A spraying jig for a curved special-shaped surface of a key shell and a spraying equipment thereof

Abstract

The present application relates to the technical field of spraying jigs, in particular to a spraying jig for the curved and irregular surface of a key shell and a spraying equipment thereof, which solves the problem of missing spraying caused by the shielding of the curved surface of the key shell due to the clamping mode of the jig and the pollution of the inside of the key shell caused by the paint drifting from the bottom surface of the key shell to the inside of the shell. The jig base module includes a fixed plate and a positioning base block, which serves as the base of the whole jig and is fixedly installed to ensure the stability of the jig. The workpiece support module includes a fixed seat, a rotating support plate and an adjusting electric telescopic rod, which supports and controls the rotation of the rotating support plate to support the key shell with the rotating support plate. The present application clamps and positions the key shell from the inside to ensure that the curved surface of the key shell is not shielded, ensuring the smooth progress of the spraying operation and the spraying quality.

Description

Technical Field

[0001] This invention relates to the field of spraying fixture technology, specifically to a spraying fixture and spraying equipment for curved and irregularly shaped surfaces of key shells. Background Technology

[0002] Fixtures are a broad category of tools used in woodworking, metalworking, fitter work, machinery, electrical control, and other handicrafts. They are primarily used to assist in controlling position or movement. Fixtures can be divided into three categories: process assembly fixtures, project testing fixtures, and circuit board testing fixtures. In spray painting operations, fixtures are needed to clamp and fix the workpiece to be sprayed. For example, in the spray painting operation of the curved surface of a key shell, the key shell needs to be fixed on a special fixture. These fixtures are usually equipped with flexible inner bevels, which fix the key shell through the inner bevels, and the latter clamps the key shell with external clamps.

[0003] When conventional jigs are used to spray paint the curved surfaces of key shells, the jigs need to clamp the sides of the key shells, resulting in missed areas during spraying. Furthermore, when spraying the curved sides of the key shells, paint drifts from the bottom of the key shells into the interior, causing contamination inside the key shells. Therefore, this does not meet the existing requirements. To address this, we propose a spraying jig and spraying equipment for the curved and irregular surfaces of key shells. Summary of the Invention

[0004] The purpose of this invention is to provide a spraying fixture and spraying equipment for the curved and irregular surfaces of key shells, so as to solve the problems mentioned in the background art. When spraying the curved surfaces of key shells with general fixtures, the fixture needs to clamp the side of the key shell, resulting in missed areas on the side of the key during spraying. In addition, when spraying the side of the curved surface of the key shell, the paint drifts from the bottom of the key shell into the inside of the key, thus causing the inside of the key shell to be contaminated.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a spraying fixture for the curved, irregularly shaped surface of a key shell, comprising: The fixture base module includes a fixing plate and a positioning base block, which serve as the base of the entire fixture and are fixedly installed to ensure the stability of the fixture. The workpiece support module includes a fixed base, a rotating support plate, and an adjustable electric telescopic rod. The adjustable electric telescopic rod supports the rotating support plate and controls its rotation. The rotating support plate supports the key housing. The internal positioning module for the workpiece includes a base plate, a bottom plate, internal clamping claws, an inelastic connecting rope, a magnetic metal plate, and an electromagnet. The bottom plate is detachably installed on the bottom of the base plate. The internal clamping claws are rotatably installed between the base plate and the bottom plate, and the internal clamping claws are fixed to the magnetic metal plate by the inelastic connecting rope. The electromagnet is fixed inside the base plate and magnetically attracted to the magnetic metal plate. The internal clamping claws press the inner wall of the key shell outward to achieve internal positioning of the key shell. The workpiece bottom gap sealing module includes a sealing electric telescopic rod, a lifting plate, and a silicone sealing strip. The silicone sealing strip is fixed to the surface of the lifting plate, and the cross-section of the silicone sealing strip is L-shaped. The lifting plate is fixed to the movable end of the sealing electric telescopic rod. The lifting plate and silicone sealing strip are raised and lowered by controlling the sealing electric telescopic rod, thereby sealing the bottom of the key shell through the lifting plate and silicone sealing strip.

[0006] Preferably, the fixture base module further includes a power supply, which is located inside the positioning base block. The positioning base block has heat dissipation vents on both sides of its bottom. The power supply is connected to the electromagnet, the enclosed electric telescopic rod, and the adjustable electric telescopic rod via wires. The wire connected to the electromagnet passes through the base plate, and the other wires pass through the heat dissipation vents.

[0007] Preferably, the base plate is sleeved on the outer top of the positioning base block and connected to the positioning base block by screws. Two support rods are fixed on the upper surface of the base plate. The inelastic connecting rope passes over the support rods and slides in contact with the inelastic connecting rope. Multiple auxiliary support springs are fixed between the bottom of the magnetic metal plate and the base plate.

[0008] Preferably, the substrate has mounting slots on both sides, the bottom end of the substrate is rotatably engaged with the inside of the mounting slots, and a plurality of limiting support blocks are fixed on the upper surface of the base plate. The limiting support blocks are engaged with the inside of the mounting slots and contact the bottom of the internal clamping claws.

[0009] Preferably, the upper surface of the limiting support block is provided with an arc-shaped curved surface, and the arc-shaped curved surface is consistent with the curvature of the outer surface of the bottom end of the internal clamping claw.

[0010] Preferably, a metal spring is fixed at the bottom of the internal clamping claw. The metal spring is V-shaped and one end is clamped and fixed by a limiting support block and a base plate.

[0011] Preferably, the internal clamping claw includes a clamping plate, the top of which is inlaid with an anti-slip pad, and the bottom of which is fixed with a rotating locking seat. The rotating locking seat has a cylindrical structure, and the top of the rotating locking seat is provided with a mating groove. A metal spring is fixed inside the mating groove, and a limit strip is fixed on the outer surface of the clamping plate.

[0012] Preferably, the fixed base and the enclosed electric telescopic rod are both fixed on the upper surface of the fixed plate. The bottom and top ends of the adjustable electric telescopic rod are rotatably connected to the fixed base and the rotating support plate through shaft pins. The two adjustable electric telescopic rods and the four enclosed electric telescopic rods are all equipped with encoders and displacement sensors to achieve closed-loop synchronous control.

[0013] Preferably, the workpiece bottom gap sealing module further includes a shielding curtain, which is fixed to the bottom of the lifting plate and located outside the four enclosed electric telescopic rods. The height of the shielding curtain is greater than the extension length of the piston rod of the enclosed electric telescopic rod.

[0014] A spraying apparatus includes a spraying fixture for the curved, irregularly shaped surface of a key housing.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes a metal spring to push the bottom of the internal clamping claw outward, causing the anti-slip pad at the top of the internal clamping claw to adhere to the inner wall of the key shell and apply outward pressure to the key shell. This clamps and fixes the key shell from the inside, achieving unobstructed curved surfaces of the key shell. This ensures that there are no missed areas on the curved surfaces of the key shell during the spraying operation, thus guaranteeing the quality of the spraying on the curved surfaces of the key shell. 2. This invention uses an internal clamping claw to achieve rotation and contact / separation with the key shell through an electromagnet, a magnetic metal plate, an inelastic connecting rope, and a metal spring. After the key shell curved surface is sprayed, the internal clamping claw is separated from the key shell. Compared with the general fixture that uses an internal bevel to fix the key shell, this invention facilitates quick separation of the key and does not damage the internal clamping claw or the key shell when removing the key shell. 3. This invention utilizes a closed electric telescopic rod to move the lifting plate and silicone sealing strip upwards, so that the silicone sealing strip seals the bottom edge of the key shell, and the shielding curtain forms a shielding structure below the lifting plate to protect the internal positioning module of the workpiece. This can prevent the paint from drifting from the bottom of the key shell into the inside of the key shell, thereby avoiding paint contamination of the inside of the key shell. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the workpiece support module of the present invention; Figure 3 This is a schematic diagram of the structure of the workpiece bottom gap sealing module of the present invention; Figure 4 This is a schematic diagram of the internal positioning module of the workpiece according to the present invention; Figure 5 This is a schematic diagram of the internal clamping claw of the present invention; Figure 6 This is a schematic diagram showing the connection between the substrate and the base plate of the present invention; Figure 7 This is a cross-sectional schematic diagram of the silicone sealing strip of the present invention.

[0017] In the diagram: 1. Fixture base module; 101. Fixing plate; 102. Positioning block; 103. Power supply; 104. Heat dissipation vent; 2. Workpiece support module; 201. Fixing base; 202. Rotating support plate; 203. Adjustable electric telescopic rod; 3. Workpiece internal positioning module; 301. Base plate; 302. Magnetic metal plate; 303. Support rod; 304. Internal clamping claw; 3041. Clamping plate; 3042. Limiting strip 3043, Rotating locking seat; 3044, Docking groove; 305, Anti-slip pad; 306, Non-elastic connecting rope; 307, Base plate; 308, Metal spring; 309, Limiting support block; 310, Mounting slot; 311, Electromagnet; 312, Auxiliary support spring; 4, Workpiece bottom gap sealing module; 401, Enclosed electric telescopic rod; 402, Screen curtain; 403, Lifting plate; 404, Silicone sealing strip. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] A spraying fixture for the curved, irregularly shaped surface of a key shell, comprising: like Figure 1 , Figure 2 and Figure 4 As shown, the fixture base module 1 includes a fixing plate 101 and a positioning base block 102, which serve as the base of the entire fixture and are fixedly installed to ensure the stability of the fixture.

[0020] The fixture base module 1 also includes a power supply 103, which is located inside the positioning base block 102. The positioning base block 102 has heat dissipation vents 104 on both sides of its bottom. The power supply 103 is connected to the electromagnet 311, the closed electric telescopic rod 401, and the adjusting electric telescopic rod 203 through wires. The wire connected to the electromagnet 311 passes through the base plate 301, and the other wires pass through the heat dissipation vents 104. The function of the heat dissipation vents 104 is to ensure that the external airflow can contact the power supply 103, so as to ensure that the power supply 103 dissipates heat during operation and prevents the power supply 103 from becoming fixed due to overheating.

[0021] like Figure 1 and Figure 2As shown, the workpiece support module 2 includes a fixed base 201, a rotating support plate 202, and an adjustable electric telescopic rod 203. The adjustable electric telescopic rod 203 supports the rotating support plate 202 and controls the rotation of the rotating support plate 202, thereby supporting the key housing.

[0022] The fixed base 201 and the enclosed electric telescopic rod 401 are both fixed on the upper surface of the fixed plate 101. The bottom and top ends of the adjustable electric telescopic rod 203 are rotatably connected to the fixed base 201 and the rotating support plate 202 through shaft pins. The two adjustable electric telescopic rods 203 and the four enclosed electric telescopic rods 401 are equipped with encoders and displacement sensors to achieve closed-loop synchronous control. The encoders and displacement sensors provide real-time feedback on the position information of the movable ends of the adjustable electric telescopic rods 203 and the enclosed electric telescopic rods 401. The PLC control terminal controls the movement of the adjustable electric telescopic rods 203 and the enclosed electric telescopic rods 401 according to the feedback information, thereby achieving the synchronous movement of the two adjustable electric telescopic rods 203 and the four enclosed electric telescopic rods 401.

[0023] like Figures 1 to 6 As shown, the internal positioning module 3 of the workpiece includes a base plate 301, a bottom plate 307, an internal clamping claw 304, a non-elastic connecting rope 306, a magnetic metal plate 302, and an electromagnet 311. The bottom plate 307 is detachably installed at the bottom of the base plate 301. The internal clamping claw 304 is rotatably installed between the base plate 301 and the bottom plate 307, and the internal clamping claw 304 is fixed to the magnetic metal plate 302 by the non-elastic connecting rope 306. The electromagnet 311 is fixed inside the base plate 301 and magnetically attracted to the magnetic metal plate 302. The internal clamping claw 304 is used to press the inner wall of the key shell outward to achieve internal positioning of the key shell.

[0024] The base plate 307 is fitted onto the outer top of the positioning base block 102 and connected to the positioning base block 102 by screws. Two support rods 303 are fixed on the upper surface of the base plate 301. A non-elastic connecting rope 306 passes over the support rods 303 and slides in contact with the non-elastic connecting rope 306. Multiple auxiliary support springs 312 are fixed between the bottom of the magnetic metal plate 302 and the base plate 301. The auxiliary support springs 312 provide auxiliary support for the magnetic metal plate 302, ensuring that after the electromagnet 311 cuts off the current supply, the magnetic metal plate 302 can return to its original position and separate from the electromagnet 311. The substrate 301 has mounting slots 310 on both sides. The bottom end of the substrate 301 is rotatably engaged with the inside of the mounting slots 310. The upper surface of the base plate 307 is fixed with multiple limiting support blocks 309. The limiting support blocks 309 are engaged with the inside of the mounting slots 310 and contact the bottom of the internal clamping claw 304. The upper surface of the limiting support block 309 has an arc-shaped curved surface. The arc-shaped curved surface is consistent with the curvature of the outer surface of the bottom end of the internal clamping claw 304. The limiting support blocks 309 limit and restrict the bottom end of the internal clamping claw 304 located inside the mounting slots 310, so as to prevent the internal clamping claw 304 from falling between the base plate 307 and the substrate 301, while ensuring that the bottom end of the internal clamping claw 304 can rotate freely.

[0025] A metal spring 308 is fixed to the bottom of the internal clamping claw 304. The metal spring 308 is V-shaped and one end is clamped and fixed by the limiting support block 309 and the base plate 301. The V-shaped bent metal spring 308 has excellent elastic potential energy. When the top of the internal clamping claw 304 is pulled upward by the inelastic connecting rope 306, the metal spring 308 bends elastically. When the internal clamping claw 304 loses the pulling force of the inelastic connecting rope 306, the metal spring 308 deforms elastically and drives the internal clamping claw 304 to reset.

[0026] As a preferred embodiment, such as Figure 5 As shown, the internal clamping claw 304 includes a clamping plate 3041. The top of the clamping plate 3041 is inlaid with an anti-slip pad 305, and the bottom of the clamping plate 3041 is fixed with a rotating locking seat 3043. The rotating locking seat 3043 has a cylindrical structure, and the top of the rotating locking seat 3043 is provided with a docking groove 3044. The metal spring 308 is fixed inside the docking groove 3044. The anti-slip pad 305 increases the frictional resistance between the internal clamping claw 304 and the inner wall of the key shell, and changes the rigid contact between the internal clamping claw 304 and the key shell to a flexible contact, so as to avoid damage to the inside of the key shell.

[0027] A limiting strip 3042 is fixed on the outer surface of the clamping plate 3041. The limiting strip 3042 is used to contact the bottom edge of the key housing when the silicone sealing strip 404 seals the bottom edge of the key housing, so as to prevent the lifting plate 403 and the silicone sealing strip 404 from moving upward and pushing the key housing away from the outside of the internal clamping claw 304 and causing it to fall.

[0028] like Figures 1 to 3 and Figure 7As shown, the workpiece bottom gap sealing module 4 includes a sealing electric telescopic rod 401, a lifting plate 403, and a silicone sealing strip 404. The silicone sealing strip 404 is fixed to the surface of the lifting plate 403, and the cross-section of the silicone sealing strip 404 is L-shaped. The lifting plate 403 is fixed to the movable end of the sealing electric telescopic rod 401. The lifting plate 403 and the silicone sealing strip 404 are controlled by the sealing electric telescopic rod 401 to seal the bottom of the key shell.

[0029] The workpiece bottom gap sealing module 4 also includes a shielding curtain 402. The shielding curtain 402 is fixed to the bottom of the lifting plate 403 and located outside the four enclosed electric telescopic rods 401. The height of the shielding curtain 402 is greater than the extension length of the piston rod of the enclosed electric telescopic rod 401. The shielding curtain 402 is used to shield the piston rod of the lifting plate 403, thereby preventing paint from adhering to the outside of the piston rod of the enclosed electric telescopic rod 401 during the spraying operation, and thus preventing paint from entering the interior of the enclosed electric telescopic rod 401 as the piston rod of the enclosed electric telescopic rod 401 is retracted.

[0030] A spraying apparatus includes a spraying fixture for the curved, irregularly shaped surface of a key housing.

[0031] When spraying the curved surface of the key's outer shell, the power supply 103 is turned on, and current is supplied to the adjusting electric telescopic rod 203, the closing electric telescopic rod 401 and the electromagnet 311 through the power supply 103. After the electromagnet 311 is energized, it magnetically attracts the magnetic metal plate 302 downward. The magnetic attraction force generated at this time is greater than the sum of the elastic force of the metal spring 308 and the elastic force of the auxiliary support spring 312. The magnetic metal plate 302 moves downward until it contacts the electromagnet 311. The inelastic connecting rope 306 applies a pulling force to the clamping plate 3041, causing the rotating card seat 3043 to rotate inside the mounting slot 310 and causing the unfolding angle of the metal spring 308 to decrease. The key shell to be painted is then placed above the two rotating support plates 202. After placement, the current supply of the power supply 103 to the electromagnet 311 is cut off. The electromagnet 311 loses its magnetic attraction to the magnetic metal plate 302. The metal spring 308 and the auxiliary support spring 312 simultaneously return to their elastic state. The metal spring 308 drives the rotating locking seat 3043 to rotate and reset the closed electric telescopic rod 401. After the closed electric telescopic rod 401 is reset, it presses the anti-slip pad 305 against the inner wall of the key shell. The anti-slip pad 305 applies outward pressure to the key shell. Multiple internal clamping claws 304 clamp the key from the inside of the key shell to fix its position. Next, the two adjusting electric telescopic rods 203 are activated simultaneously and pull the two rotating support plates 202 downward, causing the rotating support plates 202 to rotate downward and separate from the bottom of the key housing. At this time, the four enclosed electric telescopic rods 401 are activated simultaneously and drive the lifting plate 403 to move upward. The lifting plate 403 drives the silicone sealing strip 404 to move upward. The silicone sealing strip 404 contacts the bottom of the key housing and pushes the key housing upward until the key housing contacts the limiting strip 3042 and is restricted in position. The silicone sealing strip 404 is compressed and deformed and enters the gap between the key housing and the enclosed electric telescopic rods 401. At the same time, the silicone sealing strip 404 fills the gap between the key housing and the lifting plate 403. Finally, the spraying equipment is started to spray the paint onto the curved surface of the key shell and the side of the key shell. During this process, since the entire outer side of the key shell is unobstructed, there are no areas missed during spraying. Furthermore, the bottom of the key shell is sealed by the silicone sealing strip 404, the lifting plate 403, and the shielding curtain 402, which can prevent the paint from contaminating the inside of the key shell, the internal positioning module 3 of the workpiece, and the piston rod of the closed electric telescopic rod 401.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A spraying fixture for the curved, irregularly shaped surface of a key shell, characterized in that: include: The fixture base module (1) includes a fixing plate (101) and a positioning base block (102), which serve as the base of the entire fixture and are fixedly installed to ensure the stability of the fixture. The workpiece support module (2) includes a fixed base (201), a rotating support plate (202), and an adjustable electric telescopic rod (203). The adjustable electric telescopic rod (203) supports the rotating support plate (202) and controls the rotation of the rotating support plate (202). The rotating support plate (202) supports the key housing. The workpiece internal positioning module (3) includes a base plate (301), a bottom plate (307), an internal clamping claw (304), a non-elastic connecting rope (306), a magnetic metal plate (302), and an electromagnet (311). The bottom plate (307) is detachably installed at the bottom of the base plate (301). The internal clamping claw (304) is rotatably installed between the base plate (301) and the bottom plate (307). The internal clamping claw (304) is fixed to the magnetic metal plate (302) by the non-elastic connecting rope (306). The electromagnet (311) is fixed inside the base plate (301) and magnetically attracted to the magnetic metal plate (302). The internal clamping claw (304) is used to press the inner wall of the key shell outward to achieve the internal positioning of the key shell. The bottom gap sealing module (4) of the workpiece includes a sealing electric telescopic rod (401), a lifting plate (403) and a silicone sealing strip (404). The silicone sealing strip (404) is fixed on the surface of the lifting plate (403) and the cross section of the silicone sealing strip (404) is L-shaped. The lifting plate (403) is fixed at the movable end of the sealing electric telescopic rod (401). The lifting plate (403) and the silicone sealing strip (404) are controlled by the sealing electric telescopic rod (401) so that the bottom of the key shell is sealed by the lifting plate (403) and the silicone sealing strip (404).

2. The spraying fixture for the curved, irregularly shaped surface of a key shell according to claim 1, characterized in that: The fixture base module (1) also includes a power supply (103). The power supply (103) is located inside the positioning base block (102), and heat dissipation vents (104) are provided on both sides of the bottom of the positioning base block (102). The power supply (103) is connected to the electromagnet (311), the closed electric telescopic rod (401), and the adjusting electric telescopic rod (203) through wires. The wire connected to the electromagnet (311) passes through the base plate (301), and the remaining wires pass through the heat dissipation vents (104).

3. A spraying fixture for curved, irregularly shaped surfaces of key shells according to claim 2, characterized in that: The base plate (307) is fitted on the outer side of the top of the positioning base block (102) and connected to the positioning base block (102) by screws. Two support rods (303) are fixed on the upper surface of the base plate (301). The inelastic connecting rope (306) passes over the support rods (303) and slides in contact with the inelastic connecting rope (306). Multiple auxiliary support springs (312) are fixed between the bottom of the magnetic metal plate (302) and the base plate (301).

4. A spraying fixture for curved, irregularly shaped surfaces of key shells according to claim 3, characterized in that: The substrate (301) has mounting slots (310) on both sides. The bottom end of the substrate (301) is rotatably engaged in the mounting slot (310). The upper surface of the base plate (307) is fixed with multiple limiting support blocks (309). The limiting support blocks (309) are engaged in the mounting slot (310) and contact the bottom of the internal clamping claw (304).

5. A spraying fixture for curved, irregularly shaped surfaces of key housings according to claim 4, characterized in that: The upper surface of the limiting support block (309) is provided with an arc-shaped curved surface, which is consistent with the curvature of the outer surface of the bottom end of the internal clamping claw (304).

6. A spraying fixture for curved, irregularly shaped surfaces of key housings according to claim 5, characterized in that: The bottom of the internal clamping claw (304) is fixed with a metal spring (308). The metal spring (308) is V-shaped and one end is clamped and fixed by the limiting support block (309) and the base plate (301).

7. A spraying fixture for curved, irregularly shaped surfaces of key housings according to claim 6, characterized in that: The internal clamping claw (304) includes a clamping plate (3041), with an anti-slip pad (305) embedded at the top of the clamping plate (3041) and a rotating snap-fit ​​seat (3043) fixed at the bottom of the clamping plate (3041). The rotating snap-fit ​​seat (3043) is a cylindrical structure, and a docking groove (3044) is provided at the top of the rotating snap-fit ​​seat (3043). A metal spring (308) is fixed inside the docking groove (3044), and a limit strip (3042) is fixed on the outer surface of the clamping plate (3041).

8. A spraying fixture for curved, irregularly shaped surfaces of key shells according to claim 1, characterized in that: The fixed base (201) and the enclosed electric telescopic rod (401) are both fixed on the upper surface of the fixed plate (101). The bottom and top ends of the adjustable electric telescopic rod (203) are rotatably connected to the fixed base (201) and the rotating support plate (202) through shaft pins. The two adjustable electric telescopic rods (203) and the four enclosed electric telescopic rods (401) are all equipped with encoders and displacement sensors to achieve closed-loop synchronous control.

9. A spraying fixture for curved, irregularly shaped surfaces of key housings according to claim 8, characterized in that: The workpiece bottom gap sealing module (4) also includes a shielding curtain (402), which is fixed to the bottom of the lifting plate (403) and located outside the four closed electric telescopic rods (401). The height of the shielding curtain (402) is greater than the extension length of the piston rod of the closed electric telescopic rod (401).

10. A spraying device, characterized in that: Including the spraying fixture for curved or irregularly shaped surfaces of key housings as described in any one of claims 1-9.

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