Push rod connecting structure capable of improving sealing performance of switch and switch

Abstract

The utility model relates to a kind of push rod connecting structure and switch capable of improving switch sealing performance, including switch shell and push rod, switch shell includes base and cover, and the same end side wall of base and cover is respectively provided with semicircular clamping slot, clamping slot includes first cooperation section, first embedding slot, second embedding slot and second cooperation section arranged in sequence, snap ring and dust cap are slidably sleeved on push rod, snap ring includes sealing section, positioning section and clamping section connected in sequence, dust cap one end is sleeved on positioning section and clamping section, the other end is sealingly connected on push rod, the outer wall of sealing section of snap ring is tightly matched with first embedding slot, positioning section, clamping section and second embedding slot, second cooperation section form the gap of "Z" shape, one end of dust cap is clamped in the gap and is positioned section radially abuts on the bottom surface of second embedding slot.The utility model realizes sealing by the tight cooperation of sealing section and first embedding slot, and then improve the sealing performance of switch, so that switch dustproof waterproof grade reaches IP67 level.

Description

Technical Field

[0001] This utility model belongs to the field of electrical switch technology, specifically relating to a push rod connection structure and switch that can improve the sealing performance of a switch. Background Technology

[0002] Push-button switches typically have a push rod that is movably inserted into the switch housing. Due to the relative movement between the push rod and the housing, gaps are unavoidable, allowing dust and moisture to enter the switch housing, contaminating the internal metal terminals, degrading switch performance, and even posing a short-circuit risk. To address this, Chinese utility model patent CN219144013U discloses a push rod sealing structure for a push-rod type speed control switch. This structure seals the gap between the housing and the push rod using a dust cap and a slip ring. However, in practical applications, while this sealing structure provides dust protection, the dustproof rating does not reach IP67, and the dustproof and waterproof performance remains unsatisfactory. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a push rod connection structure that can improve the sealing performance of the switch, and solve the technical problem that the current push rod connection structure still produces gaps that connect to the inside of the housing during the reciprocating motion of the push rod, causing dust to enter the housing.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a push rod connection structure that can improve the sealing performance of a switch, including a switch housing and a push rod inserted into the switch housing. The switch housing includes a base and a cover. A semi-circular slot is respectively opened on the same side wall of the base and the cover. The slots on the base and the cover are mirror symmetrical. Each slot includes a first mating section, a first recess, a second recess, and a second mating section arranged sequentially from the inside to the outside of the housing. The push rod is set in a through hole formed by the mating of the two slots. A retaining ring is slidably sleeved on the push rod, and a dust cap is also sleeved on it. The retaining ring includes a sealing section, a positioning section, and a locking section connected in sequence. One end of the dust cap is sleeved on the retaining ring. The positioning section and the snap-fit ​​section are connected at one end to the other end of the push rod and are sealed to the push rod. The outer wall of the sealing section of the snap ring is tightly fitted with the first groove. The positioning section is embedded in the second groove and abuts against the stepped surface between the first groove and the second groove. The snap-fit ​​section is located in the second mating section of the groove and one end of the snap-fit ​​section extends into the second groove and the other end extends out of the housing. The outer diameter of the positioning section of the snap ring is larger than the inner diameter of the second mating section and smaller than the inner diameter of the second groove. A "Z" shaped gap is formed between the positioning section, the snap-fit ​​section and the second groove and the second mating section. One end of the dust cap is snapped into the gap and is radially abutted against the bottom surface of the second groove by the positioning section. The inner end of the push rod passes through the snap ring and is adapted to the first mating section.

[0005] As a preferred embodiment, an annular groove is provided on the push rod located outside the housing, and one end of the dust cap is embedded in the annular groove and is in close contact with the annular groove.

[0006] As a preferred embodiment, the sealing section of the retaining ring is axially slidably connected to the first groove of the retaining groove, and the axial length of the sealing section is greater than the distance that the positioning section moves axially within the second groove.

[0007] As a preferred embodiment, the dust cap is open at both ends and has a wavy shape in the middle.

[0008] The technical problem to be solved by this utility model is to provide a switch that solves the technical problem that the current switch push rod connection structure still produces a gap that connects to the inside of the housing during the reciprocating motion of the push rod, causing dust to enter the housing.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a switch that uses the push rod connection structure that can improve the sealing performance of the switch.

[0010] As a preferred embodiment, the base has an annular and transparent connecting ring at its bottom periphery. When the cover is placed on the base, the lower end of the cover abuts against the connecting ring. The connecting ring and the lower end of the cover are connected by laser welding to achieve a seal. The connecting ring is disconnected at the end of the base where a slot is provided.

[0011] The beneficial effects of this utility model are as follows: This utility model sets a sealing section on the retaining ring and sets a first groove in the retaining groove. The sealing section and the first groove are tightly fitted to achieve a seal, preventing dust and moisture from entering the housing through the gap between the outer wall of the dust cap and the second groove, the second mating section, and the gap between the positioning section and the step surface caused by the axial movement of the retaining ring. This improves the sealing performance of the switch and makes the switch dustproof and waterproof. The waterproof rating can reach or even exceed the IP67 level. Attached Figure Description

[0012] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the combined state of the push rod connection structure that can improve the sealing performance of the switch according to this utility model; Figure 2 This is a schematic diagram of the exploded state of the push rod connection structure that can improve the sealing performance of the switch according to this utility model; Figure 3 This is an exploded view of a switch structure that adopts the push rod connection structure described in this utility model, which can improve the sealing performance of the switch. Figures 1-3In the middle: 1. Push rod; 2. Base; 3. Cover; 4. Slot; 401. First mating section; 402. First groove; 403. Second groove; 404. Second mating section; 405. Step surface; 5. Snap ring; 501. Sealing section; 502. Positioning section; 503. Snap-fit ​​section; 6. Dust cap; 7. Annular groove; 8. Connecting ring. Detailed Implementation

[0013] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings. Example 1

[0014] like Figure 1 The push rod connection structure shown improves the sealing performance of the switch, including a switch housing and a push rod 1 inserted into the switch housing. The switch housing includes a base 2 and a cover 3. A semi-circular groove 4 is respectively opened on the side wall of the same end of the base 2 and the cover 3. The grooves 4 on the base 2 and the cover 3 are mirror symmetrical. Each groove 4 includes a first mating section 401, a first recess 402, a second recess 403 and a second mating section 404 arranged sequentially from the inside to the outside of the housing. The push rod 1 is disposed in the through hole formed by the mating of the two grooves 4. A retaining ring 5 is slidably sleeved on the push rod 1, and a dust cap 6 is also sleeved on it. The retaining ring 5 includes a sealing section 501, a positioning section 502 and a locking section 503 connected sequentially. One end of the dust cap 6 is sleeved on the positioning section 502 and the locking section 503 of the retaining ring 5, and the other end extends outward from the push rod 1 and is sealed. The sealing section 501 of the retaining ring 5 is tightly fitted to the first groove 402. The positioning section 502 is embedded in the second groove 403 and abuts against the stepped surface 405 between the first groove 402 and the second groove 403. The snap-fit ​​section 503 is located in the second mating section 404 of the groove 4, with one end of the snap-fit ​​section 503 extending into the second groove 403 and the other end extending out of the housing. The outer diameter of the positioning section 502 of the retaining ring 5 is larger than the inner diameter of the second mating section 404 and smaller than the inner diameter of the second groove 403. A "Z"-shaped gap is formed between the positioning section 502, the snap-fit ​​section 403 and the second groove 403 and the second mating section 404. One end of the dust cap 6 is snapped into this gap and is radially abutted against the bottom surface of the second groove 403 by the positioning section 502. The inner end of the push rod 1 passes through the retaining ring 5 and is adapted to the first mating section 401.

[0015] The inner wall of the first groove 402 is smooth, and the outer wall of the sealing section 501 of the retaining ring 5 is smooth. The sealing section 501 and the first groove 402 fit together tightly to achieve a sealing effect.

[0016] An annular groove 7 is formed on the push rod 1 located outside the housing. One end of the dust cap 6 is embedded in the annular groove 7 and is tightly fitted to the annular groove 7 to achieve a seal. In practical applications, the end of the dust cap 6 is bonded to the annular groove 7 with adhesive.

[0017] In this embodiment, the sealing section 501 of the retaining ring 5 is axially slidably connected to the first groove 402 of the retaining groove 4. The axial length of the sealing section 501 is greater than the distance by which the positioning section 502 moves axially within the second groove 403. Under normal circumstances, the retaining ring 5 does not move with the push rod 1. If the retaining ring 5 moves with the push rod 1 due to an unexpected situation, the sealing section 501 will not slide out of the first groove 402, thereby ensuring a stable and reliable sealing connection between the sealing section 501 of the retaining ring 5 and the first groove 402, and ensuring that dust and moisture do not enter the switch housing from the groove 4.

[0018] like Figure 1 and Figure 2 As shown, the dust cap 6 in this embodiment is open at both ends and has a wavy shape in the middle. The dust cap 6 with this structure has good axial extensibility and sealing performance, and will not increase the resistance when the push rod 1 is pressed or reset.

[0019] The working principle of this embodiment is as follows: Figure 1 As shown, in this embodiment, the outer wall of one end of the dust cap 6 is first abutted against the bottom surface of the second groove 403 by the positioning section 502 to form a first seal. Then, the second seal is achieved by the tight fit between the sealing section 501 and the inner wall of the first groove 402, thereby improving the sealing performance of the switch at the push rod connection structure, enabling the switch to have dustproof and waterproof functions, and the waterproof performance reaches or even exceeds the IP67 level. Example 2

[0020] like Figure 3 The switch shown employs the push-rod connection structure described in Embodiment 1, which improves the switch's sealing performance. This further enhances the switch's sealing performance. In addition, this embodiment also features an annular and transparent connecting ring 8 on the bottom periphery of the base 2. When the cover 3 is placed on the base 2, its lower end abuts against the connecting ring 8. The cover 3 is made of opaque plastic. A laser is used to penetrate the connecting ring 8 and heat the lower end of the cover 3, melting the mating surface between the connecting ring 8 and the cover 3, thus achieving a seal by laser welding between the connecting ring 8 and the lower end of the cover 3. Since the base 2 and cover 3 are sealed at the end with the slot 4 through the push-rod connection structure described in Embodiment 1, the connecting ring 8 is disconnected at the end of the base 2 with the slot 4.

[0021] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A push rod connection structure that can improve the sealing performance of a switch, comprising a switch housing and a push rod (1) inserted into the switch housing, characterized in that, The switch housing includes a base (2) and a cover (3). A semi-circular slot (4) is provided on the same side wall of the base (2) and the cover (3). The slots (4) on the base (2) and the cover (3) are mirror symmetrical. Each slot (4) includes a first mating section (401), a first groove (402), a second groove (403), and a second mating section (404) arranged sequentially from the inside to the outside of the housing. The push rod (1) is set in the two slots (4). Inside the through hole formed by the mating of the push rod (1), a retaining ring (5) is slidably sleeved on the push rod (1), and a dust cap (6) is also sleeved on it. The retaining ring (5) includes a sealing section (501), a positioning section (502), and a snap-fit ​​section (503) connected in sequence. One end of the dust cap (6) is sleeved on the positioning section (502) and the snap-fit ​​section (503) of the retaining ring (5), and the other end extends outward from the push rod (1) and is sealed to the push rod (1). The sealing of the retaining ring (5) is... The outer wall of segment (501) is tightly fitted with the first groove (402). The positioning segment (502) is embedded in the second groove (403) and abuts against the stepped surface (405) between the first groove (402) and the second groove (403). The snap-fit ​​segment (503) is located in the second mating segment (404) of the slot (4), with one end of the snap-fit ​​segment (503) extending into the second groove (403) and the other end extending out of the housing. The outer diameter of the positioning segment (502) of the retaining ring (5) is... The inner diameter of the second mating section (404) is larger than that of the second groove (403). A "Z"-shaped gap is formed between the positioning section (502), the snap-fit ​​section (503), the second groove (403), and the second mating section (404). One end of the dust cap (6) is snapped into the gap and is radially abutted against the bottom surface of the second groove (403) by the positioning section (502). The inner end of the push rod (1) passes through the snap ring (5) and is adapted to the first mating section (401).

2. The push rod connection structure for improving switch sealing performance according to claim 1, characterized in that, An annular groove (7) is provided on the push rod (1) located outside the housing. One end of the dust cap (6) is embedded in the annular groove (7) and is tightly fitted with the annular groove (7) to achieve a seal.

3. The push rod connection structure for improving switch sealing performance according to claim 1, characterized in that, The sealing section (501) of the retaining ring (5) is axially slidably connected to the first groove (402) of the retaining groove (4), and the axial length of the sealing section (501) is greater than the distance of axial movement of the positioning section (502) in the second groove (403).

4. The push rod connection structure for improving switch sealing performance according to claim 1, characterized in that, The dust cap (6) is open at both ends and has a wavy shape in the middle.

5. A switch employing a push rod connection structure as described in any one of claims 1 to 4, which improves the sealing performance of the switch.

6. The switch according to claim 5, characterized in that, The base (2) has an annular and transparent connecting ring (8) on its bottom periphery. When the cover (3) is placed on the base (2), the lower end of the cover (3) abuts against the connecting ring (8). The connecting ring (8) and the lower end of the cover (3) are connected by laser welding to achieve a seal. The connecting ring (8) is disconnected at one end of the base (2) where a slot (4) is provided.

Images