阅读说明：本技术 一种静触头及熔断器式隔离开关 (Static contact and fuse type isolating switch ) 是由 翟连钢 罗池福 胡荣华 包志舟 谷冠鹏 朱志荣 黄悠斐 薛佩微 张程豪 许建余 于 2021-08-06 设计创作，主要内容包括：本发明提供一种静触头及熔断器式隔离开关,其中,静触头包括静触头主体,以及分别与静触头主体相连的两个静触板,两个静触板相对形成供动触头插入的插槽,静触板具有分设于其高度方向两端的第一触板部和第二触板部,还包括：弹性结构,适于分别与第一触板部和第二触板部弹性相抵,以使第一触板部和第二触板部均与动触头压紧连接。由于位于静触板上下端的第一触板部和第二触板部均能在弹性结构的弹性作用力下,与动触头夹紧,与现有技术的卡簧仅对第一静触板上部进行夹紧的方式相比,使得静触头与动触头之间为“面接触”,增加了两者之间的接触面积,使得接触电阻较小,降低了温升,提高了产品的可靠性。(The invention provides a static contact and a fuse type isolating switch, wherein the static contact comprises a static contact main body and two static contact plates which are respectively connected with the static contact main body, the two static contact plates oppositely form an insertion slot for a moving contact to insert, the static contact plates are provided with a first contact plate part and a second contact plate part which are respectively arranged at two ends of the static contact plates in the height direction, and the fuse type isolating switch also comprises: and the elastic structure is suitable for being elastically abutted against the first contact plate part and the second contact plate part respectively so as to enable the first contact plate part and the second contact plate part to be tightly pressed and connected with the moving contact. Because the first contact plate part and the second contact plate part which are positioned at the upper end and the lower end of the static contact plate can be clamped with the moving contact under the elastic acting force of the elastic structure, compared with the mode that the clamping spring in the prior art only clamps the upper part of the first static contact plate, the static contact and the moving contact are in surface contact, the contact area between the static contact and the moving contact is increased, the contact resistance is smaller, the temperature rise is reduced, and the reliability of a product is improved.)

1. The utility model provides a static contact, including static contact main part (1), and respectively with two static touch panel (2) that static contact main part (1) links to each other, two static touch panel (2) relatively form and supply moving contact male slot (20), static touch panel (2) have divide first touch board portion (21) and second touch board portion (22) of locating its direction of height both ends, its characterized in that still includes:

and the elastic structure is suitable for being elastically abutted against the first contact plate part (21) and the second contact plate part (22) respectively, so that the first contact plate part (21) and the second contact plate part (22) are in compression connection with the moving contact.

2. The static contact according to claim 1, wherein the static contact body (1) comprises a bottom plate (3) and first connecting plates (4) respectively disposed at two sides of the bottom plate (3) and extending upward, and the elastic structure comprises a second connecting plate (5) connecting the first connecting plate (4) and the second contact plate (22) and applying an elastic force to the second contact plate (22).

3. The static contact according to claim 2, wherein the second connecting plate (5) is wave-shaped.

4. The static contact according to claim 2 or 3, wherein the bottom plate (3), the first connecting plate (4), the second connecting plate (5) and the static contact plate (2) are formed by bending integrally.

5. The stationary contact according to any one of claims 1 to 4, wherein the resilient structure further comprises a snap spring (6) mounted on the stationary contact, the snap spring (6) having a first resilient arm (61) resiliently abutting against the first contact plate portion (21) of the stationary contact plate (2).

6. The stationary contact according to claim 5, wherein the snap spring (6) further has a second resilient arm (62) resiliently abutting against the second contact plate portion (22).

7. The static contact according to claim 6, wherein the first elastic arm (61) and the second elastic arm (62) are connected to form an arc-shaped elastic arm, the snap spring (6) comprises an arc-shaped snap spring main body (60) and two elastic arms respectively arranged at two ends of a gap of the snap spring main body (60), and the middle of each elastic arm is connected with the snap spring main body (60).

8. The static contact according to claim 6, wherein the static contact plate (2) is provided with a groove (23) abutting against the end of the first elastic arm (61) and the end of the second elastic arm (62), respectively.

9. The static contact according to claim 6, wherein the contact surfaces of the first elastic arm (61) and the second elastic arm (62) and the static contact plate (2) are both cambered surfaces.

10. A fused disconnector comprising a stationary contact according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of low-voltage electric appliances, in particular to a static contact and a fuse type isolating switch.

Background

Fused disconnectors are important switching devices in low-voltage distribution electrical systems. When the electric appliance and the device are overhauled and turned off, the fuse type isolating switch has an obvious disconnection point and plays a role in isolating voltage and emergently disconnecting.

The existing fixed contact of the fuse type disconnecting switch is shown in fig. 8 and comprises a bottom plate 03, a first fixed contact plate 01 and a second fixed contact plate 02 which extend upwards from two sides of the bottom plate 03 respectively, wherein the first fixed contact plate 01 and the second fixed contact plate 02 relatively form an insertion slot 05 for inserting a moving contact 04, and a clamp spring 06 suitable for clamping the first fixed contact plate 01 and the second fixed contact plate 02 is arranged on the fixed contact. The inventor finds that in actual work, as the clamp spring 06 only clamps the upper part 07 of the first stationary contact plate 01 and the second stationary contact plate 02 and does not clamp the lower part 08, the cross section of the slot 05 can be in a shape of a Chinese character 'ba', that is, the upper part caliber of the slot 05 is small, and the lower part caliber is large, so that when the moving contact 04 is inserted into the slot 05 of the stationary contact, only the upper part 07 of the first stationary contact plate 01 and the second stationary contact plate 02 is in contact with the moving contact 04, and a gap (which is not firmly clamped with the moving contact) is formed between the lower part 08 and the moving contact 04, that is, the stationary contact and the moving contact are in line contact instead of in surface contact, and as the contact area between the moving contact and the stationary contact is small, the contact resistance is large, the temperature is increased, and the reliability of a product is reduced.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects of large contact resistance and high temperature rise caused by small contact area of the moving contact and the fixed contact of the isolating switch in the prior art, so that the fixed contact with large contact area and low temperature rise and the fuse type isolating switch with the fixed contact are provided.

Therefore, the present invention provides a static contact, including a static contact main body, and two static contact plates respectively connected to the static contact main body, where the two static contact plates are opposite to each other to form an insertion slot for a moving contact to be inserted into, and the static contact plate has a first contact plate portion and a second contact plate portion respectively disposed at two ends of the static contact plate in a height direction, and further includes: and the elastic structure is suitable for elastically propping against the first contact plate part and the second contact plate part respectively so as to enable the first contact plate part and the second contact plate part to be in compression connection with the moving contact.

The static contact main body comprises a bottom plate and first connecting plates which are arranged on two sides of the bottom plate respectively and extend upwards, and the elastic structure comprises a second connecting plate which is connected with the first connecting plate and the second touch plate part and can apply elastic acting force to the second touch plate part.

The second connecting plate is wavy.

The bottom plate, the first connecting plate, the second connecting plate and the static contact plate are integrally bent and formed.

The first connecting plate is formed with a first through hole extending along the height direction of the first connecting plate, and the bottom plate is formed with a second through hole extending along the length direction of the bottom plate and communicated with the first through hole.

The elastic structure further comprises a clamp spring arranged on the static contact, and the clamp spring is provided with a first elastic arm elastically abutted against the first touch plate part of the static touch plate and a second elastic arm elastically abutted against the second touch plate part.

The first elastic arm and the second elastic arm are connected into an arc-shaped elastic arm, the clamp spring comprises an arc-shaped clamp spring main body and two elastic arms which are respectively arranged at two ends of a gap of the clamp spring main body, and the middle parts of the elastic arms are connected with the clamp spring main body.

And grooves which are abutted against the end parts of the first elastic arm and the second elastic arm are respectively arranged on the static contact plate.

The contact surfaces of the first elastic arm and the second elastic arm with the static contact plate are cambered surfaces.

The invention provides a fuse type isolating switch which comprises the static contact.

The technical scheme of the invention has the following advantages:

1. according to the static contact provided by the invention, the elastic structure can be elastically abutted against the first contact plate part and the second contact plate part at the upper end and the lower end of the static contact respectively, so that the first contact plate part and the second contact plate part are both tightly connected with the moving contact.

2. The elastic structure of the static contact provided by the invention comprises the second connecting plate which is connected with the first connecting plate and the second contact plate part and can apply elastic acting force to the second contact plate part, so that the second connecting plate not only plays a role of connecting the first connecting plate and the contact plate, but also plays a role of applying elastic acting force which enables the second contact plate part to be tightly connected with the moving contact when the moving contact is inserted into the slot, and the second connecting plate has the advantage of simple structure; furthermore, the wavy second connecting plate has the advantage of large elastic effect.

3. The static contact provided by the invention has the advantages of simple structure and convenience in subsequent assembly because the bottom plate, the first connecting plate, the second connecting plate and the static contact plate are integrally bent and formed.

4. According to the static contact provided by the invention, the clamp spring is provided with the first elastic arm which is elastically abutted against the first contact plate part of the static contact plate and the second elastic arm which is elastically abutted against the second contact plate part, and the first contact plate part and the second contact plate part are both in compression connection with the moving contact through the arrangement of the first elastic arm and the second elastic arm, so that the contact area between the moving contact and the static contact is increased, the contact resistance is smaller, the temperature rise is reduced, and the reliability of a product is improved; in addition, the clamp spring has the advantages of simple structure and convenience in assembly.

5. According to the static contact provided by the invention, the first elastic arm and the second elastic arm are connected into the arc-shaped elastic arm, the clamp spring comprises the arc-shaped clamp spring main body and the two elastic arms which are respectively arranged at the two ends of the notch of the clamp spring main body, and the middle part of the elastic arm is connected with the clamp spring main body, so that the first elastic arm and the second elastic arm apply elastic acting forces with the same size to the corresponding first touch plate part and the corresponding second touch plate part, and further, the upper caliber and the lower caliber of the slot are ensured to be consistent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a perspective view of a first embodiment of a stationary contact according to the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a schematic structural view of FIG. 2 with the clamp spring removed;

fig. 4 is a perspective view of a second embodiment of a stationary contact according to the present invention;

fig. 5 is a schematic structural diagram of a snap spring in the second and third embodiments of the static contact;

fig. 6 is a perspective view of a third embodiment of a stationary contact according to the present invention;

FIG. 7 is a front view of FIG. 6;

fig. 8 is a schematic structural diagram of a fixed contact of a fuse type disconnecting switch in the prior art.

Description of reference numerals: 01. a first stationary contact plate; 02. a second stationary contact plate; 03. a base plate; 04. a moving contact; 05. a slot; 06. a clamp spring; 07. an upper portion; 08. a lower portion;

1. a static contact main body; 2. a stationary contact plate; 20. a slot; 21. a first touch panel portion; 22. a second touch panel portion; 23. a groove; 3. a base plate; 31. a second through hole; 4. a first connecting plate; 41. a first through hole; 5. a second connecting plate; 6. a clamp spring; 60. a clamp spring main body; 61. a first resilient arm; 62. a second resilient arm.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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

Example 1

The present embodiment provides a fuse type disconnecting switch, which includes a switch body and a static contact disposed on the switch body, as shown in fig. 1 to 3, the static contact includes a static contact main body 1, two static contact plates 2 and an elastic structure.

As shown in fig. 1 and 2, the static contact body 1 includes a bottom plate 3 and first connecting plates 4 respectively disposed on two sides of the bottom plate 3 and extending upward. The first connecting plate 4 is formed with a first through hole 41 extending along the height direction thereof, the bottom plate 3 is formed with a second through hole 31 extending along the length direction thereof and communicating with the first through hole 41, and the first through hole 41 and the second through hole 31 are used for heat dissipation.

The number of the static contact plates 2 is two, two of the static contact plates 2 are opposite to form a slot 20 for inserting the moving contact, and the static contact plate 2 is provided with a first contact plate part 21 and a second contact plate part 22 which are respectively arranged at two ends of the static contact plate in the height direction.

And the elastic structure is suitable for being elastically abutted against the first contact plate part 21 and the second contact plate part 22 respectively so as to enable the first contact plate part 21 and the second contact plate part 22 to be in compression connection with the movable contact, and the elastic structure comprises a second connecting plate 5 and a clamp spring 6.

And a second connecting plate 5 connecting the first connecting plate 4 and the second touch plate 22 and capable of applying an elastic force to the second touch plate 22. In this embodiment, as shown in fig. 3, the second connecting plate 5 is wavy, and the bottom plate 3, the first connecting plate 4, the second connecting plate 5 and the stationary contact plate 2 are integrally formed by bending.

As an alternative embodiment, the second connecting plate 5 is U-shaped.

And the clamp spring 6 is arranged on the static contact head and is provided with a first elastic arm 61 which is elastically abutted against the first contact plate part 21 of the static contact plate 2.

Example 2

The present embodiment provides a fuse type disconnecting switch, which includes a switch body and a static contact disposed on the switch body, as shown in fig. 4, the static contact includes a static contact main body 1, two static contact plates 2 and an elastic structure.

The static contact body 1 comprises a bottom plate 3 and first connecting plates 4 which are respectively arranged on two sides of the bottom plate 3 and extend upwards, and the first connecting plates 4 are connected with the static contact plate 2 through second connecting plates 5.

The number of the static contact plates 2 is two, two of the static contact plates 2 are opposite to form a slot 20 for inserting the moving contact, and the static contact plate 2 is provided with a first contact plate part 21 and a second contact plate part 22 which are respectively arranged at two ends of the static contact plate in the height direction. The static contact plate 2 is respectively provided with a groove 23 which is abutted against the end part of the first elastic arm 61 and the end part of the second elastic arm 62, and the groove 23 is used for limiting the position of the end part of the elastic arm.

And an elastic structure adapted to elastically abut against the first contact plate portion 21 and the second contact plate portion 22, respectively, so that both the first contact plate portion 21 and the second contact plate portion 22 are in compression connection with the movable contact, in this embodiment, the elastic structure is a snap spring 6.

The latch spring 6, as shown in fig. 5, has a first elastic arm 61 elastically abutting against the first contact plate portion 21 of the stationary contact plate 2, and a second elastic arm 62 elastically abutting against the second contact plate portion 22. The first elastic arm 61 and the second elastic arm 62 are connected to form an arc-shaped elastic arm, the clamp spring 6 comprises an arc-shaped clamp spring main body 60 and two elastic arms which are respectively arranged at two ends of a gap of the clamp spring main body 60, and the middle parts of the elastic arms are connected with the clamp spring main body 60. The contact surfaces of the first elastic arm 61 and the second elastic arm 62 and the static contact plate 2 are both arc surfaces.

Example 3

The present embodiment provides a fuse type disconnecting switch, which includes a switch body and a static contact disposed on the switch body, as shown in fig. 6 and 7, the static contact includes a static contact main body 1, two static contact plates 2 and an elastic structure.

The static contact main body 1 comprises a bottom plate 3 and first connecting plates 4 which are respectively arranged on two sides of the bottom plate 3 and extend upwards. The first connecting plate 4 is formed with a first through hole 41 extending along the height direction thereof, the bottom plate 3 is formed with a second through hole 31 extending along the length direction thereof and communicating with the first through hole 41, and the first through hole 41 and the second through hole 31 are used for heat dissipation.

The number of the static contact plates 2 is two, two of the static contact plates 2 are opposite to form a slot 20 for inserting the moving contact, and the static contact plate 2 is provided with a first contact plate part 21 and a second contact plate part 22 which are respectively arranged at two ends of the static contact plate in the height direction. The stationary contact plate 2 is provided with grooves 23 which are abutted against the end portions of the first elastic arm 61 and the second elastic arm 62.

And the elastic structure is suitable for being elastically abutted against the first contact plate part 21 and the second contact plate part 22 respectively so as to enable the first contact plate part 21 and the second contact plate part 22 to be in compression connection with the movable contact, and the elastic structure comprises a second connecting plate 5 and a clamp spring 6.

And a second connecting plate 5 connecting the first connecting plate 4 and the second touch plate 22 and capable of applying an elastic force to the second touch plate 22. In this embodiment, the second connecting plate 5 is wavy, and the bottom plate 3, the first connecting plate 4, the second connecting plate 5 and the stationary contact plate 2 are integrally formed by bending.

As an alternative embodiment, the second connecting plate 5 is U-shaped.

The latch spring 6 is mounted on the stationary contact, and as shown in fig. 5, has a first elastic arm 61 elastically abutting against the first contact plate portion 21 of the stationary contact plate 2, and a second elastic arm 62 elastically abutting against the second contact plate portion 22. The first elastic arm 61 and the second elastic arm 62 are connected to form an arc-shaped elastic arm, the clamp spring 6 comprises an arc-shaped clamp spring main body 60 and two elastic arms which are respectively arranged at two ends of a gap of the clamp spring main body 60, and the middle parts of the elastic arms are connected with the clamp spring main body 60. The contact surfaces of the first elastic arm 61 and the second elastic arm 62 with the static contact plate 2 are both arc surfaces, so that the friction with the static contact plate 2 is reduced, and the service life of the static contact is prolonged.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.