Damage-prevention key pressing tool

Abstract

The utility model discloses an anti-damage key pressing tool which comprises an upper die, a middle die and a lower die, a plurality of keycap grooves matched with keycaps in size are formed in the middle die, a bottom hole is formed in the bottom of each keycap groove, upper bosses are arranged at the positions, corresponding to the keycap grooves, of the upper die, scissor foot pressing points are arranged on the same side of each upper boss, and the scissor foot pressing points are matched with the keycap grooves. The lower die is provided with lower bosses corresponding to the bottom holes, the size of each lower boss is in clearance fit with the size of the corresponding bottom hole, and the top of each lower boss is inserted into the corresponding bottom hole and can enter the corresponding keycap groove through the bottom hole. Each lower boss is provided with a single-side spring ejection structure, and the installation positions of the single-side spring ejection structures and the corresponding ejector pin grooves formed in the upper bosses are located on the same side. By means of the mode, the rejection rate of the key pressing procedure can be remarkably reduced, and the overall production efficiency of a production line is improved.

Description

Technical Field

[0001] This utility model relates to the field of computer production equipment, and in particular to a damage-resistant key press tool. Background Technology

[0002] Keyboard pressing is a step in keyboard assembly. This process inserts the scissor-switch leads into the keycaps. Currently, the key pressing process typically involves mounting the scissor-switch leads onto a dedicated keypress plate, placing the plate on a mold with the corresponding keycap position, closing the mold, and pressing the scissor-switch leads into the keycap. Due to the characteristics of the scissor-switch structure, there is usually a 0.3~0.4mm interference between the scissor-switch leads and the corresponding groove on the keycap in actual design. Directly closing the mold often results in the scissor-switch leads failing to fit into the groove, leading to damage. To address this issue, some molds now have protrusions on one side of the upper mold corresponding to the keycap position. This reduces the interference through uneven force during pressing. While this method has some effect in practice, the improvement is not ideal, and further improvements to the mold structure and the yield rate after mold closing are needed. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a damage-resistant key pressing tool that can significantly reduce the damage rate of the key pressing process and increase the amount of raw material waste.

[0004] To solve the above-mentioned technical problems, the present invention provides a keycap anti-damage pressing fixture, which includes an upper mold, a middle mold, and a lower mold. The middle mold has multiple keycap slots that match the keycap size, and each keycap slot has a bottom hole. The upper mold has upper bosses corresponding to the keycap slots, and each upper boss has a scissor foot pressing point on one side and an ejector pin slot on the opposite side. A spring ejector pin is installed in the ejector pin slot. The lower mold has lower bosses corresponding to the bottom holes, and the size of the lower bosses is clearance-fitted with the size of the corresponding bottom holes. The top of the lower bosses is inserted into the corresponding bottom holes and can enter the corresponding keycap slots through the bottom holes. Each lower boss has a single-sided spring ejection structure, and the installation position of the single-sided spring ejection structure is on the same side as the ejector pin slot on the corresponding upper boss. When the keycap is placed in the keycap slot, one side rests on the ejection part of the single-sided spring ejection structure, making the whole structure tilted.

[0005] In a preferred embodiment of this utility model, the keycap is tilted at an angle of 15~45° when placed in the keycap slot.

[0006] In a preferred embodiment of this utility model, the single-sided spring ejection structure includes a push rod and a spring. The lower boss is provided with a through hole for the push rod to eject, the through hole penetrating the entire body of the lower boss. A spring groove is provided directly below the through hole, the diameter of the spring groove being larger than the size of the through hole. The push rod body is inserted into the through hole, the rod head enters the keycap groove, and the rod tail extends into the spring groove. The spring is installed between the rod tail and the bottom of the groove, and the size of the rod tail is larger than the size of the through hole.

[0007] In a preferred embodiment of this utility model, a buffer pad is installed on the top of the lower boss.

[0008] In a preferred embodiment of this utility model, there are two ejector pin grooves on the upper boss, which are symmetrically arranged about the center line of the upper boss.

[0009] In a preferred embodiment of this utility model, there are two sets of single-sided spring ejection structures arranged on the lower boss, which are symmetrically arranged about the center line of the lower boss.

[0010] The beneficial effects of this utility model are as follows: This utility model improves the force by adding or removing spring pins on the upper mold and changing the posture of the keycap when pressing the key. This allows the scissor pins to enter the corresponding groove inside the keycap in an inclined posture relative to the keycap when pressing the key, thereby effectively avoiding the influence of dimensional interference caused by design reasons. In actual use, the scrap rate of keycaps during the key pressing process is significantly reduced, which effectively improves the production efficiency of the production line. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of the upper boss structure of the upper mold in the embodiment described above;

[0013] Figure 3 This is a schematic diagram of the key pressing action of the upper boss in the embodiment described above;

[0014] The components in the attached diagram are labeled as follows:

[0015] 1. Keycaps, 2. Keyplate, 3. Upper mold, 4. Middle mold, 5. Lower mold;

[0016] 301. Upper boss; 302. Ejector pin groove; 303. Spring ejector pin; 304. Pressing point;

[0017] 401. Keycap slot; 402. Bottom hole;

[0018] 501. Spring, 502. Top rod, 503. Silicone buffer pad, 504. Stop block, 505. Spring groove, 506. Lower boss, 507. Rubber pad positioning groove. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0020] Please see Figures 1 to 3 This utility model embodiment includes: a keycap anti-damage tooling, the keycap anti-damage tooling including: an upper mold 3, a middle mold 4, and a lower mold 5. The middle mold 4 has multiple keycap grooves 401 that match the size of the keycap 1. Each keycap groove 401 has a bottom hole 402. The upper mold 3 has upper bosses 301 at positions corresponding to the keycap grooves 401. Each upper boss 301 has two scissor foot pressing points 304 on the same side and two ejector pin grooves 302 on the opposite side. The two ejector pin grooves 302 and the two scissor foot pressing points 304 are symmetrically arranged about the center line of the upper boss. Each ejector pin groove 302 is equipped with a spring ejector pin 303. The lower mold 5 is corresponding to... Each of the bottom holes 402 is provided with a lower boss 506. The size of the lower boss 506 is fitted with the size of the corresponding bottom hole 402. The top of the lower boss 506 is inserted into the corresponding bottom hole 402 and can enter the corresponding keycap slot 401 through the bottom hole 402. Each lower boss 506 is provided with a spring ejection structure. There are two sets of spring ejection structures symmetrically arranged about the center line of the lower boss 506. The installation position of the two sets of spring ejection structures is on the same side as the two ejector pin slots 302 provided on the corresponding upper boss 301. When the keycap 1 is placed in the keycap slot 401, one side rests on the ejection part of the spring ejection structure, making the whole body tilted. The tilt angle of the keycap 1 when placed in the keycap slot 401 is 15~45°, and it is generally 30° in practice. The reason for choosing the above tilt angle is that if the tilt angle is too small, it is not easy to eliminate the influence of interference. If it is too large, it is easier to damage the edge of the keycap 1 when pressing down.

[0021] The single-sided spring ejection structure includes a push rod 502 and a spring 501. The lower boss 506 has a through hole for the push rod 502 to eject. The through hole passes through the entire platform of the lower boss 506. The lower mold 5 directly below the through hole has a two-section through hole. One section of the two-section through hole is connected to the through hole, and the other section is connected to the bottom surface of the lower mold. A stop block is inserted into the section connected to the bottom surface of the lower mold. The top of the stop block and the other section together form a spring groove 505. The diameter of the spring groove 505 is larger than the size of the through hole. The push rod 502 is inserted into the through hole, the rod head enters the keycap groove 401, and the rod tail extends into the spring groove 505. The spring 501 is installed between the rod tail and the bottom of the groove. The size of the rod tail is larger than the size of the through hole. In this way, when the keycap is installed, the tip of the push rod 502 can tilt to support the keycap 1. When the mold is closed, the lower boss 506 can move upward relative to the push rod 502 to lift the keycap as a whole, thus completing the key pressing action.

[0022] The lower boss 506 has a rubber pad positioning groove 507 on its top. Based on the rubber pad positioning groove 507, a silicone buffer pad 503 is installed on the top of the lower boss 506. The purpose of installing the silicone buffer pad 503 is to prevent the top of the lower boss 506 from abutting against the keycap 1 and damaging the keycap when the key is pressed.

[0023] The working principle of this utility model is as follows:

[0024] During key assembly, the keycaps 1 are first installed into the corresponding keycap slots 401. Then, the special key press plate 2 with the scissor feet installed is placed between the middle mold 4 and the upper mold 5. The scissor feet on the key press plate 2 correspond one-to-one with the keycaps 1. Then, the mold is closed. During the mold closing process, the upper boss 301 presses against the back of the key press plate 2, and the lower boss 506 presses against the back of the keycap 1, so that the scissor feet are inserted into the keycap 1. During the process of inserting the scissor feet into the keycap 1, the upper spring ejector pin 303 will first press against one side of the back of the corresponding scissor feet. When pressing down, the keycap 1 is tilted to one side by the spring ejector pin under the action of the ejector rod 502. In this way, the scissor foot structure at the corresponding position of the spring ejector pin will first contact the keycap 1 on that side and be inserted into the corresponding preset groove on the keycap 1 at an angle. Then, the lower mold 5 presses towards the middle, causing the lower boss 506 to rise as a whole, lifting the other side of the keycap 1 upward as well, so that all the scissor feet are finally inserted into the corresponding keycap 1. In this way, under the combined action of the spring pin 303 and the push rod 502, the scissor feet can be pressed into the corresponding groove on the keycap 1 at a relatively inclined angle, thereby effectively avoiding the influence of the interference between the groove and the scissor feet caused by the original design dimensions on the assembly action, avoiding damage when the scissor feet enter the groove, and improving the assembly quality.

[0025] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A crush protection keying tool, characterized in that, The anti-damage key cap tool comprises an upper die, a middle die and a lower die, the middle die is provided with a plurality of key cap grooves matching the size of key caps, each key cap groove is provided with a bottom hole at the bottom, the upper die is provided with an upper boss at the position corresponding to the key cap groove, each upper boss is provided with a shear foot pressing point at the same side and a thimble groove at the opposite side, the thimble groove is provided with a spring thimble, the lower die is provided with a lower boss at the position corresponding to the bottom hole, the size of the lower boss is matched with the size of the corresponding bottom hole, the top of the lower boss is inserted into the corresponding bottom hole, the corresponding key cap groove can be accessed through the bottom hole, the lower boss is provided with a one-sided spring ejection structure, the installation position of the one-sided spring ejection structure is the same side as the thimble groove provided on the corresponding upper boss, when the key cap is placed in the key cap groove, one side leans on the ejection part of the one-sided spring ejection structure to make the whole body in an inclined state.

2. The damage prevention key tool according to claim 1, wherein When the key cap is placed in the key cap groove, the angle of inclination is 15-45°.

3. The damage prevention key tool of claim 1, wherein, The one-sided spring ejection structure comprises a top rod and a spring, the lower boss is provided with a through hole for the ejection of the top rod, the through hole penetrates the whole body of the lower boss, the spring groove is provided directly below the through hole, the diameter of the spring groove is larger than the size of the through hole, the rod body of the top rod is inserted into the through hole, the rod head enters the key cap groove, the rod tail extends into the spring groove, the spring is installed between the rod tail and the groove bottom, the size of the rod tail is larger than the size of the through hole.

4. The damage prevention key tool of claim 1, wherein, The lower boss is provided with a buffer pad at the top.

5. The damage prevention key tool of claim 1, wherein, The thimble groove on the upper boss has two, which are symmetrically arranged about the middle line of the upper boss.

6. The damage prevention key tool of claim 1, wherein, The one-sided spring ejection structure arranged on the lower boss has two groups, which are symmetrically arranged about the middle line of the lower boss.

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