Key-type universal changeover switch

Abstract

The application discloses a key type universal conversion switch, which comprises a switch main body and a key knob, the key knob comprises a sleeve, a lock core and a coupling, a fool-proof structure is arranged at the connecting position of the switch main body and the key knob, and a positioning slot is formed in the switch main body and used for inserting an insertion part of the sleeve; the fool-proof structure comprises a central insertion shaft arranged in the positioning slot and a central insertion hole formed in the coupling and used for inserting the central insertion shaft, a strip-shaped convex ridge is formed around the central insertion shaft, and a strip-shaped recess is formed in the inner wall of the central insertion hole; a locking buckle assembly is arranged on the switch main body, the locking buckle assembly mainly comprises a locking ring and a locking operation rod connected to the locking ring, a locking protrusion is protruded on the inner wall of the locking ring, and a locking side groove is formed on the outer wall of the insertion part and used for embedding the locking protrusion. The application has the advantages of reasonable and compact structure, high stability, convenient and fast installation, flexible, diverse, comprehensive design, low cost, high safety in use and long service life, and can meet the diversified needs of customers.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of universal switch, in particular to a key type universal switch. BACKGROUND

[0002] In the existing universal switch products, there are the following deficiencies:

[0003] (1) The handle type universal switch in the actual use scene, the operator is exposed outside the instrument, the non-related professional personnel can touch the operation, causing certain security risks.

[0004] (2) Due to the limitation of the connection structure between the key button and the switch body, there is no indication during installation, which is not only inconvenient to install, but also has low stability after installation; moreover, the key button and the switch body are randomly installed, thereby damaging the product.

[0005] (3) In the key button structure, the key pull-out position design is single, which cannot meet the different requirements of customers for the key pull-out position; moreover, when the customers have different requirements for the key pull-out position, the product needs to be processed multiple times, which is high in cost.

[0006] (4) The key hole of the key button is exposed, and dust, water vapor, foreign matter and the like often enter, which has a great influence on the internal structure and affects the product performance.

[0007] (5) The metal lock core and the plastic coupling are only connected through the square connecting shaft in the middle, and the square connecting shaft is used to perform transmission under stress, and after long-term use, the plastic coupling is prone to deformation at the connection, thereby affecting the transmission between the metal lock core and the plastic coupling, and the transmission reliability is low.

[0008] (6) The dustproof and waterproof performance of the key button is low, which affects the product performance.

[0009] (7) When the customer has different requirements for the shape and size of the front ring of the key button, the front ring needs to be redesigned and processed, but it cannot be connected with the sleeve. SUMMARY

[0010] In view of the above deficiencies, the purpose of the present application is to provide a key type universal switch, which has reasonable and compact structure, high stability, convenient and fast installation, flexible, diverse and comprehensive design, can meet the diversified needs of customers, is low in cost, high in use safety and long in service life.

[0011] The technical scheme adopted by the present application to achieve the above purpose is:

[0012] A key type universal switch includes a switch body and a key knob connected to the switch body, the key knob includes a sleeve, a lock cylinder arranged in the sleeve, and a coupling arranged in the sleeve and connected to the lower end of the lock cylinder, characterized in that a foolproof structure is arranged at the connection between the switch body and the key knob, the lower end of the sleeve is provided with an insertion part, and a positioning slot for the insertion part is formed on the switch body; the foolproof structure includes a central insertion shaft arranged in the positioning slot and a central insertion hole formed on the coupling and for the central insertion shaft, wherein at least one strip-shaped convex rib is formed on the outer periphery of the central insertion shaft, and at least one strip-shaped recess is formed on the inner wall of the central insertion hole and matched with the strip-shaped convex rib; meanwhile, a locking buckle assembly for locking the key knob is arranged on the switch body, the locking buckle assembly mainly consists of a locking ring arranged around the outer periphery of the central insertion shaft and a locking operating lever connected to the outside of the locking ring, wherein at least one locking convex block is inwardly arranged on the inner wall of the locking ring, and at least one locking side groove for the locking convex block is formed on the outer wall of the insertion part.

[0013] As a further improvement of the present application, a rotation prevention positioning convex is arranged on the inner wall of the positioning slot, and a rotation prevention positioning recess for the rotation prevention positioning convex is recessed on the outer wall of the insertion part; at least one positioning block is inwardly arranged on the inner wall of the positioning slot, and at least one positioning groove for the positioning block is formed on the outer wall of the insertion part.

[0014] As a further improvement of the present application, a positioning assembly arranged around the outer periphery of the lock cylinder is arranged in the sleeve, wherein the positioning assembly includes a positioning cylinder, and a plurality of accommodation grooves are formed on the inner wall of the positioning cylinder and uniformly and longitudinally distributed on the inner wall of the positioning cylinder.

[0015] As a further improvement of the present application, the positioning assembly further includes a plurality of plug columns arranged in the accommodation grooves of the positioning cylinder, and every two plug columns are oppositely arranged in oppositely arranged two accommodation grooves.

[0016] As a further improvement of the present application, a plurality of clamping blocks are arranged on the outer wall of the positioning cylinder, and a plurality of clamping grooves for the clamping blocks are formed on the inner wall of the sleeve; the positioning cylinder mainly consists of a lower cylinder part and an upper cylinder part outwardly arranged on the upper end of the lower cylinder part, wherein the plurality of clamping blocks are formed on the outer wall of the upper cylinder part; an inner groove body for the insertion of the lower cylinder part is formed in the inner part of the sleeve, an annular convex is inwardly arranged on the upper part of the inner groove body for supporting the upper cylinder part, and the plurality of clamping grooves are formed on the inner wall of the inner groove body and above the annular convex.

[0017] As a further improvement of the present application, a keyhole is formed on the lock cylinder, and a blocking hole structure is arranged on the keyhole, which includes a blocking hole block arranged on the keyhole and a spring arranged behind the blocking hole block.

[0018] As a further improvement of the present application, a movable limiting groove for the blocking hole block to be embedded and movable is formed on the side of the keyhole of the lock cylinder, and a spring movable groove for the spring to be embedded is formed in the movable limiting groove; a limiting groove is formed on the side of the blocking hole block close to the spring, and the spring is located between the inner wall of the spring movable groove and the limiting groove; a first key half insertion groove is formed on the side of the keyhole of the lock cylinder, and a second key half insertion groove matched with the first key half insertion groove is formed on the side of the blocking hole block.

[0019] As a further improvement of the present application, at least one key slot is formed on the lower end of the lock cylinder, and at least one clamping key is arranged on the end of the coupling shaft to be clamped into the key slot; meanwhile, a connecting insertion block is protruded downward at the center position of the lower end surface of the lock cylinder, and a connecting insertion groove for the connecting insertion block to be inserted is formed on the upper end surface of the coupling shaft, the key slot is formed on the outer side edge of the connecting insertion block, and the clamping key is formed on the outer side edge of the connecting insertion groove.

[0020] As a further improvement of the present application, a sealing ring is sleeved on the periphery of the coupling shaft, and the outer wall of the sealing ring is in contact with the inner wall of the sleeve for sealing.

[0021] As a further improvement of the present application, a front ring is sleeved on the periphery of the upper part of the sleeve, and the front ring is connected with the sleeve by a threaded structure, which mainly consists of an internal thread formed on the inner wall of the front ring and an external thread formed on the periphery of the sleeve and matched with the internal thread.

[0022] The present application has the following advantages:

[0023] (1) The key type universal conversion switch is used to replace the traditional handle type universal conversion switch, and only the matched key can operate the universal conversion switch, thereby the product use safety can be greatly improved.

[0024] (2) The combination of the strip-shaped convex ridge and the strip-shaped groove forms the fool-proof structure design, so that the center insertion shaft can be inserted into the center insertion hole only when the strip-shaped convex ridge is aligned with the strip-shaped groove, otherwise, it cannot be inserted. Therefore, when the customer has requirements on the initial position operation angle of the key, the initial installation position of the key button and the switch body can be limited by the combination of the strip-shaped convex ridge and the strip-shaped groove, so that the required initial position operation angle can be obtained. Therefore, not only the installation indication function is achieved, but also the function of preventing random installation and damaging the product is achieved, that is, the good fool-proof function is achieved, which brings great convenience to the installation and makes the installation more convenient and fast.

[0025] (3) Through the special structure design of the locking buckle assembly composed of the locking ring and the locking operating lever, the key knob can be stably locked on the switch main body, the structural stability of the whole product is improved, the product performance is improved, the installation and disassembly of the key knob and the switch main body are facilitated, the operation is convenient and fast, and time is saved.

[0026] (4) Through the special structure design of the positioning assembly composed of the positioning cylinder or the positioning cylinder combined with the plug column, zero key pulling-out position or at least one key pulling-out position can be obtained, and four and six gears can be obtained, the design is more comprehensive, flexible and diversified, the specific needs can be freely selected and set, different requirements of customers for the position and number of the key pulling-out position are met. Meanwhile, two kinds of positioning cylinder structures are adopted, only two times of mold opening are needed during the processing of the positioning cylinder, and the cost is reduced.

[0027] (5) Through the special structure design of the hole blocking structure composed of the hole blocking block on the lock cylinder and the spring, the key insertion hole can be blocked whether during the insertion of the key or after the pulling-out of the key, and good protection effects of dust prevention, water prevention and foreign matter prevention are achieved.

[0028] (6) Through the cooperation of the connecting plug of the lock cylinder and the connecting slot of the shaft coupling, the middle connection between the shaft coupling and the lock cylinder is realized, and then the clamping structure between the clamping key of the shaft coupling and the key groove of the lock cylinder is combined to realize the side edge reinforced connection between the shaft coupling and the lock cylinder. Therefore, the structural stability of the combination of the shaft coupling and the lock cylinder can be significantly improved, even after long time use, no false position will be caused due to deformation, thus the functions of false position prevention and fatigue damage prevention are achieved, the transmission reliability is improved, and the service life of the product is prolonged.

[0029] (7) The sealing ring is sleeved on the periphery of the shaft coupling, and the outer wall of the sealing ring is in contact with the inner wall of the sleeve for sealing, so that the sealing, dust prevention and water prevention effects can be achieved, and the IP65 level can be reached.

[0030] (8) Through the special structure design of the threaded structure connection between the front ring and the sleeve, the screw connection of the front ring and the sleeve can be realized, thus the shape and size of the front ring can be designed to meet the diversified needs of customers, and only the internal thread formed in the front ring is needed to be screwed with the external thread on the periphery of the sleeve. Therefore, through the threaded structure connection between the front ring and the sleeve, the shape and size of the front ring can be flexibly changed, the diversified design of the front ring is realized, the diversified customization of customers is facilitated, the replacement of the front ring is facilitated, and the diversified needs of users are met.

[0031] The above is the summary of the technical scheme, and the invention will be further described in combination with the drawings and the specific embodiments. DRAWINGS

[0032] Figure 1 Fig. 1 is a schematic diagram of the overall structure of the present application;

[0033] Figure 2 Fig. 2 is an exploded view of the switch body and key knob of the present application;

[0034] Figure 3 Fig. 3 is a schematic diagram of the structure of the switch body of the present application;

[0035] Figure 4 Fig. 4 is a schematic diagram of the structure of the key knob of the present application;

[0036] Figure 5 Fig. 5 is a schematic diagram of the structure of the lock catch assembly of the present application;

[0037] Figure 6 Fig. 6 is an exploded view of the key knob of the present application;

[0038] Figure 7 Fig. 7 is a sectional view of the key knob of the present application;

[0039] Figure 8 Fig. 8 is a schematic diagram of the structure of the sleeve of the present application;

[0040] Figure 9 Fig. 9 is a schematic diagram of the structure of the positioning cylinder of the present application;

[0041] Figure 10 Fig. 10 is a schematic diagram of the structure of the positioning cylinder with the plug column inserted therein of the present application;

[0042] Figure 11 Fig. 11 is a schematic diagram of the structure of the positioning cylinder with a key pulling-out position reserved therein of the present application;

[0043] Figure 12 Fig. 12 is another schematic diagram of the structure of the positioning cylinder of the present application;

[0044] Figure 13 Fig. 13 is another schematic diagram of the structure of the positioning cylinder with the plug column inserted therein of the present application;

[0045] Figure 14 Fig. 14 is another schematic diagram of the structure of the positioning cylinder with a key pulling-out position reserved therein of the present application;

[0046] Figure 15 Fig. 15 is a schematic diagram of the structure of the positioning cylinder with two key pulling-out positions reserved therein of the present application;

[0047] Figure 16 Fig. 16 is a schematic diagram of the upper structure of the lock cylinder of the present application;

[0048] Figure 17 Fig. 17 is a schematic diagram of the bottom structure of the lock cylinder of the present application;

[0049] Figure 18Fig. 1 is a schematic view of the connection structure of the lock cylinder and the shaft coupling in the present application;

[0050] Figure 19 Fig. 2 is a schematic view of the structure of the shaft coupling in the present application. DETAILED DESCRIPTION

[0051] In order to further clarify the technical means and effects of the present application, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0052] Please refer to Figures 1 to 4 The present application provides a key type universal switch, which comprises a switch body 1, a key knob 2 connected to the switch body 1, and a foolproof structure 3 arranged at the connection between the switch body 1 and the key knob 2. The arrangement of the foolproof structure 3 facilitates the assembly of the key knob 2 to the switch body 1.

[0053] In the present embodiment, the key knob 2 comprises a sleeve 21, a lock cylinder 22 arranged in the sleeve 21, and a shaft coupling 23 arranged in the sleeve 21 and connected to the lower end of the lock cylinder 22. Specifically, as shown in Figure 2 The lower end of the sleeve 21 has an insertion part 211, and a positioning slot 11 is formed on the switch body 1 for the insertion of the insertion part 211. When installing, the insertion part 211 is inserted into the positioning slot 11.

[0054] Specifically, the foolproof structure 3 comprises a central insertion shaft 31 arranged in the positioning slot 11, and a central insertion hole 32 formed on the shaft coupling 23 for the insertion of the central insertion shaft 31, as shown in Figure 3 and Figure 4 In the present embodiment, at least one strip-shaped convex ridge 311 is formed on the periphery of the central insertion shaft 31, and at least one strip-shaped concave groove 321 matching the strip-shaped convex ridge 311 is formed on the inner wall of the central insertion hole 32. When the insertion part 211 is inserted into the positioning slot 11, the central insertion shaft 31 is aligned with the central insertion hole 32 and is inserted into the central insertion hole 32. At the same time, due to the existence of the strip-shaped convex ridge 311 on the periphery of the central insertion shaft 31 and the strip-shaped concave groove 321 on the inner wall of the central insertion hole 32, the central insertion shaft 31 can only be inserted into the central insertion hole 32 when the strip-shaped convex ridge 311 is aligned with the strip-shaped concave groove 321, i.e. when the key knob 2 is installed on the switch body 1.

[0055] In the present embodiment, as shown in Figure 3 The central insertion shaft 31 is in the shape of a cuboid, and the strip-shaped convex ridges 311 are formed on the four outer sides of the cuboid. Therefore, the number of the strip-shaped convex ridges 311 and the strip-shaped concave grooves 321 is four respectively. Of course, the central insertion shaft 31 can also be in other shapes, and the number of the strip-shaped convex ridges 311 and the strip-shaped concave grooves 321 can be set according to specific needs.

[0056] By the combination design of the strip-shaped convex 311 on the outer wall of the center shaft 31 and the strip-shaped groove 321 on the inner wall of the center hole 32, only when the strip-shaped convex 311 is aligned with the strip-shaped groove 321, the center shaft 31 can be inserted into the center hole 32, otherwise, it cannot be inserted. Thus, when the customer has a requirement for the initial position operating angle of the key 10, the initial installation position of the key knob 2 and the switch body 1 can be limited by the combination design of the strip-shaped convex 311 and the strip-shaped groove 321, that is, the required initial position operating angle can be obtained. Therefore, the combination design of the strip-shaped convex 311 on the outer wall of the center shaft 31 and the strip-shaped groove 321 on the inner wall of the center hole 32 not only plays a role of installation indication, but also prevents random installation and damage to the product, that is, it plays a good foolproof role, brings great convenience to installation, and makes installation more convenient and fast.

[0057] After the key knob 2 is installed into the switch body 1, in order to prevent the sleeve 21 from rotating with the lock cylinder 22 during operation, as shown in Figure 3 Figure 4 In this embodiment, a rotation-preventing positioning protrusion 12 is protruded on the inner wall of the positioning slot 11, and a rotation-preventing positioning groove 2111 is recessed on the outer wall of the insertion part 211 for embedding the rotation-preventing positioning protrusion 12. Because the rotation-preventing positioning protrusion 12 is clamped in the rotation-preventing positioning groove 2111, the sleeve 21 is stably positioned in the switch body 1 and cannot rotate relative to the switch body 1, that is, it plays a good rotation-preventing role. When the lock cylinder 22 is subsequently operated by using the key 10, only the lock cylinder 22 drives the coupling 23 to act on the switch body 1, and the sleeve 21 does not rotate, thereby improving the operation stability.

[0058] In this embodiment, as shown in Figures 3 to 5 ​As shown, a locking buckle assembly 4 is provided on the switch body 1 to lock the key button 2. Specifically, the locking buckle assembly 4 mainly consists of a locking ring 41 surrounding the central insertion shaft 31 and a locking operating rod 42 connected to the outside of the locking ring 41. At least one locking protrusion 411 is provided inwardly on the inner wall of the locking ring 41, and at least one locking side groove 2112 is formed on the outer wall of the insertion part 211 for the locking protrusion 411 to be inserted. When a force is applied to the locking operating rod 42, causing the locking ring 41 to rotate, the locking protrusion 411 is simultaneously moved into the locking side groove 2112 of the insertion part 211, and the key button 2 is locked on the switch body 1 and cannot be pulled out. When a reverse force is applied to the locking lever 42, the locking ring 41 rotates in the opposite direction, simultaneously causing the locking protrusion 411 to move out of the locking side groove 2112 of the insertion part 211, allowing the key button 2 to be pulled off the switch body 1. Thus, the special structural design of the locking buckle assembly 4 not only securely locks the key button 2 onto the switch body 1, improving the overall structural stability of the product and enhancing its performance, but also facilitates the installation and removal of both the key button 2 and the switch body 1, making operation convenient and quick.

[0059] To further improve the stability of the connection between the key button 2 and the switch body 1, such as Figure 3 and Figure 4 As shown, in this embodiment, at least one positioning block 13 protrudes inward on the inner wall of the positioning slot 11, and at least one positioning groove 2113 is formed on the outer wall of the insertion part 211 for the positioning block 13 to be inserted into. After the key button 2 is installed on the switch body 1, the positioning block 13 is positioned in the positioning groove 2113, which can effectively prevent lateral movement between the key button 2 and the switch body 1, thereby improving the structural stability after the two are combined.

[0060] In this embodiment, as Figure 6 and Figure 7 As shown, a positioning component 24 is provided inside the sleeve 21, surrounding the lock cylinder 22. The positioning component 24 includes a positioning cylinder 241, on the inner wall of which several clearance grooves 2411 are formed, such as... Figure 9 As shown. Specifically, the plurality of clearance grooves 2411 are evenly and longitudinally distributed on the inner wall of the positioning cylinder 241.

[0061] Preferably, there are 8 clearance slots 2411. Figure 9 As shown, the two oppositely arranged clearance slots 2411 combine to form a key removal position 240, so there are 4 key removal positions 240; therefore, when the lock cylinder 22 is operated by key 10, there is a position every 45°, and there are a total of 4 positions, and key 10 can be removed in each position.

[0062] Of course, the number of the accommodation slots 2411' of the positioning cylinder 241' can also be 12, as shown in Figure 12 Each two oppositely arranged accommodation slots 2411' combined can form a key pulling-out position 240', and there are 6 key pulling-out positions 240'. Therefore, when the key 10 is used to operate the lock cylinder 22, there are 6 positions, and the key 10 can be pulled out every 30°.

[0063] In actual application, some positions are set to be able to pull out the key 10, and some positions are set to be unable to pull out the key 10. Therefore, the positioning assembly 24 described in the embodiment further comprises a plurality of plug columns 242 arranged in the accommodation slots of the positioning cylinder 241, and every two plug columns 242 are oppositely arranged in the oppositely arranged two accommodation slots 2411. The combination of the positioning cylinder 241 and the plug column 242 can set zero key pulling-out position or at least one key pulling-out position.

[0064] Specifically, the number of the accommodation slots 2411 and the plug columns 242 on the positioning cylinder 241 can be as follows:

[0065] (1) As shown in Figure 9 and Figure 10 , the number of the accommodation slots 2411 on the positioning cylinder 241 is 8. When 8 plug columns 242 are arranged to fill the 8 accommodation slots 2411, there is no key pulling-out position, and the key 10 cannot be pulled out. When the number of the plug columns 242 is less than the number of the accommodation slots 2411, and at least two oppositely arranged accommodation slots 2411 are reserved, at least one key pulling-out position can be formed. As shown in Figure 11 , two oppositely arranged accommodation slots 2411 are reserved, and the two accommodation slots 2411 combined form a set of reserved accommodation slots 2411, which form a key pulling-out position 240. When the key 10 drives the lock cylinder 22 to rotate to the key pulling-out position 240, the key 10 can be pulled out. Of course, two sets of reserved accommodation slots 2411 can also be reserved, which form two key pulling-out positions 240. When the key 10 drives the lock cylinder 22 to rotate to the two key pulling-out positions 240, the key 10 can be pulled out.

[0066] (2) As shown in Figure 12 and Figure 13 , the number of the accommodation slots 2411' on the positioning cylinder 241' is 12. When 12 plug columns 242' are arranged to fill the 12 accommodation slots 2411', there is no key pulling-out position, and the key 10 cannot be pulled out. When the number of the plug columns 242' is less than the number of the accommodation slots 2411', and at least two oppositely arranged accommodation slots 2411' are reserved, at least one key pulling-out position can be formed. As shown inFigure 14 As shown, two relatively arranged leaving slots 2411' are reserved, and the two leaving slots 2411' combine to form a set of reserved leaving slots 2411', which form a key pulling-out position 240'. When the lock cylinder 22 is rotated to the key pulling-out position 240' by the key 10, the key 10 can be pulled out. Of course, two sets of reserved leaving slots 2411' can also be reserved, which form two key pulling-out positions 240', as shown in Figure 15 As shown, when the lock cylinder 22 is rotated to the two key pulling-out positions 240' by the key 10, the key 10 can be pulled out.

[0067] In this embodiment, the number of leaving slots 2411 and the number of plug columns 242 are both even, and the number of plug columns 242 is not greater than the number of leaving slots 2411, so that at least one key pulling-out position is achieved.

[0068] Through the special structural design of the positioning assembly 24 composed of the positioning cylinder 241 or the positioning cylinder 241 combined with the plug column 242, zero key pulling-out position or at least one key pulling-out position can be obtained, and four and six gears can be obtained, the design is diversified, and the position and number of key pulling-out positions can be freely selected and set according to specific needs to meet different requirements of customers on the position and number of key pulling-out positions. At the same time, the two positioning cylinder structures in this embodiment only need to be opened twice when the positioning cylinder is processed, which reduces the cost.

[0069] The internal structure of the lock cylinder 22 of this embodiment is similar to the conventional internal structure of the lock cylinder in the art. Specifically, when the key 10 is not inserted into the lock cylinder 22, as shown in Figure 16 As shown, a row of lock teeth 227 is exposed on the opposite sides of the lock cylinder 22, the lock teeth are clamped into the leaving slots 2411 of the positioning cylinder 241, and the lock cylinder 22 cannot be rotated; when the key 10 is inserted into the lock cylinder 22, the lock teeth on both sides of the lock cylinder 22 are retracted into the lock cylinder 22, and the lock cylinder 22 can be rotated.

[0070] For the combination of the positioning cylinder 241 and the sleeve 21, as shown in Figure 8 and Figure 9 As shown, a plurality of clamping blocks 2412 are protruded on the outer wall of the positioning cylinder 241, and a plurality of clamping grooves 212 are formed on the inner wall of the sleeve 21 for clamping the clamping blocks 2412. The positioning cylinder 241 is positioned in the sleeve 21 by the combination of the plurality of clamping blocks 2412 and the plurality of clamping grooves 212.

[0071] Specifically, as shown in Figure 9 The positioning cylinder 241 mainly consists of a lower cylinder part 2413 and an upper cylinder part 2414 which is protruded outward and arranged on the upper end of the lower cylinder part 2413, wherein the plurality of clamping blocks 2412 are formed on the outer wall of the upper cylinder part 2414; at the same time, as shown in Figure 8As shown, an inner groove 213 is formed inside the sleeve 21 for inserting the lower cylinder part 2413, and an annular boss 214 is protruded inwardly on the upper part of the inner groove 213 for supporting the upper cylinder part 2414. The plurality of clamping grooves 212 are formed on the inner wall of the inner groove 213 and above the annular boss 214. The special structure of the sleeve 21 and the positioning cylinder 241 is matched to realize the close positioning and installation of the positioning cylinder 241 in the sleeve 21.

[0072] In this embodiment, as shown, Figure 16 A key insertion hole is formed on the lock core 22, and a blocking hole structure 222 is arranged on the key insertion hole. Specifically, the blocking hole structure 222 includes a blocking hole block 2221 arranged on the key insertion hole and a spring 2222 arranged behind the blocking hole block 2221. The blocking hole block 2221 and the spring 2222 are combined to play a good dustproof, waterproof, and foreign matter-proof role on the key insertion hole of the lock core 22.

[0073] Specifically, an active limiting groove 223 is formed on the lock core 22 and located on the side of the key insertion hole for embedding and moving the blocking hole block 2221, and a spring active groove 224 is formed in the active limiting groove 223 for embedding the spring 2222. A limiting groove 22211 is formed on the side of the blocking hole block 2221 close to the spring 2222, and the spring 2222 is located between the inner wall of the spring active groove 224 and the limiting groove 22211.

[0074] At the same time, a first key half insertion groove 220 is formed on the lock core 22 and located on the side of the key insertion hole, and a second key half insertion groove 22212 is formed on the side of the blocking hole block 2221 and matched with the first key half insertion groove 220.

[0075] When the key 10 applies force to the first key half insertion groove 220 and the second key half insertion groove 22212, the applied force can move the blocking hole block 2221 in the active limiting groove 223, so as to open the key insertion hole below and compress the spring 2222, because the blocking hole block 2221 is actively arranged in the active limiting groove 223. Thus, the key 10 can be inserted into the key insertion hole, and the entire key insertion hole is filled with the key 10. When the key 10 is pulled out, the blocking hole block 2221 is pushed in the opposite direction by the elastic restoring force of the spring 2222, so that the blocking hole block 2221 is reset to block the key insertion hole again. Therefore, the key insertion hole can be blocked when the key 10 is inserted or pulled out, which plays a good dustproof, waterproof, and foreign matter-proof role.

[0076] In order to improve the stability of the connection between the lock core 22 and the shaft coupling 23, as shown, Figures 17 to 19As shown, at least one key slot 225 is formed at the lower end of the lock cylinder 22, and at least one clamping key 231 is arranged on the end of the coupling 23 to be clamped into the key slot 225. By clamping the clamping key 231 of the coupling 23 into the key slot 225 of the lock cylinder 22, the coupling 23 and the lock cylinder 22 are firmly connected, and the transmission is more reliable.

[0077] Meanwhile, a connecting plug 226 is protruded downward at the center of the lower end surface of the lock cylinder 22, and a connecting slot 232 is formed at the upper end surface of the coupling 23 to be inserted by the connecting plug 226. The key slot 225 is formed on the outer side of the connecting plug 226, and the clamping key 231 is formed on the outer side of the connecting slot 232.

[0078] The number of the key slot 225 and the clamping key 231 can be set according to the specific situation, and preferably, the number of the key slot 225 is two, and the two key slots 225 are oppositely arranged; the number of the clamping key 231 is two, and the two clamping keys 231 are oppositely arranged.

[0079] By cooperating the connecting plug 226 of the lock cylinder 22 with the connecting slot 232 of the coupling 23, the middle connection between the coupling 23 and the lock cylinder 22 is realized, and in combination with the clamping structure between the clamping key 231 of the coupling 23 and the key slot 225 of the lock cylinder 22, the side edge reinforced connection between the coupling 23 and the lock cylinder 22 is realized. Therefore, the structural stability of the combination of the coupling 23 and the lock cylinder 22 can be significantly improved, and even after long time use, no false position will be caused due to deformation, so that the transmission is more reliable.

[0080] In order to prevent dust, moisture and the like from entering the lock cylinder 22, as shown in Figure 6 , Figure 7 and Figure 18 As shown, a sealing ring 25 is arranged around the coupling 23, and the outer wall of the sealing ring 25 is in contact with the inner wall of the sleeve 21 to achieve sealing, which plays a role in dustproof and waterproof, and can reach IP65 level.

[0081] In the structure design of the key button 2, a front ring 26 is usually peripherally sleeved on the upper part of the sleeve 21. Different customers have different requirements for the shape and size of the front ring 26. In order to enable different front rings to be connected with the sleeve 21, the connecting structure between the two is improved in the embodiment, that is, the front ring 26 and the sleeve 21 are connected by a threaded structure 27. Specifically, the threaded structure 27 mainly consists of an internal thread 271 formed on the inner wall of the front ring 26 and an external thread 272 formed on the periphery of the sleeve 21 and matched with the internal thread 271. The combination of the internal thread 271 and the external thread 272 can realize the screw connection of the front ring 26 and the sleeve 21. Therefore, the shape and size of the front ring 26 can be designed to meet the diversified needs of customers, and as long as the internal thread 271 is formed in the front ring 26 to be screwed with the external thread 272 on the periphery of the sleeve 21. In this way, by connecting the front ring 26 and the sleeve 21 by the threaded structure 27, the shape and size of the front ring 26 can be flexibly changed, the diversified design of the front ring 26 can be realized, the diversified customization of customers can be facilitated, the replacement of the front ring can be facilitated, and the diversified needs of users can be met.

[0082] The above is only a preferred embodiment of the present application, and does not limit the technical scope of the present application. Therefore, other structures obtained by using the same or similar technical features as the above-described embodiments of the present application are within the scope of protection of the present application.

Claims

1. A key-type universal changeover switch comprising a switch main body, and a key knob connected to the switch main body, the key knob comprising a sleeve, a lock cylinder provided in the sleeve, and a coupling provided in the sleeve and connected to a lower end of the lock cylinder, characterized in that, A foolproof structure is arranged at the connection between the switch body and the key button, the sleeve lower end has an insertion part, a positioning slot is formed on the switch body for the insertion part to be inserted; the foolproof structure includes a central insertion shaft arranged in the positioning slot, and a central insertion hole formed on the coupling for the central insertion shaft to be inserted, wherein at least one strip-shaped convex rib is formed on the outer periphery of the central insertion shaft, and at least one strip-shaped recess is formed on the inner wall of the central insertion hole and matched with the strip-shaped convex rib; at the same time, a locking buckle assembly is arranged on the switch body to lock the key button, the locking buckle assembly is composed of a locking ring arranged around the outer periphery of the central insertion shaft, and a locking operating lever connected to the outside of the locking ring, wherein at least one locking protrusion is inwardly protruded on the inner wall of the locking ring, and at least one locking side groove is formed on the outer wall of the insertion part for the locking protrusion to be embedded; a rotation prevention positioning protrusion is protruded on the inner wall of the positioning slot, and a rotation prevention positioning recess is recessed on the outer wall of the insertion part for the rotation prevention positioning protrusion to be embedded; at least one positioning block is inwardly protruded on the inner wall of the positioning slot, and at least one positioning groove is formed on the outer wall of the insertion part for the positioning block to be clamped; a positioning assembly is arranged around the outer periphery of the lock cylinder in the sleeve, wherein the positioning assembly includes a positioning cylinder, a plurality of accommodation grooves are formed on the inner wall of the positioning cylinder, and the plurality of accommodation grooves are uniformly and longitudinally distributed on the inner wall of the positioning cylinder; a key insertion hole is formed on the lock cylinder, and a blocking hole structure is arranged on the key insertion hole, the blocking hole structure includes a blocking hole block arranged on the key insertion hole, and a spring arranged behind the blocking hole block.

2. The key-type universal switch according to claim 1, characterized by The positioning assembly further includes a plurality of plug columns arranged in the accommodation grooves of the positioning cylinder, and each two plug columns are oppositely arranged in the oppositely arranged two accommodation grooves.

3. The key-type universal switch according to claim 1, wherein A plurality of clamping blocks are protruded on the outer wall of the positioning cylinder, and a plurality of clamping grooves are formed on the inner wall of the sleeve for the clamping blocks to be clamped; the positioning cylinder is composed of a lower cylinder part and an upper cylinder part protruded outwardly and arranged on the upper end of the lower cylinder part, wherein the plurality of clamping blocks are formed on the outer wall of the upper cylinder part; an inner groove body is formed in the sleeve for the lower cylinder part to be inserted, an annular protrusion for supporting the upper cylinder part is protruded inwardly on the upper part of the inner groove body, and the plurality of clamping grooves are formed on the inner wall of the inner groove body and located above the annular protrusion.

4. The key-type universal switch according to claim 1, characterized by An active limiting groove is formed on the lock cylinder and located on the side of the key insertion hole and for the blocking hole block to be embedded and moved, and a spring active groove is formed in the active limiting groove for the spring to be embedded; a limiting groove is formed on the side of the blocking hole block close to the spring, and the spring is located between the inner wall of the spring active groove and the limiting groove; a first key half insertion groove is formed on the lock cylinder and located on the side of the key insertion hole, and a second key half insertion groove is formed on the side of the blocking hole block and matched with the first key half insertion groove.

5. The key-type universal switch according to claim 1, wherein At least one key slot is formed at the lower end of the lock cylinder, and at least one clamping key is arranged at one end of the coupling shaft and clamped into the key slot. Meanwhile, a connecting plug is protruded downward at the center of the lower end surface of the lock cylinder, and a connecting slot is formed at the upper end surface of the coupling shaft for the connecting plug to be inserted into. The key slot is formed at the outer side of the connecting plug, and the clamping key is formed at the outer side of the connecting slot.

6. The key-type universal switch according to claim 1, wherein A sealing ring is sleeved on the outer periphery of the coupling shaft, and the outer wall of the sealing ring is in contact with the inner wall of the sleeve to seal.

7. The key-type universal switch according to claim 1, wherein A front ring is sleeved on the upper periphery of the sleeve, and the front ring is connected with the sleeve by a threaded structure. The threaded structure mainly consists of an internal thread formed on the inner wall of the front ring and an external thread formed on the outer periphery of the sleeve and matched with the internal thread.

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