Contact structure and electromagnetic relay

Abstract

The utility model discloses a contact structure and an electromagnetic relay, which comprises a contact part, an installation part used for being connected with a reed and a transition part connected between the contact part and the installation part, and the boundary dimension of the transition part is smaller than that of the contact part. The thickness design of the contact part is mainly used for meeting the consumption requirement of the whole life cycle of the contact structure, and the overall size of the transition part is configured to be smaller than that of the contact part, so that the overall size of the transition part is reduced, and the service life of the contact structure is prolonged on the premise of keeping normal connection strength. According to the contact structure, the material consumption of the contact structure can be effectively reduced, so that the service life performance of a contact product is not changed, and the purposes of reducing the material consumption of the contact structure and further reducing the production cost can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a contact structure and an electromagnetic relay. Background Art

[0002] Forced guided relays are completely different from conventional relays. They are specially designed for demanding tasks or safety-related applications. When they fail, they will not pose a risk to personnel safety or process safety. In addition, safety relays must be able to perform the necessary fail-safe actions certified by standard agencies (such as TUV / FM, etc.), and these fail-safe actions are designed according to specific principles and meet the requirements defined in international safety standards. Therefore, pure silver contacts are used in the contact selection, and pure silver contacts may have the problem of silver layer falling off during use. As shown in the attached Figure 5 As shown, the existing pure silver contact structure generally includes a contact cap 1' (equivalent to the contact part) and a rivet column 2' for riveting with the rivet hole of the spring. In actual use, the silver layer of the rear half of the contact cap 1' (i.e., the rear half away from the contact surface) is not consumed due to shedding, so the silver layer of this part is redundant and wasted, which is not conducive to reducing the production cost of the contact structure. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a contact structure, which mainly solves the technical problem that the silver layer in the rear half of the prior art silver contact structure is redundant and wasted, which makes it unfavorable to reduce the production cost of the contact structure.

[0004] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0005] A contact structure comprises a contact portion, a mounting portion for connecting with a spring sheet, and a transition portion connected between the contact portion and the mounting portion, wherein the outer dimensions of the transition portion are smaller than those of the contact portion.

[0006] Furthermore, a first step surface is formed at the intersection of the transition portion and the contact portion, and the first step surface is configured to prevent foreign matter adhering to the surface of the transition portion from being transferred to the contact action surface of the contact portion during the operation of the contact structure.

[0007] Furthermore, the first step surface is perpendicular to the axis of the transition portion, and the transition portion has a cylindrical structure.

[0008] Furthermore, the mounting portion is a riveted column structure adapted to be riveted to the riveting hole of the spring leaf, and the outer dimensions of the mounting portion are smaller than the outer dimensions of the transition portion.

[0009] Furthermore, a second step surface for riveting limit is formed at the intersection of the transition portion and the mounting portion.

[0010] Furthermore, the overall structure of the contact structure is a contact structure made of silver.

[0011] Furthermore, the contact structure is a moving contact structure of a relay, and the reed is a moving reed structure of a relay.

[0012] Furthermore, the contact portion, the transition portion and the mounting portion are coaxially arranged, and the contact portion, the transition portion and the mounting portion are an integrally formed structure.

[0013] Based on the same inventive concept, the utility model also provides an electromagnetic relay, comprising any of the contact structures described above.

[0014] Furthermore, the relay is a forced-guided relay.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In the contact structure and electromagnetic relay described in the utility model, the thickness design of the contact part is mainly used to meet the consumption requirements of the entire life cycle of the contact structure, and the overall volume of the transition part is reduced by configuring the outer dimensions of the transition part to be smaller than the outer dimensions of the contact part. Under the premise of maintaining normal connection strength, the material usage of the contact structure can be effectively reduced. In this way, the life performance of the contact product is guaranteed to remain unchanged, and the material usage of the contact structure can be reduced, thereby achieving the purpose of reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the contact structure of an embodiment of the utility model.

[0018] Figure 2 It is a side view of the contact structure of an embodiment of the utility model.

[0019] Figure 3 It is a schematic diagram of the assembly structure of the contact structure and the movable spring piece of the embodiment of the utility model.

[0020] Figure 4 It is a schematic diagram of the assembly structure of the contact structure and the movable spring piece at another angle according to an embodiment of the utility model.

[0021] Figure 5 It is a schematic diagram of the contact structure of the prior art.

[0022] Description of labels:

[0023] 1. Contact portion, 2. Transition portion, 3. Mounting portion, 4. First step surface, 5. Second step surface, 6. Spring leaf. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] Please refer to the attached Figure 1 To Attachment Figure 4 One embodiment of the utility model provides a contact structure, including a contact portion 1, a mounting portion 3 for connecting to a spring sheet 6, and a transition portion 2 connected between the contact portion 1 and the mounting portion 3, wherein the outer dimensions of the transition portion 2 are smaller than the outer dimensions of the contact portion 1. It can be understood that, in this embodiment, the thickness design of the contact portion 1 is mainly used to meet the consumption requirements of the entire life cycle of the contact structure, and by configuring the outer dimensions of the transition portion 2 to be smaller than the outer dimensions of the contact portion 1, the overall volume of the transition portion 2 is reduced, and the material usage of the contact structure can be effectively reduced while maintaining the normal connection strength. In this way, the life performance of the contact product is guaranteed to remain unchanged, and the material usage of the contact structure can be reduced, thereby achieving the purpose of reducing production costs.

[0027] Please refer to the attached Figure 1 To Attachment Figure 4 In one preferred embodiment, a first step surface 4 is formed at the intersection of the transition portion 2 and the contact portion 1, and the first step surface 4 is configured to prevent foreign matter adhering to the surface of the transition portion 2 from being transferred to the contact surface of the contact portion 1 during the operation of the contact structure. Figure 5As shown, the existing contact structure has a thicker cap 1', and in order to facilitate demoulding, a demoulding angle needs to be set at the periphery of the contact cap 1'. As a result, in some special usage scenarios, foreign matter is easily adhered to the entire periphery of the contact cap 1'. During the operation of the contact structure, there is a possibility that the foreign matter is transferred from the periphery of the contact cap 1' to the contact surface of the contact portion 1', thereby causing the defect of contact failure. The main reason why the prior art has not paid attention to this problem and improved it is that the problem of contact failure caused by the foreign matter adhered to the periphery of the contact cap 1' being transferred to the contact surface of the contact cap 1' during the operation of the contact is not obvious, and most of the existing relays have a demoulding angle. The sealing structure is set to place the internal structure of the relay in a relatively closed environment to reduce the problem of external water vapor erosion. Therefore, during the normal use of the relay product, the possibility of dust and foreign matter adhering to the outer peripheral surface of the contact cap 1' is extremely low, and the above-mentioned problem basically does not exist. However, in some special use environments, such as some special relay structures, the pushing part of the push card and the moving spring piece is relatively close to the contact structure. During the operation, the scraps generated by the pushing part are easy to splash onto the outer peripheral surface of the contact cap 1'. As the number of operations increases, the scraps and foreign matter adhered to the outer peripheral surface of the contact cap 1' may be transferred to the contact surface of the contact cap 1', thereby increasing the probability of contact failure and affecting the stability of the relay product. In this embodiment, compared with the attached Figure 5 The contact structure shown can effectively reduce the probability of foreign matter adhering to the outer peripheral surface of the transition portion 2 being transferred to the contact surface of the contact portion 1 during the contact action, thereby causing the contact structure to become blocked and fail, through the blocking of the first step surface 4, thereby effectively improving the use stability of the contact structure.

[0028] Please refer to the attached Figure 1 To Attachment Figure 4 In one preferred embodiment, preferably, the first step surface 4 is perpendicular to the axis of the transition portion 2, and the transition portion 2 is a cylindrical structure. However, those skilled in the art should understand that in other embodiments, the inner end of the first step surface 4 can also be inclined toward the contact surface of the contact portion 1, so that a groove structure is formed at the intersection of the transition portion 2 and the contact portion 1. The groove structure can also prevent foreign matter on the outer peripheral surface of the transition portion 2 from being transferred to the contact surface of the contact portion 1 during the operation of the contact structure.

[0029] Please refer to the attached Figure 1 To Attachment Figure 4In one preferred embodiment, the mounting portion 3 is a riveted column structure adapted to be riveted to the riveting hole of the spring leaf 6, and the outer dimensions of the mounting portion 3 are smaller than the outer dimensions of the transition portion 2. A second step surface 5 for riveting limit is formed at the intersection of the transition portion 2 and the mounting portion 3. In this embodiment, the second step surface 5 is used to abut against the surface of the riveting hole of the spring leaf 6 to form a riveting limit effect.

[0030] Please refer to the attached Figure 1 To Attachment Figure 4 In one preferred embodiment, the overall structure of the contact structure is a contact structure made of silver, preferably pure silver, the contact structure is a moving contact structure of a relay, and the reed 6 is a moving reed structure of a relay. However, those skilled in the art should understand that in other embodiments, from the perspective of reducing the production cost of the contact structure, the contact structure is not limited to being made of pure silver material as disclosed in this embodiment, and the moving contacts used in the existing ordinary relay field can all adopt this design to reduce the contact production cost.

[0031] Please refer to the attached Figure 1 To Attachment Figure 4 In one preferred embodiment, the contact portion 1, the transition portion 2 and the mounting portion 3 are coaxially arranged, and the contact portion 1, the transition portion 2 and the mounting portion 3 are an integrally formed structure.

[0032] Please refer to the attached Figure 1 To Attachment Figure 4 An embodiment of the utility model further provides an electromagnetic relay, comprising the contact structure of any of the above embodiments. In one preferred embodiment, the relay is a forced guide relay.

[0033] As described above, the embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model. Therefore, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the protection scope of the utility model.

Claims

1. A contact structure, characterized in that: It comprises a contact portion (1), a mounting portion (3) for connecting to a spring leaf (6), and a transition portion (2) connected between the contact portion (1) and the mounting portion (3), wherein the outer dimensions of the transition portion (2) are smaller than the outer dimensions of the contact portion (1).

2. The contact structure according to claim 1, characterized in that: A first step surface (4) is formed at the intersection of the transition portion (2) and the contact portion (1), and the first step surface (4) is configured to prevent foreign matter adhering to the surface of the transition portion (2) from being transferred to the contact action surface of the contact portion (1) during the operation of the contact structure.

3. The contact structure according to claim 2, characterized in that: The first step surface (4) is perpendicular to the axis of the transition portion (2), and the transition portion (2) is in a cylindrical structure.

4. The contact structure according to claim 1, characterized in that: The mounting portion (3) is in the form of a riveted column structure adapted to be riveted to the riveting hole of the leaf spring (6), and the outer dimensions of the mounting portion (3) are smaller than the outer dimensions of the transition portion (2).

5. The contact structure according to claim 4, characterized in that: A second step surface (5) for riveting limit is formed at the intersection of the transition portion (2) and the mounting portion (3).

6. The contact structure according to claim 1, characterized in that: The overall structure of the contact structure is a contact structure made of silver.

7. The contact structure according to claim 1, characterized in that: The contact structure is a moving contact structure of a relay, and the reed (6) is a moving reed structure of a relay.

8. The contact structure according to any one of claims 1 to 7, characterized in that: The contact portion (1), the transition portion (2) and the mounting portion (3) are coaxially arranged, and the contact portion (1), the transition portion (2) and the mounting portion (3) are an integrally formed structure.

9. An electromagnetic relay, characterized in that: The contact structure comprises the contact structure as claimed in any one of claims 1 to 8.

10. The electromagnetic relay according to claim 9, characterized in that: The relay is a force-guided relay.

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