Lock catch type temperature controller

Abstract

The utility model provides a lock catch type temperature controller, which comprises a shell with an opening at one end, an insulating base, a bottom plate, a bimetallic strip, a first pin and a second pin, and is characterized in that the bottom plate is fixed on the insulating base and is provided with a static contact, the bimetallic strip is provided with a movable contact matched with the static contact, and the insulating base, the bottom plate and the bimetallic strip are all positioned in the shell; one end of the first pin passes through the insulating base and is connected with the bottom plate, and one end of the second pin passes through the insulating base and is connected with the bimetallic strip; the plug further comprises a plugging block, a barb is arranged on the plugging block, a clamping hole is formed in the position, close to the opening, of the shell, the barb is clamped into the clamping hole to fix the plugging block to the opening of the shell, the plugging block abuts against the insulating base, and the other end of the first pin and the other end of the second pin both extend out of the plugging block. Glue pouring operation is not needed when the temperature controller is assembled, and the situation that the body health of workers is damaged due to the fact that gas harmful to the human body is generated due to volatilization of molten glue in the assembling process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature control devices, in particular to a lock-type temperature controller. Background Art

[0002] Thermal protectors are commonly used electrical components, among which small and micro thermal protectors are becoming more and more popular. The application number is: 201820656283.9, and the utility model name is: A circuit board temperature controller. The public document discloses a micro thermal protector, which seals the bimetallic strip and the base in the shell with glue during assembly, and then pours the molten colloid into the opening end of the shell, and waits for the colloid to cool and solidify;

[0003] In this assembly method, the molten colloid will evaporate during the assembly process to produce harmful gases to the human body, which will damage the health of workers to a certain extent. In addition, if the base and the shell are not in close contact, the colloid will penetrate into the shell and easily block or even interrupt the contact between the static contact and the moving contact, causing the product to be scrapped. Utility Model Content

[0004] The purpose of the utility model is to provide a locking type thermostat to solve the above-mentioned technical problems.

[0005] The technical solution of the present application is: a lock-type temperature controller, comprising a shell with an opening at one end, an insulating base, a bottom plate, a bimetallic strip, a first pin and a second pin, the bottom plate being fixed on the insulating base and provided with a static contact, the bimetallic strip being provided with a moving contact cooperating with the static contact, the insulating base, the bottom plate and the bimetallic strip being all located in the shell; one end of the first pin passes through the insulating base and is connected to the bottom plate, and one end of the second pin passes through the insulating base and is connected to the bimetallic strip; it also includes a blocking block, the blocking block is provided with a barb, a clamping hole is provided at a position of the shell near the opening, the barb is clamped into the clamping hole to fix the blocking block at the opening of the shell, so that the blocking block is against the insulating base, and the other end of the first pin and the other end of the second pin both extend out of the blocking block.

[0006] Preferably, the shell is an insulating shell, and the insulating base is also fixed with a connecting piece, one end of the connecting piece is connected to the insulating base, and the other end is connected to the bimetallic strip, the end of the connecting piece connected to the bimetallic strip is against the side of the shell away from the opening, and the second pin is connected to the connecting piece.

[0007] Preferably, the connecting piece is a spring piece.

[0008] Preferably, one end of the connecting piece away from the insulating base is provided with a U-shaped bend, and one end of the bimetallic strip away from the insulating base is clamped in the U-shaped bend.

[0009] Preferably, an abutment portion is provided at one end of the U-shaped bend that is not connected to the bimetallic strip, and the abutment portion abuts against the bimetallic strip.

[0010] Preferably, the blocking block and the insulating base are provided separately.

[0011] Preferably, the second pin is integrally provided with the connecting piece.

[0012] Preferably, the first pin is integrally arranged with the base plate.

[0013] Preferably, the blocking block is integrally provided with the insulating base.

[0014] Preferably, the card hole is replaced by a card slot.

[0015] When assembling the lock-type temperature controller provided by the utility model, the integrated structure formed by the insulating base, the bottom plate and the bimetallic strip is inserted into the shell, and then the blocking block is inserted along the opening of the shell to hold the insulating base against the back hook and snap into the snap hole. The structure does not require glue pouring operation during assembly, and during the assembly process, no harmful gas to the human body will be generated due to the volatilization of molten colloid, which will cause damage to the health of workers, and no colloid will penetrate into the shell to block or even interrupt the contact between the static contact and the moving contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the internal structure of a lock-type thermostat provided by the utility model;

[0017] Figure 2 yes Figure 1 AA section view;

[0018] Figure 3 yes Figure 1 One of the exploded diagrams;

[0019] Figure 4 yes Figure 1 Explosion diagram 2;

[0020] In the figure: housing 1, card hole 1-1, insulating base 2, bottom plate 3, bimetallic strip 4, first pin 5, second pin 6, static contact 7, moving contact 8, blocking block 9, barb 9-1, connecting piece 10, U-shaped bend 10-1, abutment portion 10-2. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Embodiment, the utility model provides a lock type thermostat, see Figure 1-Figure 4, including a shell 1 with an opening at one end, an insulating base 2, a bottom plate 3, a bimetallic strip 4, a first pin 5, a second pin 6 and a blocking block 9, the bottom plate is fixed on the insulating base and is provided with a static contact 7, the bimetallic strip is provided with a moving contact 8 cooperating with the static contact, the insulating base, the bottom plate and the bimetallic strip 4 are all located in the shell; one end of the first pin passes through the insulating base and is connected to the bottom plate, and one end of the second pin passes through the insulating base and is connected to the bimetallic strip. It should be noted that the connection between the second pin and the bimetallic strip here can be direct or indirect, and no specific limitation is made here; a barb 9-1 is provided on the blocking block, and a card hole 1-1 is provided near the opening of the shell, the barb is inserted into the card hole to fix the blocking block at the opening of the shell, so that the blocking block is against the insulating base, and the other end of the first pin and the other end of the second pin both extend out of the blocking block.

[0023] When assembling the above-mentioned lock-type thermostat, the integrated structure formed by the insulating base, the bottom plate and the bimetallic strip is inserted into the shell, and then the blocking block is inserted along the opening of the shell to support the insulating base and then the barb is inserted into the card hole. This structure does not require glue filling operation during assembly. During the assembly process, no harmful gases to the human body will be generated due to the volatilization of molten colloid, which will cause damage to the health of workers, and no colloid will penetrate into the shell to block or even interrupt the contact between the static contact and the moving contact.

[0024] In the above embodiment, the clamping hole can be replaced by a clamping slot. By using the clamping slot instead of the clamping hole, the sealing performance of the housing is better. However, during assembly, the worker needs to judge by feeling whether the barb is inserted into the clamping slot.

[0025] As a preferred embodiment, the shell is an insulating shell, and the insulating base is also fixed with a connecting piece 10, one end of the connecting piece is connected to the insulating base, and the other end is connected to the bimetallic strip, the end of the connecting piece connected to the bimetallic strip is against the side of the shell away from the opening, and the second pin is connected to the connecting piece. In this embodiment, the connecting piece is a spring piece. When the structure is assembled, when the blocking block is against the insulating base and then pushed forward, the connecting piece is deformed to generate prestress until the barb is aligned with the card hole and then snapped into the card hole, so that the blocking block is restricted by the connecting piece forward and by the barb and the card hole backward, and is firmly fixed at the opening position of the shell, and the integrated structure formed by the insulating base, the bottom plate, the bimetallic strip and the connecting piece is also firmly restricted by the insulating base and the shell, and the whole is not easy to loosen.

[0026] In one embodiment, a U-shaped bend 10-1 is provided at one end of the connecting piece away from the insulating base, and the end of the bimetallic strip away from the insulating base is stuck in the U-shaped bend. Of course, the bimetallic strip can also be fixed to the connecting piece by welding, riveting or threaded connection to increase the firmness of the fixation; an abutment portion 10-2 is provided at the end of the U-shaped bend that is not connected to the bimetallic strip, and the abutment portion abuts against the bimetallic strip, so that the U-shaped bend of the connecting piece abuts against the side of the corresponding opening of the outer shell, and the abutment portion abuts against the bimetallic strip at the top, so that the connecting piece is firmly stuck in the outer shell when subjected to reaction forces in different directions, thereby effectively sticking the integrated structure formed by the insulating base, the bottom plate, the bimetallic strip and the connecting piece in the outer shell, and the whole will not loosen.

[0027] As an implementation mode, the blocking block and the insulating base are separately provided. During manufacturing, holes for the pins to pass through are provided on the blocking block so as to lead out the pins.

[0028] As an implementation mode, the second pin and the connecting piece may be integrally provided; and the first pin and the bottom plate may be integrally provided.

[0029] As an implementation mode, the blocking block is integrally provided with the insulating base.

[0030] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. The words "first" and "second" are only used to distinguish the names and are not intended to limit the technical terms. For those skilled in the art, the utility model can be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lock-type temperature controller, comprising a housing (1) with an opening at one end, an insulating base (2), a bottom plate (3), a bimetallic strip (4), a first pin (5) and a second pin (6), wherein the bottom plate is fixed on the insulating base and is provided with a static contact (7), the bimetallic strip is provided with a movable contact (8) cooperating with the static contact, and the insulating base, the bottom plate and the bimetallic strip are all located in the housing; One end of the first pin passes through the insulating base and is connected to the bottom plate, and one end of the second pin passes through the insulating base and is connected to the bimetallic strip; characterized in that: It also comprises a blocking block (9), the blocking block being provided with a barb (9-1), the housing being provided with a latching hole (1-1) at a position close to the opening, the barb being latched into the latching hole to fix the blocking block at the opening of the housing, so that the blocking block abuts against the insulating base, and the other end of the first pin and the other end of the second pin both extend out of the blocking block.

2. The locking type thermostat according to claim 1, characterized in that: The shell is an insulating shell, and the insulating base is also fixed with a connecting piece (10), one end of the connecting piece is connected to the insulating base, and the other end is connected to the bimetallic strip, the end of the connecting piece connected to the bimetallic strip is against a side of the shell away from the opening, and the second pin is connected to the connecting piece.

3. The locking type thermostat according to claim 2, characterized in that: The connecting piece is a spring piece.

4. The lock-type thermostat according to claim 2 or 3, characterized in that: One end of the connecting piece away from the insulating base is provided with a U-shaped bend (10-1), and one end of the bimetallic piece away from the insulating base is clamped in the U-shaped bend.

5. The locking type thermostat according to claim 4, characterized in that: An abutment portion (10-2) is provided at one end of the U-shaped bend that is not connected to the bimetallic strip, and the abutment portion abuts against the bimetallic strip.

6. The locking type thermostat according to claim 2 or 3, characterized in that: The blocking block and the insulating base are arranged separately.

7. The locking type thermostat according to claim 2 or 3, characterized in that: The second pin is integrally arranged with the connecting piece.

8. The locking type thermostat according to claim 2 or 3, characterized in that: The first pin is integrally arranged with the bottom plate.

9. The locking type thermostat according to claim 1, characterized in that: The blocking block is integrally arranged with the insulating base.

10. The locking type thermostat according to any one of claims 1 to 3 and 9, characterized in that: The card hole is replaced by a card slot.

Images