Screw locking device for PCB installation
By designing an automated screw-locking device, the problems of easy omissions and high inspection costs associated with manual screw-locking were solved, achieving accurate screw fixing and stable PCB board connection.
Patent Information
- Application Number
- CN202520272492.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Manual screw tightening is prone to omissions, and optical inspection equipment is expensive and prone to errors, resulting in unstable connection between the PCB board and the carrier.
A screw-locking device was designed, comprising a base, a silicone pad, a clamping device, a screw feeder, and a screw counter. The screw supply and clamping actions are automatically controlled by a controller to ensure accurate screw quantity and prevent missed screws.
It automates the screw fastening process, reduces missed screws, lowers inspection costs and error rates, and is adaptable to PCB boards and carriers of different specifications.
Smart Images
Figure CN223685342U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screw locking device technical field, specifically relate to a screw locking device for PCB board installation. BACKGROUND
[0002] The liquid crystal display module includes a PCB board and a carrier, when producing and assembling, the PCB board needs to be fixedly connected on the carrier by a screw through a screwdriver, the carrier is a backlight plate or a support, and the screw locking by manual work is prone to missing locking, therefore, after the PCB board is fixedly connected on the carrier by the screw through the screwdriver, the number of screw connections between the PCB board and the carrier needs to be detected by an optical detection device, the cost of the optical detection device is high, and the detection result is still prone to error. SUMMARY
[0003] The utility model solves the technical problem that the screw locking device for PCB board installation is used to fix the PCB board on the carrier through a screw, and missing screw locking is not prone to occur.
[0004] To solve the above technical problem, the utility model provides a screw locking device for PCB board installation, which comprises a base, a plurality of positioning holes are formed in the base, a silica gel pad is arranged on the top surface of the base, a plurality of positioning columns corresponding to the positioning holes in number and position are arranged on the bottom surface of the silica gel pad, the positioning columns are fixed in the positioning holes, at least one pressing device is arranged on the base, the pressing device is suitable for pressing and fixing the PCB board and the carrier on the top surface of the silica gel pad, and the screw feeder is further provided, a screw counter is connected in series on the nail blowing pipe of the screw feeder, and the screw feeder, the pressing device and the screw counter are electrically connected with the controller.
[0005] Further preferably, the controller is a PLC, a single-chip microcomputer or a microcomputer.
[0006] 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 prone to move on the base.
[0007] Further preferably, a plurality of strip-shaped protrusions are arranged on the top surface of the silica gel pad in a spaced distribution; the PCB board and the carrier are not prone to move after being pressed on the top surface of the silica gel pad.
[0008] Further preferably, a digital display screen is arranged on the screw counter; the user can conveniently know the number of screws supplied by the screw feeder through the digital display screen.
[0009] Further preferably, the pressing device is magnetically attracted and fixed to the base; the pressing device can be magnetically attracted and fixed to any position on the top surface of the base, so that the pressing device can press and fix PCB boards and carriers of different sizes on the top surface of the silica gel pad.
[0010] Further preferably, the pressing device comprises a bottom plate arranged on the top surface of the base, a magnet is embedded on the bottom surface of the bottom plate, a metal core is arranged at the top end of the bottom plate, a solenoid is sleeved on the metal core, a cylinder is arranged on the bottom plate and sleeved on the outer side of the solenoid, a guide rod is slidingly fitted in the cylinder and located above the metal core, a top plate is arranged at the top end of the guide rod and located above the cylinder, a fixing ring is sleeved on the outer side of the cylinder, a spring is sleeved on the outer side of the cylinder and located between the top plate and the fixing ring, a plurality of guide holes are arranged on the top plate and distributed in the circumferential direction, a shoulder guide column is slidingly fitted in the guide hole and the shoulder of the shoulder guide column is located above the top plate, the bottom of the shoulder guide column is fixed on the fixing ring, and a pressing rod is vertically arranged on one side of the top plate; in operation, the energization and de-energization of the solenoid can be controlled by the controller; when the solenoid is energized, a dense magnetic field is generated at the top of the metal core according to the principle of current magnetic effect, the guide rod moves downward and is attracted to the top of the metal core under the action of the dense magnetic field, at this time the spring is in a compressed state, and the guide rod moves downward at the same time, the pressing rod moves downward and completes the pressing action; when the solenoid is de-energized, the dense magnetic field generated at the top of the metal core disappears, the guide rod moves upward under the action of the elastic restoring force of the spring, and the guide rod moves upward at the same time, the pressing rod moves upward and completes the releasing action.
[0011] Further preferably, a silica gel pad is arranged on the bottom surface of the pressing rod, and a plurality of hemispherical protrusions are arranged on the bottom surface of the silica gel pad; when the pressing rod moves downward, the silica gel pad is pressed on the PCB board, and since the plurality of hemispherical protrusions are arranged on the bottom surface of the silica gel pad, the PCB board and the carrier can be effectively prevented from moving after being pressed, and the surface of the PCB board can be prevented from being scratched.
[0012] The beneficial effects of this utility model are as follows: In use, the PCB board and the carrier are first stacked one on top of the other and placed on a silicone pad, with the PCB board on top of the carrier. The operator manually controls the clamping device via a controller to press and fix the PCB board and carrier onto the top surface of the silicone pad. The controller automatically controls the screw feeder to supply screws one by one, and a screw counter is used to calculate the total number of screws supplied. The operator uses a screwdriver to fix the PCB board to the carrier using the supplied screws. When the total number of screws counted by the screw counter reaches the designed number of screws required to connect the PCB board and the carrier, the screw counter sends an electrical signal to the controller, which automatically controls the clamping device to release the PCB board and the carrier. At this point, the PCB board and the carrier can be removed from the silicone pad together. Because the silicone pad is a soft insulating material, it can prevent the product from being scratched and conductive. The PCB board and the carrier are not easily moved after being pressed. The silicone pad can be removed from the base and replaced with silicone pads of different contours and sizes, thus adapting to support PCB boards and carriers of different sizes. Using this new screw-locking device to fix the PCB board to the carrier with screws reduces the likelihood of missing screws. Attached Figure Description
[0013] To clearly illustrate the innovative principle of this utility model and its advantages over existing screw-locking devices, possible embodiments are described below with the aid of accompanying drawings through non-limiting examples applying the stated principle. In the drawings:
[0014] Figure 1 This is a front view of the screw-locking device of this utility model;
[0015] Figure 2 for Figure 1 Top view;
[0016] Figure 3 This is a front view of the silicone pad.
[0017] Figure 4 for Figure 3 A bottom view;
[0018] Figure 5 A perspective view of the clamping device;
[0019] Figure 6 for Figure 5 The main view;
[0020] Figure 7 for Figure 6 Sectional view at AA;
[0021] Figure 8 This is a three-dimensional view of the silicone pad. Detailed Implementation
[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.
[0023] Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0024] 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.
[0025] 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
[0026] As Figures 1-8 A screw locking device for mounting a PCB board comprises a base 1, 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, at least one pressing device 2 is arranged on the base 1, the pressing device 2 is suitable for pressing and fixing a PCB board 3 and a carrier 4 on the top surface of the silica gel pad 23, and a screw feeder is further arranged, a screw counter 6 is connected in series on the nail blowing pipe 5 of the screw feeder, and the screw feeder, the pressing device 2 and the screw counter 6 are electrically connected with a controller respectively.
[0027] Preferably, the controller is a PLC, a single-chip microcomputer or a microcomputer.
[0028] 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 move on the base 1.
[0029] Preferably, a plurality of strip-shaped protrusions are arranged on the top surface of the silica gel pad 23 in a spaced distribution; the PCB board 3 and the carrier 4 are not easy to move after being pressed on the top surface of the silica gel pad 23.
[0030] Preferably, the screw counter 6 is provided with a digital display screen 7; the user can conveniently know the number of screws supplied by the screw feeder through the digital display screen 7.
[0031] Preferably, the pressing device 2 is magnetically fixed on the base 1; the pressing device 2 can be magnetically fixed on any position on the top surface of the base 1, so that the pressing device 2 can tightly fix the PCB board 3 and the carrier 4 on the top surface of the silica gel pad 23.
[0032] Preferably, the pressing device 2 comprises a bottom plate 9 arranged on the top surface of the base 1, a magnet is embedded on the bottom surface of the bottom plate 9, a metal core 10 is arranged on the top end of the bottom plate 9, a solenoid 11 is sleeved on the metal core 10, a cylinder 12 is arranged on the outer side of the solenoid 11, a guide rod 13 is slidingly fitted in the cylinder 12 and located above the metal core 10, a top plate 14 is arranged on the top end of the guide rod 13 and located above the cylinder 12, a fixing ring 15 is sleeved on the outer side of the cylinder 12, a spring 16 is 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 are arranged on the top plate 14 and distributed in the circumferential direction, a shoulder guide column 18 is slidingly fitted in the guide hole 17, the shoulder 19 of the shoulder guide column 18 is located above the top plate 14, the bottom of the shoulder guide column 18 is fixed on the fixing ring 15, and a pressing rod 20 is vertically arranged on one side of the top plate 14; in operation, the solenoid 11 can be controlled to be powered on or powered off by the controller; 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 the 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 the releasing action.
[0033] Preferably, the bottom surface of the pressing rod 20 is provided with a silica gel pad 21, 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 tightly 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 tightly pressed, and the surface of the PCB board 3 can be prevented from being scratched.
[0034] In use, first, the PCB 3 and the carrier 4 are stacked and placed on the silica gel pad 23, the PCB 3 is located above the carrier 4, the controller is manually controlled to control the pressing device 2 to press and fix the PCB 3 and the carrier 4 on the top surface of the silica gel pad 23, the controller automatically controls the screw feeder to supply screws one by one, the screw counter 6 is used to count the total number of supplied screws, the screwdriver 8 is manually used to fix and connect the PCB 3 on the carrier 4 through the supplied screws, when the total number of screws counted by the screw counter 6 reaches the designed number of screws required for connecting the PCB 3 and the carrier 4, the screw counter 6 sends an electric signal to the controller, the controller automatically controls the pressing device 2 to loosen the PCB 3 and the carrier 4, at this time, the PCB 3 and the carrier 4 can be taken out from the silica gel pad 23 together; since the silica gel pad 23 is a soft insulating material, it can prevent product scratching and conduction, and the PCB 3 and the carrier 4 are not easy to move 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 PCBs 3 and carriers 4 can be adapted; therefore, the screw locking device of the embodiment is used to fix and connect the PCB on the carrier through screws, and the situation of missing locking screws is not easy to occur.
[0035] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.
Claims
1. A screw locking device for mounting a PCB board, characterized by: The application relates to a screw feeding device, which comprises a base (1) provided with a plurality of positioning holes, a silica gel pad (23) arranged on the top surface of the base (1), positioning columns (24) corresponding to the positioning holes in number and position and arranged on the bottom surface of the silica gel pad (23), the positioning columns (24) being fixed in the positioning holes, at least one pressing device (2) arranged on the base (1) and adapted to press and fix a PCB (3) and a carrier (4) on the top surface of the silica gel pad (23), and a screw feeder, wherein a screw counter (6) is connected in series on the blowing pipe (5) of the screw feeder, and the screw feeder, the pressing device (2) and the screw counter (6) are electrically connected with a controller respectively.
2. The screw locking device of claim 1, wherein: The positioning holes are four in number and are arranged in a quadrilateral shape.
3. The screw locking device of claim 1, wherein: A plurality of strip-shaped protrusions are arranged on the top surface of the silica gel pad (23) in a spaced distribution.
4. The screw locking device of claim 1, wherein: A digital display screen (7) is arranged on the screw counter (6).
5. The screw locking device of claim 1, wherein: The pressing device (2) is magnetically fixed on the base (1).
6. The screw locking device of claim 1, wherein: The pressing device (2) comprises a bottom plate (9) arranged on the top surface of the base (1), a magnet embedded on the bottom surface of the bottom plate (9), 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) 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 in a circumferential distribution on the top plate (14), a shoulder guide column (18) slidingly fitted in the guide holes (17), a shoulder (19) of the shoulder guide column (18) being located above the top plate (14), the bottom of the shoulder guide column (18) being fixed on the fixing ring (15), and a pressing rod (20) vertically arranged on one side of the top plate (14).
7. The screw locking device of claim 6, 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).