Screw locking jig for mounting PCB (Printed Circuit Board)

Abstract

The utility model relates to a screw locking jig for mounting a PCB (Printed Circuit Board), which comprises a base, at least one magnetic pressing device is arranged on the base, the magnetic pressing device is suitable for pressing and fixing the PCB and a bearing body on the top surface of the base, and the screw locking jig further comprises a magnetic screwdriver and a screw box suitable for containing screws; by using the screw locking jig, the PCB is fixedly connected to the bearing body through the screws, and the situation that the screws are missed to be locked is not prone to occurring.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw locking fixture technical field, specifically relates to a screw locking fixture for PCB board installation. BACKGROUND

[0002] The liquid crystal display module includes a PCB board and a carrier, and when producing and assembling, the PCB board needs to be fixedly connected to the carrier by a screw through a screwdriver manually, the carrier is a backlight plate or a support, and the manual screw locking is prone to missing locking, therefore, after the PCB board is fixedly connected to the carrier by the screw through the screwdriver manually, the number of screw connections between the PCB board and the carrier needs to be detected by an optical detection device, the optical detection device is high in cost, and the detection result is prone to error. SUMMARY

[0003] The utility model solves the technical problem that the screw locking fixture for PCB board installation is used to fix the PCB board to the carrier by the screw, and missing screw locking is not prone to occur.

[0004] To solve the above technical problem, the utility model provides a screw locking fixture for PCB board installation, which comprises a base, at least one magnetic pressure device is arranged on the base, the magnetic pressure device is suitable for pressing and fixing the PCB board and the carrier on the top surface of the base, and further comprises a magnetic screwdriver and a screw box suitable for containing screws.

[0005] Further preferably, the screw box is detachably fixed to the magnetic screwdriver, the required number of screws for connecting the PCB board and the carrier is placed in the screw box, and the screw box is detachably fixed to the magnetic screwdriver during use, so that the screws are conveniently taken and used.

[0006] Further preferably, the screw box is arranged on a weighing device, and the weighing device and the magnetic pressure device are electrically connected to a controller; during use, the PCB board and the carrier are stacked and placed on the base, the PCB board is above the carrier, the magnetic pressure device is controlled by the controller to press and fix the PCB board and the carrier on the top surface of the base, a plurality of screws are placed in the screw box, the screws are taken from the screw box one by one manually, the PCB board is fixedly connected to the carrier by the screw through the screwdriver, the weighing device transmits a weight signal to the controller, the controller automatically calculates the total number of taken screws according to the change of the weight measured by the weighing device, when the total number of taken screws reaches the designed number of screws required for connecting the PCB board and the carrier, the controller automatically controls the magnetic pressure device to release the PCB board and the carrier, and the PCB board and the carrier can be taken out from the base at this time.

[0007] Further preferably, the controller is a PLC, a single-chip microcomputer or a microcomputer.

[0008] Further preferably, a plurality of positioning holes are formed in the base, a silica gel pad is arranged on the top surface of the base, a positioning column corresponding in position to each of the positioning holes is arranged on the bottom surface of the silica gel pad, the positioning column is fixed in the positioning hole, and the magnetic compression device is adapted to compress and fix the PCB and the carrier on the top surface of the silica gel pad. Since the silica gel pad is made of soft and insulating material, it can prevent the product from being scratched and conducting electricity, and the PCB and the carrier are not easy to move after being compressed. The silica gel pad can be removed from the base, and different silica gel pads with different contours can be replaced, so that the base can accommodate PCBs and carriers of different sizes.

[0009] Further preferably, the number of the positioning holes is four, the four positioning holes are distributed in a quadrilateral shape, and the positioning holes are cylindrical holes. The silica gel pad is simple to install and position and is not easy to move on the base.

[0010] Further preferably, a plurality of strip-shaped protrusions are distributed on the top surface of the silica gel pad. The PCB and the carrier are not easy to move after being compressed on the top surface of the silica gel pad.

[0011] Further preferably, the magnetic compression device is magnetically fixed on the base. The magnetic compression device can be magnetically fixed at any position on the top surface of the base, so that the magnetic compression device can compress and fix PCBs and carriers of different sizes on the top surface of the base.

[0012] Further preferably, the magnetic compression device comprises a bottom plate arranged on the top surface of the base, a metal core arranged at the top end of the bottom plate, a solenoid tube sleeved on the metal core, a cylinder body arranged on the bottom plate and sleeved on the outer side of the solenoid tube, a guide rod slidingly fitted in the cylinder body and located above the metal core, a top plate arranged at the top end of the guide rod and located above the cylinder body, a fixing ring sleeved on the outer side of the cylinder body, a spring sleeved on the outer side of the cylinder body and located between the top plate and the fixing ring, a plurality of guide holes circumferentially distributed on the top plate, a shoulder guide column slidingly fitted in the guide hole, the shoulder of the shoulder guide column located above the top plate, the bottom of the shoulder guide column fixed on the fixing ring, and a pressing rod vertically arranged on one side of the top plate. When the solenoid tube is powered, a dense magnetic field is generated at the top of the metal core according to the principle of current magnetic effect. Under the action of the dense magnetic field, the guide rod moves downward and is attracted to the top of the metal core. At this time, the spring is in a compressed state. When the solenoid tube loses power, the dense magnetic field generated at the top of the metal core disappears. Under the action of the elastic restoring force of the spring, the guide rod moves upward. The guide rod simultaneously drives the pressing rod to move upward and complete the release action.

[0013] Further preferably, the bottom surface of the pressing rod is provided with a silica gel pad, and the bottom surface of the silica gel pad is provided with a plurality of spaced half-sphere protrusions; when the pressing rod moves downward, the silica gel pad is pressed on the PCB, and because the bottom surface of the silica gel pad is provided with a plurality of spaced half-sphere protrusions, the PCB and the carrier can be effectively prevented from moving after being pressed, and the surface of the PCB can be prevented from being scratched.

[0014] The PCB and the carrier are stacked and placed on the base, the PCB is above the carrier, the magnetic pressing device is manually controlled to press and fix the PCB and the carrier on the top surface of the base, the required number of screws for connecting the PCB and the carrier are placed in the screw box, the screws are manually taken out from the screw box one by one, the PCB is fixed and connected to the carrier by the screwdriver through the screws, when the screws in the screw box are used up, the magnetic pressing device is manually controlled to release the PCB and the carrier, and the PCB and the carrier can be taken out from the base at this time. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to clearly illustrate the innovative principles of the utility model and its advantages compared with the prior art, possible embodiments will be described below by means of non-limiting examples with the aid of the accompanying drawings. In the drawings:

[0016] Figure 1 It is a front view of the screw locking jig of the utility model;

[0017] Figure 2 It is a top view of Figure 1

[0018] Figure 3 It is a front view of the silica gel pad plate;

[0019] Figure 4 It is a bottom view of Figure 3

[0020] Figure 5 It is a perspective view of the magnetic pressing device;

[0021] Figure 6 It is a front view of Figure 5

[0022] Figure 7 It is a sectional view of A-A; Figure 6

[0023] Figure 8 It is a perspective view of the silica gel pad. DETAILED DESCRIPTION

[0024] ​​​​With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0025] Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0026] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0027] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiments

[0028] As Figures 1-8 A screw locking tool for mounting a PCB board, comprising a base 1, at least one magnetic force pressing device 2 is arranged on the base 1, the magnetic force pressing device 2 is suitable for pressing and fixing a PCB board 3 and a carrier 4 on the top surface of the base 1, further comprising a magnetic screwdriver 8 and a screw box 25 suitable for containing screws.

[0029] Preferably, the screw box 25 is detachably fixedly connected to the magnetic screwdriver 8; the required number of screws for connecting the PCB board 3 and the carrier 4 are placed in the screw box 25, and the screw box 25 is detachably fixedly connected to the magnetic screwdriver 8 during use, so that the screws are convenient to take and use.

[0030] Preferably, the screw box 25 is arranged on the weighing device, and the weighing device and the magnetic pressing device 2 are respectively electrically connected with the controller; in use, first, the PCB board 3 and the carrier 4 are stacked and placed on the base 1, the PCB board 3 is located above the carrier 4, the magnetic pressing device 2 is controlled by the controller to press and fix the PCB board 3 and the carrier 4 on the top surface of the base 1, a plurality of screws are placed in the screw box 25, the screws are taken out from the screw box 25 one by one by hand, the screws are used to fix and connect the PCB board 3 on the carrier 4 by the screwdriver 8, the weighing device transmits the weight signal to the controller, and the controller automatically calculates the total number of the taken-out screws according to the change of the weight measured by the weighing device; when the total number of the taken-out screws reaches the designed number of screws required for connecting the PCB board 3 and the carrier 4, the controller automatically controls the magnetic pressing device 2 to loosen the PCB board 3 and the carrier 4, and at this time, the PCB board 3 and the carrier 4 can be taken out from the base 1 together.

[0031] Preferably, the controller is a PLC, a single-chip microcomputer or a microcomputer.

[0032] Preferably, a plurality of positioning holes are formed in the base 1, a silica gel pad 23 is arranged on the top surface of the base 1, a plurality of positioning columns 24 corresponding in position to the positioning holes are arranged on the bottom surface of the silica gel pad 23, the positioning columns 24 are fixed in the positioning holes in cooperation, and the magnetic pressing device 2 is suitable for pressing and fixing the PCB board 3 and the carrier 4 on the top surface of the silica gel pad 23; since the silica gel pad 23 is made of soft and insulating material, product scratching and conduction can be prevented, and the PCB board 3 and the carrier 4 are not easy to shift after being pressed; the silica gel pad 23 can be taken off from the base 1, and different profiles and sizes of silica gel pads 23 can be replaced, that is, different specifications and sizes of the PCB board 3 and the carrier 4 can be adapted.

[0033] Preferably, the number of the positioning holes is four, the four positioning holes are distributed in a quadrilateral shape, and the positioning holes are cylindrical holes; the silica gel pad 23 is simple to install and position and is not easy to shift on the base 1.

[0034] Preferably, a plurality of strip-shaped protrusions are arranged on the top surface of the silica gel pad 23; the PCB board 3 and the carrier 4 are not easy to shift after being pressed on the top surface of the silica gel pad 23.

[0035] Preferably, the magnetic pressing device 2 is magnetically fixed on the base 1; the magnetic pressing device 2 can be magnetically fixed at any position on the top surface of the base 1, and therefore the magnetic pressing device 2 can press and fix different specifications and sizes of the PCB board 3 and the carrier 4 on the top surface of the base 1.

[0036] Preferably, the magnetic pressing device 2 comprises a bottom plate 9 arranged on the top surface of the base 1, a metal core 10 arranged on the top end of the bottom plate 9, a solenoid 11 sleeved on the metal core 10, a cylinder 12 arranged on the bottom plate 9 and sleeved on the outer side of the solenoid 11, a guide rod 13 slidingly fitted in the cylinder 12 and located above the metal core 10, a top plate 14 arranged on the top end of the guide rod 13 and located above the cylinder 12, a fixing ring 15 sleeved on the outer side of the cylinder 12, a spring 16 sleeved on the outer side of the cylinder 12 and located between the top plate 14 and the fixing ring 15, a plurality of guide holes 17 arranged on the top plate 14 and distributed in the circumferential direction, shoulder guide columns 18 slidingly fitted in the guide holes 17, shoulders 19 of the shoulder guide columns 18 located above the top plate 14, the bottom of the shoulder guide columns 18 fixed on the fixing ring 15, and a pressing rod 20 vertically arranged on one side of the top plate 14; in operation, when the solenoid 11 is powered on, a dense magnetic field is generated on the top of the metal core 10 according to the principle of current magnetic effect, the guide rod 13 moves downward and is adsorbed on the top of the metal core 10 under the action of the dense magnetic field, at this time, the spring 16 is in a compressed state, and the guide rod 13 drives the pressing rod 20 to move downward and complete a pressing action; when the solenoid 11 is powered off, the dense magnetic field generated on the top of the metal core 10 disappears, the guide rod 13 moves upward under the action of the elastic restoring force of the spring 16, and the guide rod 13 drives the pressing rod 20 to move upward and complete a releasing action.

[0037] Preferably, a silica gel pad 21 is arranged on the bottom surface of the pressing rod 20, and a plurality of hemispherical protrusions 22 are arranged on the bottom surface of the silica gel pad 21; when the pressing rod 20 moves downward, the silica gel pad 21 is pressed on the PCB board 3, and since the plurality of hemispherical protrusions 22 are arranged on the bottom surface of the silica gel pad 21, the PCB board 3 and the carrier 4 can be effectively prevented from moving after being pressed, and the surface of the PCB board 3 can be prevented from being scratched.

[0038] In use, the PCB board 3 and the carrier 4 are stacked and placed on the base 1, the PCB board 3 is located above the carrier 4, the magnetic pressing device 2 is manually controlled to press and fix the PCB board 3 and the carrier 4 on the top surface of the base 1, the required number of screws for connecting the PCB board 3 and the carrier 4 are placed in the screw box 25, the screws are manually taken out one by one from the screw box 25, the screwdriver 8 is used to fix and connect the PCB board 3 to the carrier 4 through the screws, when the screws in the screw box 25 are used up, the magnetic pressing device 2 is manually controlled to release the PCB board 3 and the carrier 4, and at this time, the PCB board 3 and the carrier 4 can be taken out from the base 1 together; therefore, the PCB board is fixed and connected to the carrier through screws by using the screw locking jig of the embodiment, and the situation of missing screws is less likely to occur.

[0039] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the ordinary in the art, without departing from the principles of the present application described under the premise, can also be made several improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A screw locking jig for mounting a PCB board, characterized by: The utility model relates to a magnetic screwdriver and screw box, comprising a base (1), wherein at least one magnetic pressing device (2) is arranged on the base (1) and is suitable for pressing and fixing a PCB (3) and a carrier (4) on the top surface of the base (1); a magnetic screwdriver (8) and a screw box (25) suitable for containing screws are further provided.

2. The screwdriver of claim 1, wherein: The screw box (25) is detachably connected to the magnetic screwdriver (8).

3. The locking screw tool of claim 1, wherein: The screw box (25) is arranged on a weighing device, and the weighing device and the magnetic pressing device (2) are electrically connected to a controller, respectively.

4. The screwdriver of claim 1, wherein: A plurality of positioning holes are arranged on the base (1), and a silica gel pad (23) is arranged on the top surface of the base (1), wherein a plurality of positioning columns (24) corresponding to the positioning holes are arranged on the bottom surface of the silica gel pad (23), the positioning columns (24) are fixed in the positioning holes, and the magnetic pressing device (2) is suitable for pressing and fixing the PCB (3) and the carrier (4) on the top surface of the silica gel pad (23).

5. The screwdriver of claim 4, wherein: The number of the positioning holes is four, and the four positioning holes are arranged in a quadrilateral shape.

6. The screwdriver of claim 4, wherein: A plurality of strip-shaped protrusions are arranged on the top surface of the silica gel pad (23) in a spaced manner.

7. The power driver of claim 1, wherein: The magnetic pressing device (2) is magnetically fixed on the base (1).

8. The power driver of claim 1, wherein: The magnetic pressing device (2) comprises a bottom plate (9) arranged on the top surface of the base (1), a metal core (10) arranged on the top end of the bottom plate (9), a solenoid (11) sleeved on the metal core (10), a cylinder (12) arranged on the outer side of the solenoid (11), a guide rod (13) slidably arranged in the cylinder (12) and located above the metal core (10), a top plate (14) arranged on the top end of the guide rod (13) and located above the cylinder (12), a fixing ring (15) sleeved on the outer side of the cylinder (12), a spring (16) sleeved on the outer side of the cylinder (12) and located between the top plate (14) and the fixing ring (15), a plurality of guide holes (17) arranged on the top plate (14) in a circumferential direction, a shoulder guide column (18) slidably arranged in the guide holes (17), a shoulder (19) of the shoulder guide column (18) located above the top plate (14), a bottom portion of the shoulder guide column (18) fixed on the fixing ring (15), and a pressing rod (20) vertically arranged on one side of the top plate (14).

9. The power tool of claim 8, wherein: A silica gel pad (21) is arranged on the bottom surface of the pressing rod (20), and a plurality of hemispherical protrusions (22) are arranged on the bottom surface of the silica gel pad (21) in a spaced manner.

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