Steam switch

Abstract

The utility model discloses a steam switch which comprises a base, a wiring terminal installed on the base and an installation cavity used for installing a bimetallic strip. The wiring terminal comprises a first pin and a second pin; the first pin is provided with a guide hole and a moving contact sliding in the guide hole. The second pin is also provided with a static contact. The moving contact slides in the guide hole through the guide rod; an elastic piece and a clamping ring are further arranged above the guide hole, and the elastic piece is limited between the clamping ring and the first pin by connecting the clamping ring with the annular groove in the guide rod. In conclusion, when one end of the movable rod promotes the moving contact to be in contact with the static contact, conduction of the circuit is completed, and when the bimetallic strip in the mounting cavity is heated and deformed, the elastic piece promotes the guide rod to move upwards, so that the moving contact is separated from the static contact, and cutting of the circuit is completed. On the basis, the equipment utilizes the elastic sheet to enable the moving contact to be separated from the static contact, so that the sensitivity of the equipment during power failure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric appliance switch technical field, concretely is a steam switch. BACKGROUND

[0002] Through the retrieval discovery announcement number for: CN203491191U prior art, its working principle is: when the front half part of movable rod is lifted, the movable spring piece makes the movable contact and fixed contact contact, the conductive assembly is connected, makes the electric kettle enter heating working condition. When the water is boiled, the bimetallic strip feels that the outside temperature reaches critical value and will change, the tongue end in the middle of bimetallic strip is actively lifted up, pushes the convex rod of movable rod, and the rear half part of movable rod is lifted. The spring steel wire is used to make the rear half part of movable rod keep the state of being lifted. At this time, the convex part in the front half part of movable rod is pressed down, and the movable spring piece is pushed, so that the movable contact and fixed contact are separated, so that the conductive assembly is in the disconnected state, and the heating circuit stops working. When it is necessary to re-enter the heating state, only need to exert external force on the rear half part of movable rod, so that the movable contact and fixed contact on the conductive assembly are re-contacted and powered on.

[0003] Although it can complete the on-off of the circuit, but completely relies on the movable spring piece to make the movable contact and fixed contact separate, since the movable spring piece is too close to the movable contact and is easily affected by heat, so when the movable spring piece is heated, it is easy to cause its insufficient elasticity, thereby affecting the sensitivity of the equipment. UTILITY MODEL CONTENTS

[0004] The utility model discloses a steam switch to solve the problems in the prior art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a steam switch, including base, the wiring terminal of installing on the base and the installation cavity for installing bimetallic strip, the wiring terminal includes first pin and second pin, the first pin is equipped with the guide hole and the movable contact that slides in the guide hole, and the second pin is equipped with fixed contact still, the movable contact includes contact and the guide rod that sets up on the contact, and the guide rod slides in the guide hole, the upper side of the guide hole is equipped with the spring piece still, and the movable contact and the fixed contact are separated through the spring piece.

[0006] As the preferred technical scheme of the utility model: the side of the spring piece away from the first pin is equipped with the snap ring still, and the snap ring is connected with the ring groove on the guide rod to limit the spring piece between the opposite sides of the snap ring and the first pin.

[0007] As the preferred technical scheme of the utility model: the both sides of the installation cavity are equipped with the clamping slot and the limiting slot still, and the bimetallic strip is guided into the clamping slot and the limiting slot through the guide plate.

[0008] As a preferred technical scheme of the utility model: one side of the guide plate facing the bimetallic strip is further provided with an inclined plane and a supporting surface.

[0009] As a preferred technical scheme of the utility model: the number of the guide plates is two, and the two guide plates are symmetrically arranged in the mounting cavity.

[0010] As a preferred technical scheme of the utility model: a protruding part is further arranged between the two guide plates.

[0011] The utility model discloses the beneficial effects are as follows: when the one end of the movable rod promotes the movable contact and static contact to contact, the circuit is completed, when the bimetallic strip in the mounting cavity is deformed after being heated, the spring promotes the guide rod to move upwards, so that the movable contact and static contact are separated, and the circuit is cut off, especially, the distance between the movable contact and spring is far, the spring is little influenced by heat, and the elastic ability is not influenced. Based on this, the equipment utilizes the spring to promote the movable contact and static contact to separate, so as to improve the sensitivity of the equipment when being powered off. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the main body structure schematic drawing of the utility model;

[0013] Figure 2 It is the side structure schematic drawing of the base of the utility model;

[0014] Figure 3 It is the exploded structure schematic drawing of the terminal of the utility model;

[0015] Figure 4 It is the main body structure schematic drawing of the movable contact of the utility model.

[0016] In the drawing: 1, base;2, terminal;20, first pin;21, snap ring;22, spring;23, guide hole;24, static contact;25, movable contact;26, second pin;27, contact point;28, guide rod;29, annular groove;3, inclined plane;4, supporting surface;5, guide plate;6, mounting cavity;7, clamping groove;8, limiting groove;9, protruding part. DETAILED DESCRIPTION

[0017] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to be illustrative of the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "upper surface" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be construed as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0018] Referring to Figures 1-4 The present application provides an embodiment: a steam switch, comprising a base 1, a wiring terminal 2 mounted on the base 1 and a mounting cavity 6 for mounting a bimetallic strip; the wiring terminal 2 comprises a first pin 20 and a second pin 26; the first pin 20 is provided with a guide hole 23 and a movable contact 25 sliding in the guide hole 23, and the second pin 26 is further provided with a static contact 24; the movable contact 25 comprises a contact 27 and a guide rod 28 provided on the contact 27, and the guide rod 28 slides in the guide hole 23; the upper side of the guide hole 23 is further provided with a spring 22, and the spring 22 promotes the separation of the movable contact 25 and the static contact 24.

[0019] As described above, when one end of the movable rod promotes the contact of the movable contact 25 and the static contact 24 to complete the conduction of the circuit, when the movable rod and the movable contact 25 are separated, the spring 22 promotes the upward movement of the guide rod 28 to separate the movable contact 25 and the static contact 24 to complete the disconnection of the circuit, and in particular, the distance between the contact 27 and the spring 22 is far, the spring 22 is less affected by heat, and its elastic ability is not affected. Based on this, the device uses the spring 22 to promote the separation of the movable contact 25 and the static contact 24 to improve the sensitivity of the device when it is powered off.

[0020] Further, the side of the spring 22 away from the first pin is further provided with a snap ring 21, and the snap ring 21 is connected with the ring groove 29 provided on the guide rod 28 to limit the spring 22 between the opposite sides of the snap ring 21 and the first pin 20. Therefore, when the movable rod and the movable contact 25 are separated, the spring 22 can quickly promote the separation of the movable contact 25 and the static contact 24, ensuring the disconnection sensitivity of the device, and since the guide rod 28 passes through the guide hole 23 and then the spring 22 is sleeved outside the guide rod 28, and then the spring is limited between the opposite sides of the first pin and the snap ring by the snap ring, the installation and disassembly of the movable contact 25 are simple and convenient, and the assembly steps of the movable contact are simplified.

[0021] On the basis of the above scheme, since the two sides of the installation cavity 6 are also provided with the clamping groove 7 and the limiting groove 8, and the bimetallic strip is guided into the clamping groove 7 and the limiting groove 8 through the guide plate 5. Because of the setting of the guide plate 5, the bimetallic strip can be smoothly moved into the clamping groove 7 and the limiting groove 8 by the guide plate 5, and the rapid assembly of the bimetallic strip is realized.

[0022] Specifically, since the side of the guide plate 5 facing the bimetallic strip is also provided with the inclined surface 3 and the supporting surface 4, the bimetallic strip is attached to the inclined surface 3 when installed, and slides along the inclined surface 3 to the supporting surface 4, that is, the bimetallic strip can be smoothly installed in place, and the bimetallic strip can also be supported by the supporting surface 4.

[0023] Further, since the number of the guide plate 5 is two, and the two guide plates 5 are symmetrically arranged in the installation cavity 6, the bimetallic strip can be reliably supported while the two sides of the bimetallic strip are supported by the two guide plates 5 to avoid the phenomenon of deviation of the bimetallic strip during installation.

[0024] In addition, since the protruding part 9 is arranged between the two guide plates 5, when the end of the bimetallic strip away from the limiting groove 8 abuts against the protruding part 9, the stability of the bimetallic strip in the installation cavity 6 can be further ensured.

[0025] The embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and still fall within the protection scope of the utility model.

Claims

1. A steam switch, characterized by: The base (1), the terminal (2) and the installation cavity (6) for installing the bimetallic strip are included. The terminal (2) includes the first pin (20) and the second pin (26); the first pin (20) is provided with the guide hole (23) and the movable contact (25) sliding in the guide hole (23); and the second pin (26) is further provided with the static contact (24). The movable contact (25) includes the contact (27) and the guide rod (28) provided on the contact (27); and the guide rod (28) slides in the guide hole (23). The spring (22) is further provided above the guide hole (23); and the movable contact (25) is separated from the static contact (24) by the spring (22).

2. A steam switch according to claim 1, wherein: The clasp (21) is further provided on the side of the spring (22) away from the first pin; and the spring (22) is connected with the ring groove (29) provided on the guide rod (28) by the clasp (21) to limit the spring (22) between the opposite sides of the clasp (21) and the first pin (20).

3. A steam switch according to claim 1 or 2, characterised in that: The clamping groove (7) and the limiting groove (8) are further provided on both sides of the installation cavity (6); and the bimetallic strip is guided into the clamping groove (7) and the limiting groove (8) by the guide plate (5).

4. A steam switch according to claim 3, wherein: The inclined surface (3) and the supporting surface (4) are further provided on the side of the guide plate (5) facing the bimetallic strip.

5. A steam switch according to claim 4, wherein: The number of the guide plate (5) is two; and the guide plates (5) are symmetrically arranged in the installation cavity (6).

6. A steam switch according to claim 5, wherein: The protruding part (9) is further provided between the two guide plates (5).

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