board
- printed circuit
- wedge
- locking strip
- 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.)
- Pending
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
- H05K7/1402—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards
- H05K7/1407—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards by turn-bolt or screw member
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
- H05K7/1402—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards
- H05K7/1404—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards by edge clamping, e.g. wedges
Abstract
The application discloses printed circuit board locking device contains direction dog, and set screw rod tip has the flange. The guide stop block is provided with a through hole which is a stepped hole, the hole surface of a first hole diameter of the through hole faces the wedge-shaped locking strip, the first hole diameter is larger than the diameter of the flange, and a second hole diameter is smaller than the diameter of the flange; when the set screw is relaxed, the flange is received within the through hole of the first aperture. The scheme of this application has solved short screw rod formula wedge locking strip and has twisted the screw rod when unblock excessively and the problem that screw rod and front slider drop that arouse.
Description
Technical Field
The application relates to the field of electronic circuits, in particular to a locking device of a printed circuit board.
Background
With the continuous development of electronic technology and the continuous progress of the field of integrated circuits, electronic devices have been gradually developed from a plurality of single-function discrete devices to a single multi-function integrated device. The field replaceable module (LRM) is widely applied to multifunctional integrated equipment, and powerful support is provided for realizing the diversification of equipment functions and the replaceability of modules.
Wedge-shaped locking bars are important structural securing and heat transfer devices for field replaceable modules, which are typically mounted directly or indirectly via gaskets or the like on a printed circuit board. Locking or unlocking of the field replaceable module within the chassis may be accomplished by twisting the wedge locking bar screw. The existing locking strip is divided according to the length of an end screw rod and can be divided into a long screw rod full-penetration type locking strip and a short screw rod type locking strip, wherein the short screw rod locking strip has the advantages of longer selectable length specification, lighter weight and the like, and has wide application in engineering. However, since the screw-screwing position of the short screw type locking bar is located at the front end of the slide, i.e. the locking end, when the screw is rotated counterclockwise to unlock the module, there is a risk that the screw and the front slide block on the slide fall off due to over-screwing of the screw.
Disclosure of Invention
The application provides a printed circuit board locking device, solves the problem that a screw and a front sliding block fall off caused by excessively screwing the screw during unlocking of a short screw type wedge-shaped locking bar.
The embodiment of the application provides a printed circuit board locking device, contains the wedge locking strip that has positioning screw, and when positioning screw screwed, the wedge portion that acts on wedge locking strip made it expand outward, printed circuit board locking device still contains the direction dog.
The end of the positioning screw rod is provided with a flange; the guide stop block is provided with a through hole, and when the stop block and the wedge-shaped locking strip are fixedly installed, the axial direction of the through hole is consistent with the direction of the rotation axis of the positioning screw rod; the through hole is a stepped hole, the hole surface of a first hole diameter of the through hole faces the wedge-shaped locking strip, the first hole diameter is larger than the diameter of the flange, and a second hole diameter is smaller than the diameter of the flange; when the set screw is relaxed, the flange is received within the through hole of the first aperture.
In another embodiment of the application, the end surface of the positioning screw rod is provided with a regular hexagonal hole, and a hexagonal wrench can be inserted into the regular hexagonal hole; the second aperture is larger than the aperture of the regular hexagonal hole.
In another embodiment of the present application, the end of the positioning screw comprises a positioning nut having a diameter smaller than the second bore diameter.
Preferably, when the positioning screw rod is loosened, the end part of the positioning screw cap is accommodated in the through hole of the second aperture. Further preferably, when the positioning screw rod is screwed, the end of the positioning screw nut is still accommodated in the through hole of the second aperture.
Further preferably, the flange remains received within the through bore of the first bore when the set screw is tightened.
In another embodiment of the present application, a mid-pad is also included. The length and the width of the middle gasket are consistent with those of the bottom of the wedge-shaped locking strip; the middle gasket is fixedly connected with the bottom of the wedge-shaped locking strip.
In another embodiment of the present application, a non-slip gasket is further included. The anti-skid gasket and the wedge-shaped locking strip are respectively positioned on two sides of the printed circuit board and fixedly installed. The static friction coefficient of the outer surface of the anti-slip gasket exceeds a set value.
Preferably, the guide stopper and the middle spacer are of an integral structure.
Further preferably, the guide stopper and the anti-slip gasket are of an integral structure.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the application relates to a printed circuit board locking device for a wedge-shaped locking strip screw of a printed circuit board. The locking device of the printed circuit board comprises an integral guide stop block with an anti-drop guide function, a positioning screw with a positioning and restraining function, a middle gasket with a fixed locking strip function and an anti-slip gasket. This application installs flange formula positioning screw in wedge locking strip locking end, and the collocation use on printed circuit board is installed jointly with the direction dog, can effectively solve former wedge locking strip locking screw excessively to revolve the problem of droing of twisting the arousing. Meanwhile, the friction force between the module and the rail is improved by adding the locking strip gasket, and the reliability of the whole module is further improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic view of an unlocked state of a locking device of a printed circuit board according to the present application;
FIG. 2 is a schematic diagram of a locking state of the locking device for the printed circuit board according to the present application;
FIG. 3 is a schematic structural diagram of a guide stopper according to an embodiment of the present application;
FIG. 4 is a schematic view of a positioning screw according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of an embodiment of the present apparatus including a spacer structure;
FIG. 6 is a schematic view of a printed circuit board locking device of the present application mounted to a socket structure shown in FIG. 1;
fig. 7 is a schematic view of the state of the pcb locking apparatus of the present application mounted to the socket structure 2.
In the figure:
1-guide stop block 2-positioning screw rod 3-wedge-shaped locking strip
4-printed circuit board 5-middle gasket 6-antiskid gasket
7-field replaceable module 8-slot structure 101-anti-drop guide part
102-base part 201-nut 202-flange
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic view of an unlocking state of the locking device for the printed circuit board of the present application, and fig. 2 is a schematic view of a locking state of the locking device for the printed circuit board of the present application.
The utility model provides a printed circuit board locking device for wedge locking strip screw rod is provided with the direction dog to improve current short screw rod wedge locking strip screw bolt for flange formula screw rod, the two is installed on printed circuit board jointly. The guide stop block and the positioning screw are matched for use, so that the problem that the original wedge-shaped locking strip screw is easy to fall off due to excessive screwing can be effectively solved, and the reliability of the whole replaceable module is improved.
Therefore, the embodiment of the application provides a locking device of a printed circuit board, which comprises a wedge-shaped locking strip 3 with a positioning screw rod 2, wherein the positioning screw rod is arranged at the locking end of the wedge-shaped locking strip. When the positioning screw is screwed, the wedge-shaped part of the wedge-shaped locking strip is acted on to expand the wedge-shaped locking strip. The printed circuit board locking device further comprises a guide stop block 1.
In one embodiment provided herein, a locking device for a printed circuit board with a wedge locking bar screw comprises: guide stop 1, positioning screw 2, middle gasket 5 and anti-skidding gasket 6. The middle gasket is matched with the anti-slip gasket for use, the middle gasket is arranged between the locking strip and the printed circuit board, the counter bore gasket is arranged on the printed circuit board, and the opposite side of the locking strip is arranged.
Fig. 3 is a schematic structural view of the guide stopper of the present application.
For example, the guide block 1 is an integral structural member, and is divided into a drop-off prevention guide portion 101 and a base portion 102 according to its function.
The guide stopper 1 has a through hole to constitute an anti-dropping guide portion. When the stop block and the wedge-shaped locking strip are fixedly installed, the axial direction of the through hole is consistent with the direction of the rotation axis of the positioning screw rod; the through hole is a stepped hole, and the hole surface of the first aperture of the through hole faces the wedge-shaped locking strip. As shown by the coordinates of fig. 3, the falling off prevention guide part 101 has stepped light holes in the X axis direction at the side surfaces thereof, the stepped hole holes having a diameter of phi 5mm (second hole diameter) and a diameter of phi 6.2mm (first hole diameter), respectively, wherein the hole depth of phi 6.2mm in the present embodiment is 4.5 mm.
The height of the base portion 102 is kept the same as the height of the middle pad 5, the height of the middle pad 5 being 4.5mm in this embodiment. And two M2 threaded holes are formed in the bottom surface of the baffle plate along the Z-axis direction and are used for fixing the guide stop block.
Fig. 4 is a schematic view of the positioning screw structure of the present application.
The end of the positioning screw rod is provided with a flange. The first aperture is larger than the flange diameter and the second aperture is smaller than the flange diameter; when the set screw is relaxed, the flange is received within the through hole of the first aperture.
In another embodiment of the application, the end surface of the positioning screw rod is provided with a regular hexagonal hole, and a hexagonal wrench can be inserted into the regular hexagonal hole; the second aperture is larger than the aperture of the regular hexagonal hole. The diameter of the regular hexagonal hole refers to the diameter of a circumscribed circle of the regular hexagonal hole.
In another embodiment of the present application, the end of the positioning screw comprises a positioning nut having a diameter smaller than the second bore diameter.
As the best embodiment of this application, positioning screw 2 nut end is the flange structure, and positioning screw 2 nut 201 diameter is 4.6mm, and flange 202 diameter is 6mm, and the nut end has the regular hexagon hole that the opposite side interval is 2.5mm for inserting the hexagonal spanner.
The positioning stud is used for replacing an end screw rod originally arranged on the wedge-shaped locking strip.
The guide stop block and the positioning screw require that the stepped unthreaded hole of the guide stop block coincides with the axis of the positioning screw during installation. When the locking bar is unlocked by screwing the positioning screw, the nut part of the positioning screw can naturally extend into the first aperture through hole with the diameter of 6.2mm of the guide stop block; when the locking strip is in a complete unlocking state, the ladder of the guide stop block blocks the flange part of the positioning nut, so that the anti-falling function is realized.
Preferably, when the positioning screw rod is loosened, the end part of the positioning screw cap is accommodated in the through hole of the second aperture. Further preferably, when the positioning screw is screwed, although the positioning nut, which is a part of the positioning screw body, moves along with the positioning screw in the direction of the wedge-shaped locking strip, the end of the positioning nut is still accommodated in the through hole of the second bore.
It is further preferred that the flange is received in the through hole of the first bore when the set screw is tightened, although the flange is part of the body of the set screw and moves with the set screw in the direction of the wedge locking bar.
FIG. 5 is a schematic diagram of an embodiment of the present invention apparatus including a gasket structure.
In another embodiment of the present application, a middle spacer 5 is also included. The length and the width of the middle gasket are consistent with those of the bottom of the wedge-shaped locking strip. The middle gasket is fixedly connected with the bottom of the wedge-shaped locking strip.
For example, the intermediate washer 5 has a thickness of 4.5mm and a length corresponding to the length of the body (without its head screw) in the fully unlocked state of the locking bar 3. The middle gasket contact surface has 4 screw holes and 3 unthreaded holes, and 4 screw holes are equidistant to be arranged for connecting printed circuit board 4 and anti-skidding gasket 6. The distance between the 3 unthreaded holes is consistent with the distance between the threaded holes of the locking strips.
In another embodiment of the present application, a non-slip shim 6 is also included. The anti-skid gasket and the wedge-shaped locking strip are respectively positioned on two sides of the printed circuit board and fixedly installed. The static friction coefficient of the outer surface of the anti-slip gasket exceeds a set value.
For example, the shape of the anti-skid gasket is consistent with that of the middle gasket, the surface of the anti-skid gasket is a counter bore corresponding to the threaded hole and the unthreaded hole on the surface of the middle gasket, and the sinking depth of the counter bore is 3 mm.
It should be noted that the printed circuit board is usually made of epoxy glass cloth board material, the static friction coefficient of the reference glass product and metal in a non-lubricated state is 0.5-0.7, and the static friction coefficient between aluminum and aluminum material is 1.05. Therefore, the maximum static friction force of the module after the aluminum anti-skid gasket is added is obviously improved compared with the friction force between the printed board and the slot structure, the module can be effectively prevented from loosening and sliding, and the reliability of the whole module is further improved.
As shown in fig. 5, the guide stopper and the middle spacer are preferably of an integral structure. Further preferably, the guide stopper and the anti-slip gasket are of an integral structure.
Fig. 6 is a schematic view of a state of the pcb latch of the present application mounted to the socket structure 1, and fig. 7 is a schematic view of a state of the pcb latch of the present application mounted to the socket structure 2.
When the module 7 is replaceable on the installation site, the unlocking state of the locking strip 3 needs to be kept, after the module 7 is installed in place along the slot structure 8, the positioning screws 2 on the left side and the right side of the module 7 are screwed by a hexagonal wrench for locking until the tensioning state shown in fig. 6 is achieved, and then installation is completed.
Therefore, the present application further provides a novel printed circuit board locking method, and the installation manner of each part in the embodiment of the present application is as follows:
the positions of the reserved holes at the two ends of the printed circuit board 3 are that from top to bottom: locking strip 3, middle gasket 5, printed circuit board 3, antiskid gasket 6. When the anti-skid gasket is installed, the middle gasket 5 and the anti-skid gasket 6 are fixed on the front side and the back side of the printed circuit board 3 by using M2.5 screws, and then M2 screws (the specific type and size of the screws are determined according to the requirement of a locking strip sample) penetrate through the anti-skid gasket 6 until the anti-skid gasket is screwed into threaded holes of the locking strip 3 on the opposite side;
the positioning screw rod 2 is arranged on the wedge-shaped locking strip 3 to replace the original screw rod of the wedge-shaped locking strip 3;
guide stop block 1 is installed on printed circuit board 4 through the bottom screw thread, holds that necessary the ladder unthreaded hole axis that keeps guide stop block 1 coincides along the X axle direction with 2 axes of positioning screw, and guide stop block 1 is 1.5mm with 5 intervals of locking strip gasket in this embodiment, and this interval can be according to the different model adjustment of locking strip.
Through the technical scheme, the positioning screw rod is arranged at the locking end of the wedge-shaped locking strip; the wedge-shaped locking strip, the middle gasket, the printed circuit board and the anti-skid gasket are installed in series through screws from top to bottom. The guide stop block is arranged on the printed circuit board through a screw assembly and is coincided with the rotation axis of the positioning screw rod. When the positioning screw is screwed to unlock the wedge-shaped locking strip, the nut part of the positioning screw (2) can extend along the guide unthreaded hole of the guide stop block (1); when the locking strip is completely unlocked, the guide stop block (1) realizes the limiting of the positioning screw rod (2), so that the anti-falling function is realized.
When the field replaceable module 7 needs to be disassembled, the positioning screws 2 on the left side and the right side of the field replaceable module 7 are screwed through a hexagonal wrench, and in the unlocking process, the screw caps 201 of the positioning screws 2 enter the unthreaded holes with the diameter of phi 6.2mm of the anti-falling guide portions 101 until the locking strips 3 are completely unlocked. At the moment, the guide stop block 1 positions and stops the positioning screw rod 2, and the anti-falling function is achieved. The field replaceable module 7 can be removed for maintenance or replacement along the socket structure 8.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A printed circuit board locking device comprises a wedge-shaped locking strip with a positioning screw, and a guide stop block, wherein when the positioning screw is screwed tightly, the wedge-shaped locking strip acts on a wedge-shaped part of the wedge-shaped locking strip to enable the wedge-shaped locking strip to be outwards expanded;
the end of the positioning screw rod is provided with a flange;
the guide stop block is provided with a through hole, and when the stop block and the wedge-shaped locking strip are fixedly installed, the axial direction of the through hole is consistent with the direction of the rotation axis of the positioning screw rod;
the through hole is a stepped hole, the hole surface of a first hole diameter of the through hole faces the wedge-shaped locking strip, the first hole diameter is larger than the diameter of the flange, and a second hole diameter is smaller than the diameter of the flange;
when the set screw is relaxed, the flange is received within the through hole of the first aperture.
2. The locking device for printed circuit board according to claim 1, wherein the end face of said positioning screw has a regular hexagonal hole for inserting a hexagonal wrench; the second aperture is larger than the aperture of the regular hexagonal hole.
3. A printed circuit board locking device as claimed in claim 1 wherein the end of the set screw includes a set nut having a diameter less than the second aperture.
4. A printed circuit board locking apparatus as claimed in claim 3 wherein the end of said retaining nut is received in the through hole of the second aperture when said retaining screw is loosened.
5. A printed circuit board locking device as claimed in claim 3 wherein the end of said retaining nut is received in the through hole of the second aperture when said retaining screw is tightened.
6. A locking device for a printed circuit board according to any one of claims 1 to 5,
when the positioning screw is screwed, the flange is accommodated in the through hole of the first aperture.
7. A locking device for a printed circuit board according to any one of claims 1 to 5, further comprising an intermediate spacer;
the length and the width of the middle gasket are consistent with those of the bottom of the wedge-shaped locking strip;
the middle gasket is fixedly connected with the bottom of the wedge-shaped locking strip.
8. A locking device for a printed circuit board according to any one of claims 1 to 5, further comprising an anti-slip spacer;
the anti-skid gasket and the wedge-shaped locking strip are respectively positioned on two sides of the printed circuit board and fixedly installed;
the static friction coefficient of the outer surface of the anti-slip gasket exceeds a set value.
9. The printed circuit board locking apparatus of claim 7 wherein said guide stop and said intermediate spacer are of unitary construction.
10. The printed circuit board locking apparatus of claim 8 wherein said guide stop and said anti-slip gasket are of unitary construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110377111.4A CN113163660A (en) | 2021-04-08 | 2021-04-08 | Locking device for printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110377111.4A CN113163660A (en) | 2021-04-08 | 2021-04-08 | Locking device for printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113163660A true CN113163660A (en) | 2021-07-23 |
Family
ID=76889285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110377111.4A Pending CN113163660A (en) | 2021-04-08 | 2021-04-08 | Locking device for printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113163660A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116437617A (en) * | 2023-04-11 | 2023-07-14 | 小米汽车科技有限公司 | Vehicle-mounted controller and vehicle |
-
2021
- 2021-04-08 CN CN202110377111.4A patent/CN113163660A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116437617A (en) * | 2023-04-11 | 2023-07-14 | 小米汽车科技有限公司 | Vehicle-mounted controller and vehicle |
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