Sealing structure of electric switch

Abstract

The utility model provides a sealing structure of an electric switch, which comprises a switch main body, a movable piece and a sealing piece, the movable piece is provided with a clamping shaft, the sealing piece is provided with a sealing ring sleeved on the clamping shaft and at least one convex part arranged on the outer wall of the sealing ring and extending outwards, the convex part is provided with a breaking joint, one end of the breaking joint extends to the outer edge of the convex part, and the other end of the breaking joint extends to the outer edge of the switch main body. The other end of the protruding part extends to an inner hole of the sealing ring, and a counter bore matched with the protruding part in shape is formed in the switch body. During assembly, the breaking joint of the convex part is pulled open, so that the clamping shaft of the movable part is clamped into the inner hole of the sealing ring, then an assembly formed by the movable part and the sealing part is assembled into the switch main body together, the convex part of the sealing part is inserted into the counter bore of the switch main body, and the breaking joint cannot be opened due to the limitation of the counter bore, so that the sealing ring always wraps the clamping shaft; compared with the prior art, the sealing element does not deform or move in the assembling process, the sealing reliability is guaranteed, the sealing element is more convenient to assemble, and the assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a sealing structure of an electric switch. Background Art

[0002] When electric tools are in use, a lot of dust will be generated. The dust can easily enter the inside of the button switch of the electric tool, causing the button switch to be poorly switched on and off, aggravating arcing and easily burning the contacts, thus seriously shortening the service life of the button switch.

[0003] The existing electric tool switch includes a switch body, a button for driving the switch on and off, and a reversing button 01 for driving the motor forward and reverse. The switch body includes a cover plate and a base that are buckled together, such as Figure 6 As shown, the reversing button 01 is in a Z shape, which includes a clamping shaft 02 located in the middle, and a handle 03 and a driving rod 04 arranged on both sides of the clamping shaft 02. The driving rod 04 is located inside the switch body, and the handle is located outside the switch body. A seal 05 is installed at the clamping shaft 02. There are two ways to install the seal: 1) as shown in FIG. Figure 6 As shown, the seal 05 is a closed annular seal ring. When installing, the seal ring needs to be pulled larger, installed from the lower end of the drive rod and moved to the clamping shaft. However, after the seal ring is pulled and deformed, it is usually difficult to restore its original shape, which greatly reduces the sealing effect; 2) As shown in FIG. Figure 7 As shown, the seal 05 is an annular sealing ring with a break 06. During assembly, the sealing ring is opened along the break and inserted into the clamping shaft. However, when the cover plate is buckled with the base, the cover plate may deform the sealing ring, making the break larger and posing a risk of dust entry. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of poor sealing shape in the prior art, thereby providing a sealing structure of an electric switch with high sealing reliability.

[0005] To this end, the utility model provides a sealing structure of an electric switch, including a switch body, a movable part and a sealing part, the movable part is provided with a clamping shaft, the sealing part has a sealing ring sleeved on the clamping shaft, and at least one convex portion provided on the outer wall of the sealing ring and extending outward, the convex portion is provided with a slit, one end of the slit extends to the outer edge of the convex portion, and the other end extends to the inner hole of the sealing ring, and the switch body is provided with a countersunk hole adapted to the shape of the convex portion.

[0006] The sealing member has a first convex portion, the first convex portion is provided with the break, the switch body comprises a cover plate and a base which are buckled with each other, and the base is formed with a first countersunk hole for the first convex portion to be inserted.

[0007] The sealing member further comprises a second convex portion, wherein the second convex portion and the first convex portion are arranged at two sides of the sealing ring, and the cover plate comprises a second countersunk hole for inserting the second convex portion.

[0008] The diameter of the first counterbore gradually decreases from the opening side toward the bottom.

[0009] The first convex portion, the sealing ring and the second convex portion are integrally injection molded.

[0010] The technical solution of the utility model has the following advantages:

[0011] 1. The sealing structure of the electric switch provided by the utility model comprises a switch body, a movable part and a sealing part, wherein the movable part is provided with a clamping shaft, the sealing part has a sealing ring, and at least one convex part provided on the outer wall of the sealing ring and extending outward, the convex part is provided with a slit, one end of the slit extends to the outer edge of the convex part, and the other end extends to the inner hole of the sealing ring, and the switch body is provided with a countersunk hole adapted to the shape of the convex part. During assembly, the slit of the convex part is pulled open so that the clamping shaft of the movable part is clamped into the inner hole of the sealing ring, and then the assembly formed by the movable part and the sealing part is installed into the switch body together, and the convex part of the sealing part is inserted into the countersunk hole of the switch body. Due to the limitation of the countersunk hole, the slit will not open, so that the sealing ring always wraps around the clamping shaft. Compared with the prior art, the sealing part will not deform or shift during the assembly process, thereby ensuring the sealing reliability, and the assembly of the sealing part is more convenient, thereby improving the assembly efficiency.

[0012] 2. The sealing structure of the electric switch provided by the utility model, the sealing member also has a second convex portion, the second convex portion and the first convex portion are arranged on both sides of the sealing ring, and the cover plate is provided with a second countersunk hole for the second convex portion to be inserted, and the second countersunk hole can better play a role in pressing and positioning the sealing member to ensure the sealing reliability.

[0013] 3. In the sealing structure of the electric switch provided by the utility model, the diameter of the first countersunk hole gradually decreases from the opening side toward the bottom, thereby facilitating the guiding insertion of the first protrusion and making assembly faster and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 is a cross-sectional view of the electric switch of the utility model;

[0016] Figure 2is a schematic diagram of the structure of the seal;

[0017] Figure 3 It is a schematic diagram of the assembly of the sealing parts and the moving parts;

[0018] Figure 4 It is a schematic diagram of the assembly of the moving parts, the sealing parts and the base;

[0019] Figure 5 is a schematic diagram of the structure of the base;

[0020] Figure 6 It is a schematic diagram of a first embodiment of a sealing ring and a reversing button in the prior art;

[0021] Figure 7 It is a schematic diagram of a second embodiment of a sealing ring and a reversing button in the prior art;

[0022] Description of reference numerals: 01, reversing button; 02, clamping shaft; 03, handle; 04, driving rod; 05, sealing element; 06, breaking seam;

[0023] 1. Switch body; 2. Movable part; 3. Sealing part; 4. Clamp shaft; 5. Sealing ring; 6. Break; 7. Inner hole; 8. First protrusion; 9. Cover plate; 10. Base; 11. First countersunk hole; 12. Second protrusion; 13. Second countersunk hole. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Example

[0029] This embodiment provides a sealing structure of an electric switch, such as Figure 1 As shown, it includes a switch body 1, a movable part 2 and a sealing part 3.

[0030] Switch body 1, such as Figure 1 and Figure 5 As shown, it includes a cover plate 9 and a base 10 that are interlocked with each other, the base 10 is formed with a first countersunk hole 11, and the cover plate 9 is formed with a second countersunk hole 13. The diameters of the first countersunk hole 11 and the second countersunk hole 13 gradually decrease from the opening side to the bottom.

[0031] The movable part 2 is used to drive the electric tool to rotate forward and reverse. Figure 3 and Figure 4 As shown, the movable part 2 is provided with a clamping shaft 4. It should be noted that the movable part 2 is an existing mature technology, so the working principle and specific structure of the movable part 2 driving the electric tool to rotate forward and reverse are not described in detail.

[0032] Seal 3, such as Figure 1 , Figure 2 Figure 3As shown, it has a sealing ring 5 sleeved on the clamping shaft 4, and at least one convex part arranged on the outer wall of the sealing ring 5 and extending outward, the convex part is provided with a slit 6, one end of the slit 6 extends to the outer edge of the convex part, and the other end extends to the inner hole 7 of the sealing ring 5, and the switch body 1 is provided with a countersink adapted to the shape of the convex part. In this embodiment, the sealing member 3 has a first convex part 8 and a second convex part 12 respectively arranged on both sides of the sealing ring 5, the first convex part 8 is provided with the slit 6, the first convex part 8 is inserted into the first countersink 11, and the second convex part 12 is inserted into the second countersink 13. Since the diameters of the first countersink 11 and the second countersink 13 gradually decrease from the opening side to the bottom, it is not only convenient for the first convex part 8 and the second convex part 12 to be inserted, but also the inner wall of the countersink presses the convex part more tightly as the insertion increases. In this embodiment, the first convex part 8, the sealing ring 5 and the second convex part 12 are integrally injection molded, so that the structure is simpler.

[0033] The sealing structure of the electric switch provided by the utility model, when assembling, the slit 6 of the convex part is pulled open, so that the clamping shaft 4 of the movable part 2 is clamped into the inner hole 7 of the sealing ring 5, and then the assembly formed by the movable part 2 and the sealing part 3 is installed into the switch body 1, and the convex part of the sealing part 3 is inserted into the countersunk hole of the switch body 1. Due to the limitation of the countersunk hole, the slit 6 will not open, so that the sealing ring 5 always wraps the clamping shaft 4. Compared with the prior art, the sealing part 3 will not be deformed or displaced during the assembly process, thereby ensuring the sealing reliability, and the sealing part assembly is more convenient, thereby improving the assembly efficiency.

[0034] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A sealing structure of an electric switch, characterized in that: The switch body (1) comprises a switch main body (1), a movable part (2) and a sealing part (3), wherein the movable part (2) is provided with a clamping shaft (4), the sealing part (3) comprises a sealing ring (5) sleeved on the clamping shaft (4), and at least one convex part provided on the outer wall of the sealing ring (5) and extending outward, the convex part is provided with a slit (6), one end of the slit (6) extends to the outer edge of the convex part, and the other end extends to the inner hole (7) of the sealing ring (5), and the switch main body (1) is provided with a countersunk hole adapted to the outer shape of the convex part.

2. The sealing structure of an electric switch according to claim 1, characterized in that: The sealing member (3) has a first protrusion (8), the first protrusion (8) is provided with the break (6), the switch body (1) comprises a cover plate (9) and a base (10) which are interlocked, and the base (10) is formed with a first countersunk hole (11) for the first protrusion (8) to be inserted.

3. The sealing structure of an electric switch according to claim 2, characterized in that: The sealing member (3) further comprises a second convex portion (12), wherein the second convex portion (12) and the first convex portion (8) are respectively arranged on two sides of the sealing ring (5), and the cover plate (9) is provided with a second countersunk hole (13) for inserting the second convex portion (12).

4. The sealing structure of an electric switch according to claim 2 or 3, characterized in that: The diameter of the first countersunk hole (11) gradually decreases from its opening side toward the bottom.

5. The sealing structure of an electric switch according to claim 3, characterized in that: The first convex portion (8), the sealing ring (5) and the second convex portion (12) are integrally formed by injection molding.

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