Flexible fixing clamp for liquid crystal display screen detection

Abstract

The utility model discloses a flexible fixing clamp for detecting a liquid crystal display screen. The flexible fixing clamp comprises a side plate, a fixing assembly is arranged between the two side plates and comprises an outer frame, a double-thread screw is rotationally connected to one side of the interior of the outer frame, a threaded sleeve is connected to the double-thread screw, a mounting plate is fixedly connected to the threaded sleeve, a moving plate is mounted on the side edge of the mounting plate, a bottom supporting plate is fixed to the bottom of the moving plate, and a clamping groove is formed in the bottom of the bottom supporting plate. A side baffle is fixed to the side edge of the supporting bottom plate, and a sponge cushion is arranged above the supporting bottom plate. Wherein first springs are symmetrically fixed to one side of the movable plate, and a pressure sensor is fixed to the surface of the mounting plate; through the pressure sensor and the first spring, extrusion force borne by the display screen is controllable, so that the display screen is prevented from being damaged due to large pressure, and the display screen can be conveniently placed through the supporting bottom plate and the side baffles.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display screen testing technology, specifically a flexible fixing clip for liquid crystal display screen testing. Background Technology

[0002] The liquid crystal solution in two polarizing materials is used in the LCD screen. When an electric current passes through the liquid, the crystals will rearrange to achieve the purpose of imaging. After the LCD screen is manufactured, it must be tested because the LCD screen itself is relatively fragile. If it is clamped directly by a fixture driven by electronic components, it is very likely to be damaged due to excessive clamping force.

[0003] Authorization announcement number CN213457584U discloses a fixing fixture for testing liquid crystal displays, including an operation panel. Clamps are mounted opposite each other on both sides of the operation panel. Each clamp includes an electric lifting frame, with a fixing plate welded to the top of the electric lifting frame. An L-shaped plate is welded to the bottom of the fixing plate. A bearing is sleeved on one side of the L-shaped plate, and a rotating rod is welded to the inner ring of the bearing. A worm gear is sleeved on the rotating rod. A worm is rotatably connected to one side of the fixing plate, and the bottom of the worm gear is rotatably connected to the outer wall of the L-shaped plate. This device uses a housing, support legs, and a sponge pad to protect the liquid crystal display area clamped by the clamp. A drawer in the housing stores some testing instruments, and the support legs support the entire fixture, reducing fatigue during testing and protecting the operator's body. Compared to traditional methods, it improves testing efficiency and protects the liquid crystal display itself. However, this patent still has the following problems in actual use:

[0004] The clamps of the aforementioned device are U-shaped, which means that the display screen needs to be accurately snapped into the clamps each time it is placed, making the operation inconvenient. Although the device uses movable clamps to effectively compress the display screen and prevent it from sliding, the sponge pads can only prevent the edges of the display screen from being damaged due to rigid contact. However, if the clamping force is too great and the display screen is subjected to excessive pressure, the display screen may still be damaged.

[0005] A flexible clamp for testing liquid crystal displays is proposed to address the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a flexible fixing clamp for testing liquid crystal displays, so as to solve the problem that the clamp of the device mentioned in the background art is U-shaped, which makes it inconvenient to accurately clamp the display into the clamp every time the display is placed. In addition, although the device uses a movable clamp to effectively compress the display and prevent the display from sliding, the sponge pad can only prevent the edge of the display from being damaged due to rigid contact. However, when the clamping force is too large, the display may still be damaged if it is subjected to excessive pressure.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a flexible fixing clip for detecting liquid crystal displays, comprising a base and side plates symmetrically fixed on both sides of the top surface of the base;

[0008] A fixing assembly is provided between the two side plates. The fixing assembly includes an outer frame. A double-ended screw is rotatably connected to one side of the inner side of the outer frame, and a crossbar is fixedly connected to the other side of the inner side of the outer frame. A threaded sleeve is symmetrically threaded and slidably connected to the double-ended screw. A sliding sleeve is symmetrically slidably connected to the crossbar. An installation plate is fixedly connected between the sliding sleeve and the threaded sleeve on the same side. A movable plate is slidably installed on the side of the installation plate. A bottom support plate is fixedly connected to the bottom of both sides of the movable plate. A side baffle is fixedly connected to the side of the bottom support plate. A sponge pad is fixed to the surface of the movable plate above the bottom support plate.

[0009] The movable plate is symmetrically and fixedly connected to a first spring on the side near the mounting plate, and a pressure sensor is fixedly connected to the other end of the first spring. The pressure sensor is fixedly installed on the surface of the mounting plate.

[0010] One of the side plates has a rotating assembly on its outer side.

[0011] Preferably, the four corners of the movable plate are fixedly connected with connecting rods, and the connecting rods are slidably connected to the mounting plate.

[0012] Preferably, a side shaft is fixedly connected to the middle of both sides of the outer frame, and the side shaft is rotatably connected to the side plate.

[0013] Preferably, a first motor is fixedly connected to the outer side of the outer frame, and the output end of the first motor passes through the outer frame and is fixedly connected to a double-ended screw.

[0014] Preferably, the rotating assembly includes a first gear fixedly connected to one end of a side shaft, a rack meshing with the bottom of the first gear, and a mounting block fixedly connected to the end of the rack.

[0015] Preferably, a positioning pin is slidably connected through the middle of the mounting block, and a pull ring is fixedly connected to the end of the positioning pin away from the side plate. A second spring is provided between the pull ring and the mounting block, and the second spring is sleeved outside the positioning pin. The rack is slidably connected to the side shaft.

[0016] Preferably, the rack is slidably connected to the side plate, and the side plate has two positioning holes, which are inserted into positioning pins.

[0017] Compared with the prior art, the beneficial effects of this utility model are: this flexible fixing clamp for LCD screen detection, through a pressure sensor and a first spring, ensures that the display screen is clamped and the compressive force it bears is within a tolerable range, preventing damage to the display screen due to excessive pressure. Furthermore, the base plate and side baffles facilitate the placement of the display screen. The specific details are as follows:

[0018] 1. By placing the display screen on the base plate and having one side of the display screen abut against the side panel near the front, the first motor causes the moving plate to approach and abut against the display screen again. As the moving plate contacts the display screen, the mounting plate continues to move, bringing the mounting plate and the moving plate closer together. This causes the first spring to contract, increasing the pressure on the pressure sensor. When the pressure sensor detects a preset pressure value, it sends a signal to the first motor to stop it. At this point, the display screen is clamped and the compressive force is within a tolerable range, allowing the display screen to be quickly placed and fixed, and preventing damage to the display screen due to excessive pressure.

[0019] 2. By pulling the pull ring to remove it from one of the positioning holes, the mounting block is pulled to make the rack slide, and the first gear drives the side shaft to rotate, thereby rotating the outer frame from a horizontal state to a vertical state, so that the display screen can quickly rotate to a vertical state and maintain a vertical state for testing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front cross-section structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the outer frame structure;

[0022] Figure 3 for Figure 2 Enlarged structural diagram at point B;

[0023] Figure 4 A schematic diagram of the mounting structure of the first gear and rack;

[0024] Figure 5 for Figure 1 A magnified structural diagram of point A in the middle.

[0025] In the diagram: 1. Base; 101. Side plate; 2. Fixing assembly; 201. Outer frame; 202. Side shaft; 203. Double-ended screw; 204. Threaded sleeve; 205. Crossbar; 206. Sliding sleeve; 207. Mounting plate; 208. Moving plate; 209. Base plate; 210. Side baffle; 211. Sponge pad; 212. Connecting rod; 213. First spring; 214. Pressure sensor; 215. First motor; 3. Rotating assembly; 301. First gear; 302. Rack; 303. Mounting block; 304. Positioning pin; 305. Pull ring; 306. Second spring; 307. Positioning hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 The present invention provides a technical solution: a flexible fixing clip for testing liquid crystal displays, including a base 1 and side plates 101 symmetrically fixed on both sides of the top surface of the base 1;

[0028] A fixing component 2 is provided between the two side plates 101. The fixing component 2 includes an outer frame 201. A double-ended screw 203 is rotatably connected to one side of the inner side of the outer frame 201, and a crossbar 205 is fixedly connected to the other side of the inner side of the outer frame 201. A threaded sleeve 204 is symmetrically threaded and slidably connected to the double-ended screw 203, and a sliding sleeve 206 is symmetrically slidably connected to the crossbar 205. An installation plate 207 is fixedly connected between the sliding sleeve 206 and the threaded sleeve 204 on the same side. A movable plate 208 is slidably installed on the side of the installation plate 207. A bottom support plate 209 is fixedly connected to the bottom of both sides of the movable plate 208. A side baffle 210 is fixedly connected to the side of the bottom support plate 209. A sponge pad 211 is fixed to the surface of the movable plate 208 above the bottom support plate 209. The sponge pad 211 is adhered to the surface of the movable plate 208 and can be removed and replaced by pulling.

[0029] The movable plate 208 is symmetrically and fixedly connected to a first spring 213 on the side near the mounting plate 207. The other end of the first spring 213 is fixedly connected to a pressure sensor 214, which is fixedly mounted on the surface of the mounting plate 207. The first spring 213 can ensure that the movable plate 208 and the mounting plate 207 move synchronously in a non-clamped state. The pressure sensor 214 is existing technology and can be preset with corresponding values ​​to send signals.

[0030] One of the side plates 101 has a rotating assembly 3 on its outer side.

[0031] Connecting rods 212 are fixedly connected to the four corners of the movable plate 208, and the connecting rods 212 are slidably connected to the mounting plate 207; the connecting rods 212 enable the movable plate 208 to move stably.

[0032] Side shafts 202 are fixedly connected to the middle of both sides of the outer frame 201. The side shafts 202 are rotatably connected to the side plate 101, and one side shaft 202 passes through the side plate 101.

[0033] A first motor 215 is fixedly connected to the outer side of the outer frame 201. The output end of the first motor 215 passes through the outer frame 201 and is fixedly connected to the double-headed screw 203. The first motor 215 is a servo motor and can receive signals from the pressure sensor 214.

[0034] The rotating assembly 3 includes a first gear 301 fixedly connected to one end of the side shaft 202, a rack 302 meshing with the bottom of the first gear 301, and a mounting block 303 fixedly connected to the end of the rack 302.

[0035] A positioning pin 304 is slidably connected through the middle of the mounting block 303. A pull ring 305 is fixedly connected to the end of the positioning pin 304 away from the side plate 101. A second spring 306 is provided between the pull ring 305 and the mounting block 303. The second spring 306 is sleeved on the outside of the positioning pin 304. The rack 302 is slidably connected to the side shaft 202. The second spring 306 will pull the positioning pin 304 to be inserted into the positioning hole 307. When the rack 302 moves a distance equal to the distance between the two positioning holes 307, the rack 302 will drive the first gear 301 to rotate 90 degrees.

[0036] The rack 302 is slidably connected to the side plate 101. Two positioning holes 307 are provided on the side plate 101, and the positioning holes 307 are inserted into the positioning pins 304.

[0037] Working principle: Before using this type of flexible clamp for LCD screen testing, it is necessary to check the overall condition of the device to ensure it can operate normally. Figure 1 - Figure 5As shown, the first motor 215 is first started to rotate the double-headed screw 203, thereby using the threaded sleeve 204, mounting plate 207 and sliding sleeve 206 to move the moving plate 208 until both sides of the display screen can be placed on the base plate 209 and one side of the display screen is in contact with the side baffle 210 near the front. At this time, the first motor 215 is started again to make the moving plate 208 approach and contact the display screen again. As the moving plate 208 contacts the display screen, the mounting plate 207 continues to move, making the mounting plate 207 and the moving plate 208 approach each other. As a result, when the first spring 213 contracts, the pressure sensor 214 receives increased pressure. When the pressure sensor 214 senses the pressure to reach a preset value, it will send a signal to the first motor 215 to stop it. At this time, the display screen is clamped and the compressive force is within the acceptable range.

[0038] After pulling the pull ring 305 outward to remove it from the positioning hole 307, pulling the mounting block 303 causes the rack 302 to slide, and the first gear 301 drives the side shaft 202 to rotate, thereby rotating the outer frame 201 from a horizontal state to a vertical state, so that the display screen can maintain a vertical state for detection.

[0039] After the pull ring 305 is released, the second spring 306 will pull the positioning pin 304 to engage with another positioning hole 307, ultimately keeping the outer frame 201 in a vertical position.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexible fixing clip for testing a liquid crystal display screen, comprising a base (1) and side plates (101) symmetrically fixed on both sides of the top surface of the base (1); Its features are, Also includes: A fixing assembly (2) is provided between the two side plates (101). The fixing assembly (2) includes an outer frame (201). A double-ended screw (203) is rotatably connected to one side of the inner side of the outer frame (201), and a crossbar (205) is fixedly connected to the other side of the inner side of the outer frame (201). A threaded sleeve (204) is symmetrically threaded and slidably connected to the double-ended screw (203), and a sliding sleeve (206) is symmetrically slidably connected to the crossbar (205). A mounting plate (207) is fixedly connected between the sliding sleeve (206) and the threaded sleeve (204) on the side. A movable plate (208) is slidably mounted on the side of the mounting plate (207). A bottom support plate (209) is fixedly connected to the bottom of both sides of the movable plate (208). A side baffle (210) is fixedly connected to the side of the bottom support plate (209). A sponge pad (211) fixed to the surface of the movable plate (208) is provided above the bottom support plate (209). Among them, the movable plate (208) is symmetrically fixedly connected to a first spring (213) on one side near the mounting plate (207), and a pressure sensor (214) is fixedly connected to the other end of the first spring (213). The pressure sensor (214) is fixedly installed on the surface of the mounting plate (207). A rotating assembly (3) is provided on the outer side of one of the side plates (101).

2. The flexible fixing clip for testing a liquid crystal display screen according to claim 1, characterized in that: Connecting rods (212) are fixedly connected to the four corners of the movable plate (208), and the connecting rods (212) are slidably connected to the mounting plate (207).

3. The flexible fixing clip for testing a liquid crystal display screen according to claim 2, characterized in that: Side shafts (202) are fixedly connected to the middle of both sides of the outer frame (201), and the side shafts (202) are rotatably connected to the side plate (101).

4. The flexible fixing clip for testing a liquid crystal display screen according to claim 1, characterized in that: A first motor (215) is fixedly connected to the outside of the outer frame (201). The output end of the first motor (215) passes through the outer frame (201) and is fixedly connected to the double-headed screw (203).

5. The flexible fixing clip for testing a liquid crystal display screen according to claim 1, characterized in that: The rotating assembly (3) includes a first gear (301) fixedly connected to one end of a side shaft (202), a rack (302) meshing with the bottom of the first gear (301), and a mounting block (303) fixedly connected to the end of the rack (302).

6. The flexible fixing clip for testing a liquid crystal display screen according to claim 5, characterized in that: A positioning pin (304) is slidably connected through the middle of the mounting block (303). A pull ring (305) is fixedly connected to one end of the positioning pin (304) away from the side plate (101). A second spring (306) is provided between the pull ring (305) and the mounting block (303). The second spring (306) is sleeved on the outside of the positioning pin (304). The rack (302) is slidably connected to the side shaft (202).

7. The flexible fixing clip for testing a liquid crystal display screen according to claim 5, characterized in that: The rack (302) is slidably connected to the side plate (101), and the side plate (101) has two positioning holes (307), which are inserted into the positioning pins (304).

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