A keycap paint spraying jig and method of use thereof

Abstract

The application discloses a key cap paint spraying jig and a use method thereof. The key cap paint spraying jig comprises a connecting plate, the connecting plate comprises a plurality of mutually overlapped sub-connecting plates, each of the sub-connecting plates is provided with a mounting boss for fixing the key cap, the mounting boss is provided with a key cap mounting groove, the mounting boss is connected with the key cap through the key cap mounting groove, the key cap mounting groove comprises a side edge groove and a surface groove, a clamping shaft is arranged on a groove wall of the surface groove, the key cap is provided with a buckle structure matched with the key cap mounting groove, the buckle structure comprises a clamping hook matched with the side edge groove and a clamping seat matched with the surface groove. The key cap paint spraying jig is fixedly connected with the key cap through the key cap mounting groove on the mounting boss, is firm as a whole, is not prone to problems such as inclination and falling off in the paint spraying process, ensures that the paint spraying process is smoothly carried out, reduces the paint spraying failure rate and improves production efficiency.

Description

Technical Field

[0001] This invention relates to the field of keycap painting technology, and in particular to a keycap painting fixture and its usage method. Background Technology

[0002] When painting keycaps, the keycaps need to be mounted on a fixture of a simulated keyboard for painting. Existing keycap painting fixtures include a base plate with a connecting plate structure. The connecting plate structure includes multiple connecting plates spliced ​​on the base plate, and the connecting plates have bosses for mounting the keycaps. However, in the existing technology, the keycaps are fixedly connected to the bosses with high rigidity and insufficient elasticity. Since the keycaps are made of plastic, excessive painting pressure or incorrect painting angle can cause keycap damage or insufficient painting precision.

[0003] Furthermore, the spraying pressure is relatively high when painting keycaps, and the keycaps are not securely fixed to the fixtures used to install them. This can cause the keycaps to fall off or tilt during the painting process, affecting painting efficiency and increasing the defect rate in production.

[0004] Therefore, there is an urgent need to propose a new technical solution to address the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art. On one hand, this invention provides a keycap painting fixture, and the technical solution adopted is:

[0006] A keycap painting fixture includes a connecting plate, which comprises several overlapping sub-connecting plates. Each sub-connecting plate is provided with a mounting boss for fixing a keycap. The mounting boss is provided with a keycap mounting groove, and the mounting boss is connected to the keycap through the keycap mounting groove. The keycap is engaged with the mounting boss.

[0007] In a preferred embodiment of the above technical solution, the connecting plate includes a first sub-connecting plate, a second sub-connecting plate, a third sub-connecting plate, a fourth sub-connecting plate, and a fifth sub-connecting plate, wherein the first and second sub-connecting plates overlap horizontally, the fifth and fourth sub-connecting plates overlap horizontally, the first and fifth sub-connecting plates overlap vertically, the second and fourth sub-connecting plates overlap vertically, and the second and fourth sub-connecting plates overlap horizontally with the third sub-connecting plate respectively.

[0008] Preferably, the two sub-connecting plates overlap each other, one of the sub-connecting plates has a protruding edge with a thickness less than the thickness of the sidewall of the sub-connecting plate, and the other sub-connecting plate has a groove on its edge that mates with the protruding edge, the protruding edge being embedded in the groove so that the surfaces of the two sub-connecting plates are substantially flush.

[0009] Preferably, a paint-blocking strip is provided on the side of the connecting plate where the mounting boss is located. The paint-blocking strip is wound around the connecting plate once. The portion of the connecting plate located inside the paint-blocking strip forms a painting area, and the portion of the connecting plate located outside the paint-blocking strip forms a fixing area.

[0010] Preferably, the mounting boss is located within the painting area.

[0011] Preferably, the height of the paint baffle strip is lower than the height of the mounting boss.

[0012] Preferably, a plurality of stacked pillars are provided in the fixing area of ​​the connecting plate, the stacked pillars are close to the edge of the connecting plate, and the plurality of stacked pillars are evenly distributed around the connecting plate;

[0013] Preferably, the total height of the mounting boss and the keycap mounted on the mounting boss is less than the height of the stacking pillar;

[0014] Preferably, the number of stacked pillars is greater than or equal to three.

[0015] Preferably, the edge of the connecting plate is provided with a retaining edge, the retaining edge extends from the connecting plate in a direction away from the mounting boss, the retaining edge contains a substrate, and the height of the retaining edge is greater than the thickness of the substrate.

[0016] Preferably, the connecting plate is provided with a plurality of mounting bosses, which are arranged in multiple rows on the connecting plate. Each row includes a plurality of mounting bosses, wherein upper paint penetration holes are provided between two adjacent mounting bosses in each row and between mounting bosses in two adjacent rows.

[0017] Preferably, the substrate is provided with a lower through-hole that is aligned with the upper through-hole. The shape of the lower through-hole is the same as that of the upper through-hole, and the diameter of the lower through-hole is larger than that of the upper through-hole.

[0018] Preferably, the upper through-hole has a hole wall extending from the connecting plate toward the substrate, the hole wall of the upper through-hole is accommodated in the lower through-hole on the substrate, and the upper through-hole and the lower through-hole are connected through the hole wall to form a paint guiding channel.

[0019] Preferably, the connecting plate is integrally formed with a disassembly protective plate for contacting the disassembly table support when the connecting plate is disassembled, and the disassembly protective plate is disposed at the four top corners of the connecting plate.

[0020] Preferably, the surface of the disassembly protective sheet is substantially flush with the surface of the connecting plate, and a limiting groove is provided around the edge of the disassembly protective sheet, the depth of which is less than the thickness of the connecting plate.

[0021] Preferably, the mounting boss is provided with a keycap relief groove, which is centrally located on the upper surface of the mounting boss. The keycap relief groove is recessed downward from the upper surface to form a groove, and the keycap has a protrusion that mates with the keycap relief groove.

[0022] Preferably, the bottom of the keycap clearance groove on the mounting boss is provided with a connecting post, one end of which is connected to the bottom of the keycap clearance groove, and the other end extends in the opposite direction to the opening of the keycap clearance groove.

[0023] Preferably, the sidewall of the connecting post is provided with a plurality of guide strips, which are distributed parallel to each other along the central axis of the connecting post. The connecting post is aligned and inserted into the small positioning holes on the substrate, and the connecting post and the small positioning holes on the substrate are interference-fitted.

[0024] Preferably, the length of the connecting post is greater than the thickness of the substrate. One end of the connecting post, which is connected to the bottom of the keycap clearance groove, is accommodated in the small positioning hole. The other end of the connecting post extends outward from the small positioning hole. The extended end is heat-fused and fixed to the surface of the substrate. The extended end is heat-fused to form a flat disc-shaped end. The diameter of the flat disc-shaped end is greater than the inner diameter of the small positioning hole.

[0025] Preferably, the connecting plate is further provided with a positioning post, the positioning post including a through hole formed in the connecting plate, the through hole having a hole wall extending from the connecting plate simultaneously in a first direction and a second direction, the through hole and the hole wall forming a positioning hole for the positioning post, the first direction being opposite to the second direction, and both the first direction and the second direction being perpendicular to the surface of the connecting plate.

[0026] Preferably, a cover plate is provided at one end of the wall of the through hole, the cover plate is located on the side of the connecting plate where the mounting boss is provided, the cover plate has a central hole that communicates with the through hole, and the wall of the through hole and the cover plate form the positioning post on the connecting plate.

[0027] Preferably, the installation height of the cover plate is greater than the height of the mounting boss.

[0028] Preferably, the other end of the through hole wall penetrates the main positioning hole on the substrate, and the height of this end is less than or equal to the thickness of the substrate.

[0029] Preferably, the connecting plate is provided with at least two positioning posts, and the two positioning posts are respectively provided at both ends of the connecting plate.

[0030] Preferably, the mounting boss is further provided with a plurality of upper reserved holes, the hole walls of the upper reserved holes extending downward from the surface of the mounting boss to penetrate the lower reserved holes on the substrate, the hole walls of the upper reserved holes being accommodated within the lower reserved holes, and the hole diameter of the upper reserved holes being smaller than the hole diameter of the lower reserved holes.

[0031] Preferably, the mounting boss is further provided with a keycap mounting groove, the keycap mounting groove including a side groove and a surface groove, and the keycap and the mounting boss are engaged and connected through the side groove and the surface groove;

[0032] Preferably, the side groove is formed on the surface of the mounting boss, and the side groove is formed along the side wall of the mounting boss. The height of one side wall that overlaps with the side wall of the mounting boss is less than the height of the mounting boss, and a recessed hole is provided on this side wall. The recessed hole engages with the reinforcement of the hook on the keycap.

[0033] Preferably, the surface groove is formed on the surface of the mounting boss, and a retaining shaft is provided on the groove wall of the surface groove. The mounting height of the retaining shaft is lower than the upper surface of the mounting boss, and the retaining shaft engages with the retaining seat on the keycap.

[0034] Preferably, the mounting boss is provided with two side grooves, two surface grooves, and three upper pre-drilled holes, the three upper pre-drilled holes being arranged in a triangular pattern.

[0035] Preferably, the side groove and the surface groove are disposed around the three pre-drilled holes.

[0036] Furthermore, the present invention also provides a method for using a keycap spray painting fixture, comprising:

[0037] The keycap painting fixture is fixedly connected to the substrate.

[0038] The keycaps are mounted on the mounting boss of the keycap painting fixture.

[0039] The pressure column of the automated machine tool is installed in the positioning hole of the positioning column of the keycap painting fixture.

[0040] The keycap painting fixture has the mounting boss facing the painting equipment, and the painting equipment is used to paint the surface of the keycap.

[0041] After the keycaps are painted, the keycaps are removed from the mounting boss, and the substrate and the keycap painting fixture are separated.

[0042] The above technical solution further includes using a spray painting device to spray paint the keycaps, specifically including:

[0043] When the spray nozzle of the spray painting equipment is aligned with the side of the keycap spray painting fixture with the mounting boss, a negative pressure is formed on the side of the keycap spray painting fixture where the base plate is mounted during spray painting. The mist paint that is not attached to the keycap is sucked out by the negative pressure through the paint penetration hole on the top of the keycap spray painting fixture.

[0044] Furthermore, separating the substrate from the keycap painting fixture specifically includes:

[0045] The keycap painting fixture is placed on the four ejector pins of the machine with the base plate facing upwards. The four ejector pins are respectively supported by the disassembly protective plates at the four corners of the keycap painting fixture.

[0046] An impact force is applied from above the substrate of the keycap painting fixture, the ejector pin penetrates the disassembly protective sheet, and the keycap painting fixture detaches from the substrate.

[0047] Compared with the prior art, the present invention has one or more of the following beneficial effects:

[0048] 1. The keycap painting fixture of the present invention is fixedly connected to the keycap by the keycap mounting groove on the mounting boss, which is firmly fixed as a whole. It is not easy to cause tilting or falling off during the painting process, ensuring the smooth progress of the painting process, reducing the painting defect rate and improving production efficiency.

[0049] 2. The keycap painting fixture of the present invention has a paint-permeable hole. The mist paint that is not attached to the keycap will be sucked away by negative pressure through the paint-permeable hole, and the hole wall of the paint-permeable hole penetrates the lower paint-permeable hole on the substrate, so the substrate will not be contaminated by the mist paint. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a three-dimensional structural diagram of the keycap painting fixture according to one embodiment of the present invention, wherein a substrate is nested on the back of the keycap painting fixture (the substrate is on the back of the fixture and is not shown due to the angle).

[0052] Figure 2 yes Figure 1 A rear view at an angle, showing the substrate nested on the back of the keycap painting fixture;

[0053] Figure 3 This is an exploded structural diagram of the keycap painting fixture obtained after separating it from the substrate;

[0054] Figure 4 This is a schematic diagram of the planar structure of the keycap painting fixture described in one embodiment of the present invention;

[0055] Figure 5 yes Figure 1 An exploded view of the keycap painting fixture shows that the connecting plate of the keycap painting fixture is decomposed into five sub-connecting plates.

[0056] Figure 6 yes Figure 4 A bottom view of the keycap painting fixture shown in the figure.

[0057] Figure 7 yes Figure 1 Enlarged view of the mounting boss in section A;

[0058] Figure 8 yes Figure 7 A magnified view of part B in the middle section;

[0059] Figure 9 This is a three-dimensional structural diagram of the mounting boss described in one embodiment of the present invention;

[0060] Figure 10 yes Figure 3 A magnified view of part C in the middle;

[0061] Figure 11 This is a three-dimensional structural diagram of the connecting column of the present invention disposed on the connecting plate;

[0062] Figure 12 This is a three-dimensional structural schematic diagram of the connecting column described in this invention;

[0063] Figure 13 This is a three-dimensional structural diagram of the keycap described in one embodiment of the present invention;

[0064] Figure 14 This is a three-dimensional structural diagram of the keycap mounted on the mounting boss.

[0065] Among them, 100-connecting plate, 101-first sub-connecting plate, 102-second sub-connecting plate, 103-third sub-connecting plate, 104-fourth sub-connecting plate, 105-fifth sub-connecting plate, 110-protruding edge; 120-groove; 130-paint baffle strip; 140-stacked post; 150-edge guard; 160-top paint penetration hole; 170-disassembly protective plate; 171-limiting groove; 180-positioning post; 181-cover plate;

[0066] 200-Mounting boss; 210-Keycap mounting slot; 211-Side groove; 212-Surface groove; 213-Spindle retainer; 220-Keycap clearance groove; 221-First clearance hole; 222-Second clearance groove; 223-Connecting post; 224-Guide strip; 230-Upper pre-drilled hole;

[0067] 300 - Keycap; 310 - Raised section; 320 - Snap-on structure; 321 - Hook; 3211 - Support post; 3212 - Top plate; 3213 - Reinforcement; 322 - Socket; 3221 - Sealing hole;

[0068] 400 - Substrate; 410 - Lower through hole; 420 - Small positioning hole; 430 - Main positioning hole; 440 - Lower reserved hole. Detailed Implementation

[0069] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0070] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] The essence of the present invention will be further explained below with reference to the accompanying drawings and embodiments.

[0073] Example:

[0074] See Figure 1-12To address the problems existing in the prior art, the present invention provides a keycap painting fixture, which includes a connecting plate 100. The connecting plate 100 includes several overlapping sub-connecting plates. Each sub-connecting plate is provided with a mounting boss 200 for fixing keycaps. The mounting boss 200 is provided with a keycap mounting groove 210. The mounting boss 200 is connected to the keycap through the keycap mounting groove 210. The keycap 300 is engaged with the mounting boss 200.

[0075] In one embodiment, see Figure 5 The connecting plate 100 of this invention can be divided into a first sub-connecting plate 101, a second sub-connecting plate 102, a third sub-connecting plate 103, a fourth sub-connecting plate 104, and a fifth sub-connecting plate 105. The first and second sub-connecting plates 101 and 102 overlap horizontally, the fifth and fourth sub-connecting plates 105 overlap horizontally, the first and fifth sub-connecting plates 101 and 105 overlap vertically, the second and fourth sub-connecting plates 102 overlap vertically, and the second and fourth sub-connecting plates 102 and 104 overlap horizontally with the third sub-connecting plate 103, respectively. A substrate is nested within the connecting plate formed by these five sub-connecting plates. Processing the multiple sub-connecting plates formed by disassembling the connecting plate individually improves the overall precision, offering a precision advantage compared to the original large-plate integral processing.

[0076] In one embodiment, see Figure 9 In this invention, two sub-connecting plates overlap each other. One of the sub-connecting plates has a protruding edge 110 on its edge, the thickness of which is less than the thickness of the sidewall of the sub-connecting plate. The other sub-connecting plate has a groove 120 on its edge that mates with the protruding edge 110. The protruding edge 110 is embedded in the groove 120, so that the surfaces of the two sub-connecting plates are substantially flush. This overlapping method effectively ensures the sealing of the connecting plate surfaces, preventing mist paint from seeping into the substrate on the back of the connecting plate through the gap between the two sub-connecting plates, thus ensuring the cleanliness of the substrate and extending its service life.

[0077] In one embodiment, see Figure 1 , 4The connecting plate 100 of the present invention is provided with a paint baffle strip 130 on one side where the mounting boss 200 is provided. The paint baffle strip 130 is wrapped around the connecting plate 100. The portion of the connecting plate 100 located inside the paint baffle strip 130 forms a spraying area, and the portion of the connecting plate 100 located outside the paint baffle strip 130 forms a fixing area. The mounting boss 200 is located within the spraying area. The paint baffle strip 130, which wraps around the connecting plate 100, divides the connecting plate 100 into a painting area and a fixing area. When the spray nozzle of the painting equipment sprays paint onto the keycap 300 on the mounting boss 200, the atomized paint in the nozzle will not affect the fixing area. It will only spray paint within the painting area, while the fixing area can be fixed to the machine tool to ensure that the keycap painting fixture will not move during the painting process. The base plate nested inside the keycap painting fixture can also support the keycap painting fixture. This support can enable the keycap painting fixture to withstand the painting pressure during the painting process and ensure the accuracy of keycap painting.

[0078] In one embodiment, see Figure 6 The height of the paint baffle strip 130 described in this invention is lower than the height of the mounting boss 200. The function of the paint baffle strip is to prevent the mist paint sprayed by the painting equipment from reaching the fixing area of ​​the connecting plate. Therefore, it does not need to be too high; it only needs to be able to prevent the spread of the mist paint to meet production requirements.

[0079] In one embodiment, see further. Figure 1The paint-blocking strip 130 extends vertically from the surface of the connecting plate 100 in a direction away from the connecting plate 100. The paint-blocking strip 130 comprises four segments, which are arranged in a circle around the connecting plate 100, forming the painting area on the surface of the connecting plate 100. The four segments are either not connected to each other, or they are connected end-to-end, or two or three adjacent segments are connected. Multiple stacking pillars 140 are provided within the fixing area of ​​the connecting plate 100, located near the edge of the connecting plate 100 and evenly distributed around its perimeter. The total height of the mounting boss 200 and the keycaps 300 mounted on the mounting boss 200 is less than the height of the stacking pillars 140. The number of stacking pillars 140 is greater than or equal to three. The fixing area of ​​the connecting plate 100 is further provided with multiple grooves, which are rectangular or semi-circular grooves recessed from the edge of the connecting plate 100 into the interior of the connecting plate 100. The fixing area of ​​the connecting plate 100 is also provided with disassembly protective plates 170 for contacting the disassembly table support when the connecting plate 100 is disassembled. The disassembly protective plates 170 are located at the four top corners of the connecting plate 100, and their surfaces are substantially flush with the surface of the connecting plate 100. A limiting groove 171 is provided around the edge of the disassembly protective plate 170, and the depth of the limiting groove 171 is less than the thickness of the connecting plate 100.

[0080] In one embodiment, see Figure 1The connecting plate 100 of the present invention has a plurality of stacking pillars 140 disposed in the fixing area. The stacking pillars 140 are close to the edge of the connecting plate 100 and are evenly distributed around the connecting plate 100. The total height of the mounting boss 200 and the keycaps mounted on the mounting boss 200 is less than the height of the stacking pillars 140. The stacking pillars 140 extend vertically from the surface of the connecting plate 100 in a direction away from the connecting plate 100. The stacking pillars 140 are elongated and are arranged around the surface of the connecting plate 100 in a circle. The mounting boss 200 is disposed inside the circle of stacking pillars 140. There are multiple stacking pillars 140, which are spaced apart on the surface of the connecting plate 100 and are arranged around the surface of the connecting plate 100 in a circle. The connecting plate 100 is a long strip plate. Four stacking pillars 140 are respectively arranged on each of the two long sides of the long strip plate, and the four stacking pillars 140 are evenly distributed along the long side direction of the long strip plate. Two stacking pillars 140 are respectively arranged on each of the two short sides of the long strip plate, and the two stacking pillars 140 are evenly distributed along the short side direction of the long strip plate. When multiple keycap painting fixtures are stacked, the stacking pillars can support and separate the keycap painting fixtures, ensuring that the keycaps installed on the mounting boss will not rub against the bottom of another keycap painting fixture, or rather, will not rub against the bottom of the substrate nested within another keycap painting fixture. At this time, the top of the stacking pillar rests against the bottom of the substrate, providing a safe space for the mounting boss on which the keycaps are installed.

[0081] In one embodiment, the number of stacking pillars 140 in this invention is greater than or equal to three. These stacking pillars serve as a support and divider on the connecting plate, thus requiring sufficient stability. Two or one stacking pillars may result in insufficient stability, while two large stacking pillars would occupy too much space. Therefore, this invention employs a scheme of multiple small stacking pillars, ensuring support stability while dispersing them to save space. The stacking pillars are positioned on the fixed area, near the edge of the fixture, and serve as support when the fixtures are stacked, preventing contact between the upper and lower fixtures. During stacking, the gap between the upper fixture aluminum plate and the lower fixture support boss is greater than the height of the keycap, preventing contact wear on the keycaps of the stacked fixtures.

[0082] In one embodiment, see Figure 1The connecting plate 100 of the present invention has a retaining edge 150 around its edge. The retaining edge 150 extends from the connecting plate 100 in a direction away from the mounting boss 200. The retaining edge 150 contains a substrate 400, and the height of the retaining edge 150 is greater than the thickness of the substrate 400. The retaining edge of the present invention forms a receiving groove on the back of the keycap painting fixture, which can accommodate the substrate. When multiple fixtures are stacked, it can play a limiting role. When the keycap painting fixture is fixed on the machine, the substrate supports the keycap painting fixture, which can ensure that the plastic keycap painting fixture does not deform. Similarly, the retaining edge can also protect the substrate from wear and extend the service life of the substrate.

[0083] In one embodiment, see Figure 1-5 and Figure 7 The connecting plate 100 of the present invention is provided with a plurality of mounting bosses 200, which are arranged in multiple rows on the connecting plate 100. Each row includes a plurality of mounting bosses 200. Upper through-holes 160 are provided between two adjacent mounting bosses 200 in each row and between mounting bosses 200 in two adjacent rows. The substrate 400 is provided with lower through-holes 410 aligned with the upper through-holes 160. The shape of the paint-through hole 410 is consistent with that of the upper paint-through hole 160. The diameter of the lower paint-through hole 410 is larger than that of the upper paint-through hole 160. The upper paint-through hole 160 has a hole wall extending from the connecting plate 100 toward the substrate 400. The hole wall of the upper paint-through hole 160 is accommodated within the lower paint-through hole 410 on the substrate 400. The upper paint-through hole 160 and the lower paint-through hole 410 are connected through the hole wall to form a paint guiding channel. The upper paint-through hole of the present invention can guide excess mist paint away during spraying. When spraying paint on the keycaps from above the front of the fixture, a negative pressure is set below the substrate. The upper paint-through hole can depressurize the sprayed paint, and the mist paint is sucked away by the negative pressure through the upper paint-through hole on the connecting plate, reducing mist paint rebound and improving the uniformity of keycap spraying.

[0084] In one embodiment, the upper through-hole 160 includes one or more of the following: a circular hole, an oblong hole, and a rectangular hole. The upper through-hole 160 is an oblong hole, and a reinforcing connecting plate is provided on the hole wall. The center positions of the two long sides of the oblong hole are connected by the reinforcing connecting plate, which is located at the end of the upper through-hole 160 opposite to the mounting boss. The end of the upper through-hole 160 opposite to the mounting boss is substantially flush with the side of the substrate 400 opposite to the mounting boss. A gap exists between the hole wall of the lower through-hole 410 of the substrate 400 and the hole wall of the upper through-hole 160, the width of which ranges from 1mm to 2mm.

[0085] In one embodiment, see Figure 1-5 The connecting plate 100 of the present invention is integrally formed with a disassembly protection piece 170 for contacting the disassembly table support when the connecting plate 100 is disassembled. The disassembly protection piece 170 is disposed at the four top corners of the connecting plate 100, and the surface of the disassembly protection piece 170 is basically flush with the surface of the connecting plate 100. A limiting groove 171 is provided around the edge of the disassembly protection piece 170. The limiting groove 171 is recessed downward from the surface of the connecting plate 100 to form a groove, and the depth of the limiting groove 171 is less than the thickness of the connecting plate 100. The width of the limiting groove 171 is 1 mm, and the outer diameter of the limiting groove 171 is 1 cm. The connecting plate 100 is a long strip plate, and a disassembly protection piece 170 is disposed at each of the four corners of the long strip plate. The distance from the edge of the limiting groove 171 of the disassembly protection piece 170 to the edge of the connecting plate 100 ranges from 0.5 cm to 1 cm. When disassembling the keycap painting fixture, the fixture is placed on the four ejector pins of the machine with the base plate facing upwards. The four ejector pins correspond to the disassembly protective plates at the four corners of the fixture. An impact force is then applied from above the base plate, causing the ejector pins to penetrate the disassembly protective plates, and the fixture detaches from the base plate. During fixture disassembly, the disassembly protective plates provide support, preventing one corner of the base plate from being suspended in mid-air when disassembling a sub-connecting plate, thus preventing base plate deformation. This is because the downward disassembly pressure during connecting block disassembly can easily cause base plate deformation. When disassembling the fixture, the ejector pins press against the disassembly protective plates and cut them off, disassembling the fixture while protecting the base plate (preventing base plate deformation). Furthermore, the disassembly protective plates are integrally formed with the fixture on the connecting plate, without gaps, preventing paint leakage. The disassembly protective plates are located in the fixing area of ​​the connecting plate.

[0086] In one embodiment, see Figure 7 , 8 The mounting boss 200 of the present invention is provided with a keycap relief groove 220. The keycap relief groove 220 is centrally located on the upper surface of the mounting boss 200. The keycap relief groove 220 is recessed downward from the upper surface to form a groove. The keycap has a protrusion 310 that cooperates with the keycap relief groove 220. The keycap is positioned by cooperating with the keycap relief groove through the protrusion.

[0087] In one embodiment, see further. Figure 7 , 8The keycap clearance groove 220 includes a first clearance hole 221 and a second clearance groove 222 communicating with the first clearance hole 221. The first clearance hole 221 and the second clearance groove 222 are coaxially arranged, and the diameter of the first clearance hole 221 is larger than the inner diameter of the second clearance groove 222. One end of the first clearance hole 221 is flush with the upper surface of the mounting boss 200. That is, the first clearance hole and the second clearance groove form a stepped groove, which has a better limiting effect and improved positioning accuracy.

[0088] In one embodiment, the first clearance hole 221 is a through hole with a depth of not less than 1 mm and an inner diameter of 0.5-0.7 cm. The first clearance hole 221 communicates with the second clearance groove 222. The first clearance hole 221 has a first end and a second end opposite to the first end. The first end is flush with the upper surface of the mounting boss 200, and the second end is connected to the top of the second clearance groove 222. The inner diameter of the second clearance groove 222 is smaller than the diameter of the first clearance hole 221. The plane containing the top of the second clearance groove 222 coincides with the plane containing the end face of the second end of the first clearance hole 221. The second end of the first clearance hole 221 and the top of the second clearance groove 222 are connected by a connecting plate. The depth of the second clearance groove 222 is not less than 1 mm, and the inner diameter of the second clearance groove 222 is 0.6-0.4 cm.

[0089] In one embodiment, the depth of the keycap relief groove 220 is greater than or equal to 2mm. If the depth of the keycap relief groove is insufficient, the keycap may slide within the keycap relief groove. Therefore, its depth is also an important indicator for positioning and limiting.

[0090] In one embodiment, see Figure 3 , 6 and Figure 9The mounting boss 200 of the present invention has a connecting post 223 at the bottom of the keycap clearance groove 220. One end of the connecting post 223 is connected to the bottom of the keycap clearance groove 220, and the other end extends in the opposite direction to the opening of the keycap clearance groove 220. A plurality of guide strips 224 are provided on the side wall of the connecting post 223, and the guide strips 224 are distributed parallel to each other along the central axis of the connecting post 223. The connecting post 223 is aligned and inserted into the small positioning hole 420 on the substrate 400, and the connecting post 223 and the small positioning hole 420 on the substrate 400 are interference-fitted. Of course, to ensure a more secure fixation between the fixture and the substrate, the connecting post 223 can be located not only behind the keycap clearance groove 220 of the mounting boss 200, but also on the back of the fixture connecting plate. The guide strip on the connecting post serves as a guide, and during the alignment and insertion of the connecting post with the small positioning holes on the substrate, the guide strip is scraped off by the small positioning holes on the substrate to form an interference fit. The connecting post on the fixture fixes the fixture to the substrate, ensuring the substrate's support for the fixture as a whole, making the substrate and the fixture as a whole more stable, further ensuring the overall stability of the fixture during painting, ensuring painting accuracy, and improving the yield and processing efficiency.

[0091] In one embodiment, see Figure 6 The length of the connecting post 223 in this invention is greater than the thickness of the substrate 400. Figure 6 The substrate is not shown in the figure, therefore a comparison cannot be made from the drawing, and Figure 6 (This is for illustrative purposes only and should not be construed as a limitation of the invention.) One end of the connecting post 223, which is connected to the bottom of the keycap clearance groove 220, is accommodated within the small positioning hole 420. The other end of the connecting post 223 extends outward from the small positioning hole 420. This extended end is heat-fused and fixed to the surface of the substrate 400. The extended end is heat-fused into a flat disc shape, and the diameter of this flat disc shape is larger than the inner diameter of the small positioning hole 420. Heat-melting the end of the connecting post into a flat disc shape further ensures the fixation between the fixture and the substrate, ensuring stability.

[0092] In one embodiment, the connecting plate 100 of the present invention has a first plate surface and a second plate surface, the first plate surface and the second plate surface being disposed opposite to each other. The first plate surface is provided with a mounting boss 200 for fixing a keycap 300, and the second plate surface is provided with a connecting post 223. One end of the connecting post 223 is connected to the connecting plate 100, and the other end extends in a direction away from the first plate surface. The connecting post 223 is aligned and inserted into a small positioning hole 420 on the substrate 400. A plurality of guide strips 224 are provided on the sidewall of the connecting post 223, and the plurality of guide strips 224 are distributed parallel to each other along the central axis of the connecting post 223. The connecting post 223 is interference-fitted with the small positioning hole 420 on the substrate 400. The length of the connecting post 223 is greater than the thickness of the substrate 400. The guide strip 224 extends from the end of the connecting post 223 connected to the keycap clearance groove 220 to the middle of the connecting post 223, and the guide strip 224 is evenly distributed on the side wall of the connecting post 223. The mounting boss 200 is provided with a keycap clearance groove 220, and the connecting post 223 is provided at the bottom of the keycap clearance groove 220 on the mounting boss 200. One end of the connecting post 223 is connected to the bottom of the keycap clearance groove 220, and the other end extends in the opposite direction to the opening of the keycap clearance groove 220. One end of the connecting post 223, which is connected to the bottom of the keycap clearance groove 220, is accommodated within the small positioning hole 420. The other end of the connecting post 223 extends outward from the small positioning hole 420. This extended end is heat-fused and fixed to the surface of the substrate 400. The extended end is heat-fused to form a flat disc-shaped end, the diameter of which is larger than the inner diameter of the small positioning hole 420. The connecting post 223 is located at the center of the bottom of the keycap clearance groove 220. The outer diameter of the connecting post 223 can be between 1.8 mm and 2.5 mm.

[0093] In one embodiment, see Figure 1-5The connecting plate 100 of the present invention is further provided with a positioning post 180. The positioning post 180 includes a through hole formed on the connecting plate 100. The through hole has a hole wall extending from the connecting plate 100 in both a first direction and a second direction. The first direction and the second direction are opposite, and both the first direction and the second direction are perpendicular to the plate surface of the connecting plate 100. A cover plate 181 is provided at one end of the hole wall of the through hole. The cover plate 181 is located on the side of the connecting plate 100 where the mounting boss 200 is provided. The cover plate 181 has a central hole that communicates with the through hole. The hole wall of the through hole and the cover plate 181 form the positioning post 180 on the connecting plate 100. The positioning post passes through a main positioning hole on the substrate corresponding to the positioning post, and the main positioning hole is engaged with the periphery of the positioning post. During painting, the positioning post on the keycap painting fixture can be directly positioned by the pressure post on the automated machine, preventing the positioning rod from wearing down the aluminum plate and extending the service life of the aluminum plate.

[0094] In one embodiment, the installation height of the cover plate 181 is greater than the height of the mounting boss 200. This ensures the positioning accuracy of the pressure post on the machine when directly positioning the positioning post on the keycap painting fixture. Since the pressure post is inserted into the hole of the positioning post, if the hole is too shallow, the fixture may deflect during painting, resulting in insecure fixing. The cover plate has a central hole that communicates with the through hole, allowing the insertion of the pressure post to be observed through the central hole, further confirming proper installation and reducing the defect rate caused by improper installation.

[0095] In one embodiment, the end of the through-hole wall without the cover plate 181 penetrates the main positioning hole 430 on the substrate 400. The height of the end of the through-hole wall without the cover plate 181 is less than or equal to the thickness of the substrate 400. This ensures that the main positioning hole of the substrate is fitted around the positioning post hole wall, protecting the main positioning hole of the substrate from wear by the pressure post of the automated equipment.

[0096] In one embodiment, see Figure 3 The connecting plate 100 of the present invention is provided with at least two positioning posts 180, which are respectively disposed at both ends of the connecting plate 100. The two positioning posts can ensure the stability of the fixture fixation, and the positioning posts cooperate with the pressure posts of the automated equipment. Therefore, the number of pressure posts of the automated equipment should also be considered. Furthermore, it is preferable that the two positioning posts are respectively disposed at both ends of the connecting plate, and the two positioning posts are not on the same horizontal line, that is, the two positioning posts are asymmetrical on both sides of the connecting plate.

[0097] In one embodiment, the positioning post 180 is a hollow column, and the wall of the through hole has an opening at one end in the first direction, the opening communicating with the through hole. The fixing post of the automated equipment is accommodated in the through hole through the opening. The main positioning hole 430 on the substrate 400 is located at the edge of the substrate 400, the inner diameter of the main positioning hole 430 is larger than the outer diameter of the wall of the through hole, and the end face of the main positioning hole 430 away from the mounting boss 200 is substantially flush with the end face of the wall of the through hole of the positioning post 180 in the second direction. At least two positioning posts 180 are provided on the connecting plate 100, and the two positioning posts 180 are respectively provided at both ends of the connecting plate 100. The two positioning posts 180 are diagonally distributed on the connecting plate 100.

[0098] In one embodiment, see Figure 7 The mounting boss 200 of the present invention is further provided with a plurality of upper reserved holes 230. The hole walls of the upper reserved holes 230 extend downward from the surface of the mounting boss 200 to penetrate the lower reserved holes 440 on the substrate 400. The hole walls of the upper reserved holes 230 are accommodated within the lower reserved holes 440. The diameter of the upper reserved holes 230 is smaller than the diameter of the lower reserved holes 440. The upper and lower reserved holes can be exposed to paint, and during painting, a negative pressure is formed below the fixture. The negative pressure, through the upper and lower reserved holes, can further fix the keycap to the mounting boss.

[0099] In one embodiment, see Figure 7 , 8 The mounting boss 200 of the present invention is further provided with a keycap mounting groove 210. The keycap mounting groove 210 includes a side groove 211 and a surface groove 212. The keycap 300 and the mounting boss 200 are engaged and connected by the side groove 211 and the surface groove 212. The side groove 211 is formed on the surface of the mounting boss 200 and is formed along the side wall of the mounting boss 200. The height of the side wall that overlaps with the side wall of the mounting boss 200 is less than the height of the mounting boss 200. This height difference makes it easier to fix the keycap to the mounting boss, which is convenient for installation and disassembly. A concave hole is provided on this side wall. The concave hole cooperates with the reinforcement 3213 of the hook 321 on the keycap 300. The reinforcement 3213 of the hook 321 is engaged in the concave hole.

[0100] In one embodiment, see further. Figure 6The surface groove 212 of this invention is formed on the surface of the mounting boss 200. A retaining pin is provided on the groove wall of the surface groove 212. The mounting height of the retaining pin is lower than the upper surface of the mounting boss 200. The retaining pin and the retaining socket on the keycap are aligned and installed to ensure a fixed connection. The cooperation between the retaining pin and the retaining socket allows for a slight rotation angle, which is more reasonable and provides an error buffer. That is, rotation within the deviation angle does not affect the accuracy of the paint spraying, and the relatively rigid connection makes it less likely to damage the keycap. In addition, the retaining pin and retaining socket connection can prevent paint from flowing into the socket hole, preventing the keycap with paint in the socket hole from making abnormal noise when the keyboard is pressed, reducing the lifespan of the keyboard and affecting the user experience.

[0101] In one embodiment, see further. Figure 8 The mounting boss 200 of this invention is provided with two side grooves 211, two surface grooves 212, and three upper reserved holes 230. The three upper reserved holes 230 are arranged in a triangular pattern, and the side grooves 211 and surface grooves 212 are located around the three upper reserved holes 230. This design makes the surface utilization of the mounting boss higher, and the arrangement of the side grooves, surface grooves, and upper reserved holes can ensure the installation stability of the keycap and ensure the painting accuracy.

[0102] The present invention also provides a keycap fixed on a keycap painting fixture, see below. Figure 7 , 8 9 and Figure 13 , 14 The keycap painting fixture of the present invention is provided with a mounting boss 200 for fixing the keycap 300. The mounting boss 200 is provided with a keycap mounting groove 210. The keycap 300 is provided with a snap-fit ​​structure 320 that cooperates with the keycap mounting groove 210. The keycap 300 is fixedly connected to the keycap painting fixture through the snap-fit ​​structure 320.

[0103] In one embodiment, the keycap mounting groove 210 provided by the mounting boss 200 includes a side groove 211 and a surface groove 212, and the keycap 300 is engaged with the side groove 211 and the surface groove 212 by a snap-fit ​​structure 320.

[0104] In one embodiment, the side groove 211 is formed on the surface of the mounting boss 200, and the side groove 211 is formed along the side wall of the mounting boss 200. The height of the side wall that coincides with the side wall of the mounting boss 200 is less than the height of the mounting boss 200. This height difference makes it easier for the keycap to be fixed and positioned with the mounting boss, which is convenient for installation and disassembly. In addition, a recessed hole is provided on this side wall. The recessed hole cooperates with the reinforcement 3213 of the hook 321 on the keycap 300. The reinforcement 3213 of the hook 321 is engaged in the recessed hole. The surface groove 212 is formed on the surface of the mounting boss 200. A retaining pin 213 is provided on the groove wall of the surface groove 212. The mounting height of the retaining pin 213 is lower than the upper surface of the mounting boss 200. The snap-fit ​​structure 320 of the keycap 300 includes a hook 321 that mates with the side groove 211 and a retaining seat 322 that mates with the surface groove 212. The alignment and installation of the retaining pin and the retaining seat on the keycap ensures a fixed connection. The fit between the retaining pin and the retaining seat allows for a slight rotation angle, which is a more reasonable design and provides error buffer. That is, rotation within the deviation angle does not affect the accuracy of the paint spraying. Moreover, the relatively rigid connection makes it less likely to damage the keycap. Furthermore, the retaining pin and retaining seat connection can prevent paint from flowing into the seat hole of the retaining seat. This prevents keycaps with paint in the seat hole from making abnormal noises when the keyboard is pressed, reducing the lifespan of the keyboard and affecting the user experience.

[0105] In one embodiment, the latch structure 320 has a reinforcing member 3213 on its hook 321, which is accommodated in a recessed hole on the side wall of the side groove 211. A retaining pin 213 is provided on the groove wall of the surface groove 212, and the keycap 300 is fixedly connected to the retaining pin 213 of the surface groove 212 via a retaining base 322. The reinforcing member is located on the side of the support column, connecting the support column to the edge of the keycap, thus increasing the strength of the latch and making it less prone to breakage. This structural design allows the support column and the top plate to form a latch that mates with the side groove of the mounting boss.

[0106] In one embodiment, the latch 321 includes a support post 3211 and a top plate 3212 connected to the support post 3211. One end of the support post 3211 is connected to the back of the keycap 300, and the other end is connected to the top plate 3212. The cross-sectional shape of the support post 3211 is "L" shaped, and the top plate 3212 is rectangular. The top plate 3212 covers the surface of the support plate. The reinforcing body 3213 is disposed on the side wall of the support post 3211. The latch seat 322 has a seat hole 3221 that mates with the latch shaft 213. The central axis direction of the seat hole 3221 is the same as the central axis direction of the latch shaft 213. The hole wall of the seat hole 3221 has an opening, and the latch shaft 213 is accommodated in the seat hole 3221 through the opening. The alignment and installation of the hinge with the keycap ensures a secure connection. The fit between the hinge and the keycap allows for slight rotation, which is a more reasonable design and provides an error buffer. This means that rotation within the deviation angle does not affect the accuracy of the paint spraying. Moreover, the relatively rigid connection makes it less likely to damage the keycap.

[0107] In one embodiment, the seat hole 3221 is a circular through hole, and the width of the opening on the wall of the seat hole 3221 is smaller than the diameter of the seat hole 3221; the cross-section of the retaining shaft 213 is a combination of a rectangle and a semicircle, and the diameter of the semicircle is larger than the side length of the rectangle. The rectangle and the semicircle are connected by a bevel. The rectangle is close to the bottom of the mounting boss 200, and the semicircle is close to the surface of the mounting boss 200. The retaining shaft 213 is received in the seat hole 3221 from the opening of the seat hole 3221, the semicircular cross-section of the retaining shaft 213 is received in the seat hole 3221, and the rectangular cross-section of the retaining shaft 213 is located at the opening of the seat hole 3221.

[0108] In one embodiment, see Figure 6 , 7 The diameter of the semi-circular cross-section of the keycap 213 is greater than the width of the opening on the wall of the seat hole 3221, and the keycap 300's seat 322 is pressed onto the keycap 213 from the opening of the seat hole 3221.

[0109] In one embodiment, a keycap relief groove 220 is centrally located on the upper surface of the mounting boss 200. The keycap relief groove 220 is recessed downwards from the upper surface to form a groove. The keycap 300 has a protrusion 310 that mates with the keycap relief groove 220. The keycap is positioned by engaging with the keycap relief groove through the protrusion. The depth of the keycap relief groove 220 can be greater than or equal to 2 mm. If the depth of the keycap relief groove is insufficient, the keycap may slip within the groove. Therefore, its depth is also an important indicator for positioning and limiting.

[0110] In one embodiment, the keycap clearance groove 220 is surrounded by upper reserved holes 230. There may be three upper reserved holes 230. The keycap clearance groove 220 is located at the center of the three upper reserved holes 230. The upper reserved holes 230 have hole walls extending from the surface of the mounting boss 200 toward the substrate. The upper reserved holes 230 can assist in paint penetration so that when the keycap is painted, the mist paint does not penetrate into the snap-fit ​​structure of the keycap, thus providing a protective function.

[0111] The present invention also provides a method for using a keycap spray painting fixture, comprising:

[0112] The keycap painting fixture is fixedly connected to the base plate 400.

[0113] The keycap 300 is installed on the mounting boss 200 of the keycap painting fixture.

[0114] The pressure column of the automated machine tool is installed in the through hole of the positioning column 180 of the keycap painting fixture.

[0115] The keycap painting fixture has the mounting boss 200 facing the painting equipment, and the painting equipment is used to paint the surface of the keycap 300.

[0116] After the keycap 300 is painted, the keycap 300 is removed from the mounting boss 200, and the substrate 400 is separated from the keycap painting fixture.

[0117] The fixture of this invention is fixedly connected to a base plate via multiple connecting posts. The connecting posts pass through corresponding small positioning holes on the base plate, with the ends of the connecting posts extending out of the small positioning holes. A guide strip at the base of the connecting post is cut by the small positioning holes, ensuring an interference fit between the base and the small positioning holes on the aluminum plate. The protruding ends of the connecting posts are heat-fused on the back of the aluminum plate for further fixation, improving the stability of fixing multiple connecting blocks to the aluminum plate. The positioning posts of this invention pass through main positioning holes on the aluminum plate corresponding to the positioning posts, and the main positioning holes are positioned around the positioning posts. They can be directly positioned on the painting fixture by pressure posts on an automated machine, preventing wear on the aluminum plate from the positioning rods. The automated machine presses down on the fixing area of ​​the fixture for further fixation; these multiple fixing actions ensure the accuracy of painting using the fixture.

[0118] In one embodiment, the application of a spray painting device to paint the keycaps according to the present invention specifically includes:

[0119] The spray nozzle of the painting equipment is aligned with the side of the keycap painting fixture that has the mounting boss. During painting, a negative pressure is formed on the side of the keycap painting fixture where the substrate is mounted. The atomized paint that is not adhering to the keycaps is drawn out by the negative pressure through the paint penetration holes on the top of the keycap painting fixture. This method can ensure the uniformity of the paint spraying and improve the product yield.

[0120] In one embodiment, the separation of the substrate 400 from the keycap painting fixture according to the present invention specifically includes:

[0121] The keycap painting fixture is placed on the four ejector pins of the machine with the base plate facing upwards. The four ejector pins are respectively supported by the disassembly protective plates at the four corners of the keycap painting fixture.

[0122] An impact force is applied from above the substrate of the keycap painting fixture, the ejector pin penetrates the disassembly protective sheet, and the keycap painting fixture detaches from the substrate.

[0123] The fixture described in this invention can be used three times in production applications. If it is used further, there may be a risk that the precision requirements will not be met. Therefore, in order to ensure that the processing precision of the product meets the requirements, the fixture should be replaced after it has been used three times. However, the corresponding substrate does not need to be replaced and will be used until it no longer meets the processing requirements. Therefore, the substrate, as a durable product, is protected by the fixture in every way to extend its service life. This is not only for cost considerations but also for the sustainable use of resources.

[0124] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0125] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.

Claims

1. A keycap paint spraying jig, comprising: The connecting plate comprises a plurality of mutually overlapped sub-connecting plates, each of which is provided with a mounting boss for fixing the keycap, and the mounting boss is provided with a keycap mounting groove for connecting the keycap, and the keycap is connected with the mounting boss through the keycap mounting groove; The keycap mounting groove provided on the mounting boss comprises a side groove and a surface groove, and the keycap is connected with the mounting boss through the side groove and the surface groove; The side groove is arranged on the surface of the mounting boss and along the side wall of the mounting boss, the height of one side wall of the side groove coinciding with the side wall of the mounting boss is less than the height of the mounting boss, and the one side wall is provided with a recess hole, and the recess hole is engaged with the reinforcing body of the hook on the keycap; The surface groove is arranged on the surface of the mounting boss, and the groove wall of the surface groove is provided with a clamping shaft, the mounting height of the clamping shaft is lower than the upper surface of the mounting boss, and the clamping shaft is engaged with the clamping seat on the keycap; The connecting plate is provided with a paint blocking strip on one side of the connecting plate provided with the mounting boss, the paint blocking strip is arranged around the connecting plate, the part of the connecting plate inside the paint blocking strip forms a paint spraying area, and the part of the connecting plate outside the paint blocking strip forms a fixing area, The mounting boss is arranged in the paint spraying area; The connecting plate is provided with a plurality of mounting bosses, and the plurality of mounting bosses are arranged in multiple rows on the connecting plate, each row comprises a plurality of mounting bosses, and wherein, The upper paint through hole is provided between the adjacent two mounting bosses in each row and between the mounting bosses of the adjacent two rows; The substrate is provided with a lower paint through hole arranged in position with the upper paint through hole, The upper paint through hole has a hole wall extending from the connecting plate towards the substrate, the hole wall of the upper paint through hole is accommodated in the lower paint through hole on the substrate, and the upper paint through hole and the lower paint through hole are communicated through the hole wall and form a paint guide channel; The mounting boss is provided with a keycap avoiding groove, the keycap avoiding groove is centrally arranged on the upper surface of the mounting boss, the keycap avoiding groove is recessed downward from the upper surface to form a groove shape, and the keycap has a protrusion matched with the keycap avoiding groove; The mounting boss is also provided with a plurality of upper reserved holes, the hole wall of the upper reserved hole extends downward from the surface of the mounting boss to penetrate the lower reserved hole on the substrate, the hole wall of the upper reserved hole is accommodated in the lower reserved hole, and the hole diameter of the upper reserved hole is smaller than the hole diameter of the lower reserved hole; The connecting plate is also provided with a positioning column, the positioning column comprises a through hole arranged on the connecting plate, the through hole has a hole wall extending from the connecting plate in a first direction and a second direction, the through hole and the hole wall form a positioning hole of the positioning column, the first direction is opposite to the second direction, and the first direction and the second direction are both perpendicular to the plate surface of the connecting plate, one end of the through hole wall is provided with a cover plate, the cover plate is located on the side of the connecting plate provided with the mounting boss, the through hole wall and the cover plate form the positioning column on the connecting plate, and the other end of the through hole wall penetrates the main positioning hole on the substrate.

2. The keycap paint spraying jig according to claim 1, wherein The connecting plate comprises a first sub-connecting plate, a second sub-connecting plate, a third sub-connecting plate, a fourth sub-connecting plate and a fifth sub-connecting plate, wherein the first sub-connecting plate and the second sub-connecting plate are overlapped left and right, the fifth sub-connecting plate and the fourth sub-connecting plate are overlapped left and right, the first sub-connecting plate and the fifth sub-connecting plate are overlapped up and down, the second sub-connecting plate and the fourth sub-connecting plate are overlapped up and down, and the second sub-connecting plate and the fourth sub-connecting plate are respectively overlapped left and right with the third sub-connecting plate.

3. The keycap paint spraying jig according to claim 1, wherein, A plurality of stacking columns are arranged in the fixing area of the connecting plate, the stacking columns are close to the edges of the connecting plate, and the plurality of stacking columns are uniformly distributed around the connecting plate. The total height of the mounting boss and the keycap mounted on the mounting boss is less than the height of the stacking column.

4. The keycap paint spraying jig according to claim 3, wherein, An edge of the connecting plate is provided with a ring-shaped retaining edge extending away from the mounting boss, and the ring-shaped retaining edge contains the substrate.

5. The keycap paint spraying jig according to claim 1, wherein, A disassembly protection piece for abutting against the support part of the disassembly table when the connecting plate is disassembled is integrally formed on the connecting plate, and the disassembly protection piece is arranged at the four corners of the connecting plate. The surface of the disassembly protection piece is substantially flush with the surface of the connecting plate, and the edge of the disassembly protection piece is provided with a ring-shaped limiting groove, and the depth of the limiting groove is less than the thickness of the connecting plate.

6. The keycap paint spraying jig according to claim 1, wherein, The groove bottom of the keycap avoiding groove on the mounting boss is provided with a connecting column, one end of the connecting column is connected with the groove bottom of the keycap avoiding groove, and the other end extends in a direction opposite to the groove opening direction of the keycap avoiding groove. A plurality of guide strips are arranged on the side wall of the connecting column, the connecting column is inserted into the small positioning hole on the substrate in a position-locked manner, and the connecting column is in interference fit with the small positioning hole on the substrate. The length of the connecting column is greater than the thickness of the substrate, one end of the connecting column connected with the groove bottom of the keycap avoiding groove is accommodated in the small positioning hole, and the other end of the connecting column extends out of the small positioning hole, and the end part extending out of the small positioning hole is fixed on the surface of the substrate by heat melting.

7. A method for using the paint spraying jig for keycaps as claimed in any one of claims 1 to 6, wherein, It comprises: The keycap paint spraying jig is fixedly connected to the substrate, The keycap is mounted on the mounting boss of the keycap paint spraying jig, The pressing column of the automatic machine is mounted in the positioning hole of the positioning column of the keycap paint spraying jig, The side of the keycap paint spraying jig provided with the mounting boss faces the paint spraying equipment, and the surface of the keycap is painted by using the paint spraying equipment. After the surface of the keycap is painted, the keycap is disassembled from the mounting boss, and the substrate and the keycap paint spraying jig are disassembled.

8. The method of using a keycap paint-spraying jig of claim 7, wherein, The keycap is painted by using the paint spraying equipment, specifically including: The nozzle of the paint spraying equipment is aimed at the side of the keycap paint spraying jig provided with the mounting boss, and when painting, negative pressure is formed on the side of the keycap paint spraying jig provided with the substrate, and the misty paint not attached to the keycap is sucked out through the upper paint permeating hole of the keycap paint spraying jig.

9. The method of using a keycap paint-spraying jig of claim 7, wherein, The substrate and the keycap paint spraying jig are disassembled, specifically including: The keycap paint spraying jig is placed on the four thimbles of the machine in a manner that the substrate faces upward, and the four thimbles correspondingly support the disassembly protection pieces at the four corners of the keycap paint spraying jig, An impact force is applied from above the substrate of the keycap paint spraying jig, the ejector pin penetrates the disassembly protection sheet, and the keycap paint spraying jig is separated from the substrate.

Images