Electromagnetic relay iron core guide sleeve

Abstract

The utility model provides an electromagnetic relay iron core guide sleeve which comprises a guide sleeve body, the guide sleeve body is arranged in a support of an electromagnetic relay in an injection molding mode, the guide sleeve body is used for a movable iron core to axially penetrate through and is in sliding fit with the movable iron core, and the outer circumferential wall of the movable iron core is attached to the inner circumferential wall of the guide sleeve body. A plurality of annular grooves which are distributed at intervals in the axial direction of the guide sleeve body are formed in the peripheral wall of the guide sleeve body, the annular grooves and the guide sleeve body are coaxially arranged, and after the guide sleeve body and the support are subjected to injection molding, the annular grooves are all fixedly embedded into the support; the guide sleeve can effectively avoid the situation that the guide sleeve body is axially separated from the support, and has the advantage that the fixing reliability of the guide sleeve body and the support is high.

Description

Technical Field

[0001] This utility model relates to the technical field of electromagnetic relay accessories, and more specifically, to an electromagnetic relay core guide sleeve. Background Technology

[0002] The guide sleeve is an accessory used to fix the electromagnetic relay to the bracket and to allow the moving iron core to reciprocate within it. In the existing electromagnetic relay structure, the guide sleeve is assembled with the bracket by injection molding, that is, the guide sleeve is injection molded on the inner side of the electromagnetic relay bracket. However, in the above structure, since the guide sleeve is only injection molded on the inner side of the bracket, there is no axial limiting structure between the guide sleeve and the bracket. Therefore, during the long-term reciprocating movement of the moving iron core relative to the guide sleeve, the guide sleeve is prone to axially detaching from the bracket, which means that the guide sleeve has the disadvantage of poor fixation reliability with the bracket. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an electromagnetic relay core guide sleeve, which can effectively prevent the guide sleeve body from axially separating from the bracket, that is, it has the advantage of high reliability of the guide sleeve body and the bracket.

[0004] This utility model provides an electromagnetic relay core guide sleeve, including a guide sleeve body, which is injection molded in the support of the electromagnetic relay. The guide sleeve body is used for the moving iron core to pass through axially and slide in cooperation with the moving iron core. The outer peripheral wall of the moving iron core is in contact with the inner peripheral wall of the guide sleeve body. The outer peripheral wall of the guide sleeve body is provided with a plurality of annular grooves that are spaced apart along the axial direction of the guide sleeve body. The annular grooves are coaxially arranged with the guide sleeve body. After the guide sleeve body and the support are injection molded, the plurality of annular grooves are all embedded in the support.

[0005] By adopting the above-mentioned structure, this utility model, under the action of several annular grooves, can be fixed with the bracket after the guide sleeve body and the bracket are injection molded, thereby achieving axial positioning of the guide sleeve body and the bracket. In this way, during the long-term reciprocating movement of the moving iron core relative to the guide sleeve body, the axial separation of the guide sleeve body from the bracket can be effectively avoided, thus having the advantage of high reliability of the guide sleeve body and the bracket.

[0006] In one possible implementation, the outer side wall of the guide sleeve body is provided with several limiting grooves in the circumferential direction. Each limiting groove extends along the axial direction of the guide sleeve body. The limiting grooves are interspersed with several annular grooves. After the guide sleeve body and the bracket are injection molded, the limiting grooves are embedded in the bracket. By adopting this structure, under the action of the limiting grooves, after the guide sleeve body is injection molded into the bracket of the electromagnetic relay, each limiting groove can be embedded in the bracket, thereby effectively preventing the guide sleeve body from rotating relative to the bracket, and further improving the embedding strength and reliability of the guide sleeve body and the bracket.

[0007] In one possible implementation, an annular chamfered surface is provided on the inner wall of the lower end of the guide sleeve body. The annular chamfered surface is used to cooperate with the outer wall of the moving iron core for guidance so that the moving iron core can pass through the guide sleeve body axially. By providing an annular chamfered surface on the inner wall of the lower end of the guide sleeve body, when the moving iron core and the guide sleeve body are assembled, the annular chamfered surface can cooperate with the outer wall of the moving iron core for guidance so that the moving iron core can pass through the guide sleeve body circumferentially, which can facilitate the insertion of the moving iron core and the guide sleeve body.

[0008] In one possible implementation, the inner peripheral wall of the guide sleeve body is coated with a wear-resistant coating. By coating the inner peripheral wall of the guide sleeve body with a wear-resistant coating, the wear of the guide sleeve body can be effectively avoided during the long-term axial reciprocating movement of the moving iron core relative to the guide sleeve body, thus ensuring the coaxiality of the guide sleeve body and the moving iron core. Attached Figure Description

[0009] Figure 1 This is the first three-dimensional structural schematic diagram of the present invention;

[0010] Figure 2 This is a second three-dimensional structural diagram of the present invention. Detailed Implementation

[0011] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0012] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0013] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0014] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] See Figure 1-2 As shown in the figure, this application discloses an electromagnetic relay core guide sleeve, including a guide sleeve body 1. The guide sleeve body 1 is injection molded in the support of the electromagnetic relay. The guide sleeve body 1 is used for the moving iron core to pass through axially and slide in cooperation with the moving iron core. The outer peripheral wall of the moving iron core is in contact with the inner peripheral wall of the guide sleeve body 1. A plurality of annular grooves 11 are provided on the outer peripheral wall of the guide sleeve body 1, which are spaced apart along the axial direction of the guide sleeve body 1. The annular grooves 11 are coaxially arranged with the guide sleeve body 1. After the guide sleeve body 1 and the support are injection molded, the plurality of annular grooves 11 are all embedded in the support.

[0016] The outer side wall of the guide sleeve body 1 is provided with several limiting grooves 12 in the circumferential direction. Each limiting groove 12 extends along the axial direction of the guide sleeve body 1. The limiting grooves 12 are interspersed with several annular grooves 11. After the guide sleeve body 1 and the bracket are injection molded, the limiting grooves 12 are embedded in the bracket. With this structure, under the action of the limiting grooves, after the guide sleeve body is injection molded into the bracket of the electromagnetic relay, each limiting groove can be embedded in the bracket, thereby effectively preventing the guide sleeve body from rotating relative to the bracket, and further improving the embedding strength and reliability of the guide sleeve body and the bracket.

[0017] An annular chamfered surface 13 is provided on the inner wall of the lower end of the guide sleeve body 1. The annular chamfered surface 13 is used to cooperate with the outer wall of the moving iron core for guidance so that the moving iron core can pass through the guide sleeve body 1 axially. After the annular chamfered surface is provided on the inner wall of the lower end of the guide sleeve body, when the moving iron core and the guide sleeve body are assembled, the annular chamfered surface can cooperate with the outer wall of the moving iron core for guidance so that the moving iron core can pass through the guide sleeve body circumferentially, which can facilitate the insertion of the moving iron core and the guide sleeve body.

[0018] The inner circumferential wall of the guide sleeve body 1 is coated with a wear-resistant coating. By coating the inner circumferential wall of the guide sleeve body with a wear-resistant coating, the wear of the guide sleeve body can be effectively avoided during the long-term axial reciprocating movement of the moving iron core relative to the guide sleeve body, thus ensuring the coaxiality of the guide sleeve body and the moving iron core.

[0019] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electromagnetic relay core guide sleeve, comprising a guide sleeve body (1), the guide sleeve body (1) being injection molded in the support of the electromagnetic relay, the guide sleeve body (1) being used for axial passage of a moving iron core and slidingly engaging with the moving iron core, the outer peripheral wall of the moving iron core being in contact with the inner peripheral wall of the guide sleeve body (1); characterized in that: The outer peripheral wall of the guide sleeve body (1) is provided with a number of annular grooves (11) spaced apart along the axial direction of the guide sleeve body (1). The annular grooves (11) are coaxially arranged with the guide sleeve body (1). After the guide sleeve body (1) and the bracket are injection molded, the number of annular grooves (11) are all embedded in the bracket.

2. The electromagnetic relay core guide sleeve according to claim 1, characterized in that: The outer side wall of the guide sleeve body (1) is provided with several limiting grooves (12) in the circumferential direction. Each limiting groove (12) extends along the axial direction of the guide sleeve body (1). The limiting grooves (12) and the annular grooves (11) are intersected. After the guide sleeve body (1) and the bracket are injection molded, the limiting grooves (12) are embedded in the bracket.

3. The electromagnetic relay core guide sleeve according to claim 1 or 2, characterized in that: An annular chamfered surface (13) is provided on the inner wall of the lower end of the guide sleeve body (1). The annular chamfered surface (13) is used to cooperate with the outer wall of the moving iron core for guidance so that the moving iron core can pass through the guide sleeve body (1) axially.

4. The electromagnetic relay core guide sleeve according to claim 3, characterized in that: The inner circumferential wall of the guide sleeve body (1) is coated with a wear-resistant coating.

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