A push rod positioning mechanism for a temperature controller

Abstract

The present invention discloses a push rod positioning mechanism of a temperature controller, the temperature controller comprises at least one body, a spring sheet, a fixing sheet, a push rod and a bimetallic sheet, one end of the spring sheet is fixed in the body, a contact point is fixed on one side of the other end of the spring sheet, the fixing sheet is fixed in the body and abuts against the contact point of the spring sheet, the bimetallic sheet is placed at the opening end of the body, one end of the push rod abuts against the spring sheet, and the other end contacts the bimetallic sheet, the fixing sheet is provided with a through hole, and the push rod passes through the fixing sheet through hole. The push rod positioning mechanism of the temperature controller of the present invention is a fixing sheet for positioning the push rod fixed in the body, and since it is not shielded by the existing guide cover, the thermostat only needs to perform one measurement to accurately measure the distance between the spring sheet and the fixing sheet, and then select a suitable push rod according to the distance, and the measurement process is reduced.

Description

Technical Field

[0001] The invention relates to a thermal switch device, in particular to a push rod positioning mechanism of a temperature controller. Background Art

[0002] In electric heating appliances, thermostats and temperature fuses are required as control and safety protection devices. When the temperature around the thermostat rises above the safe temperature, the moving contact piece in the thermostat will separate from the static contact piece under the action of heat and disconnect the circuit to prevent the temperature from rising further and burning the electrical appliance. The temperature fuse works when the thermostat loses its function.

[0003] For example, the invention patent with authorization announcement number CN n03120182U discloses a combined temperature control mechanism, which includes a thermostat; the thermostat includes a locking frame, a main body, and a temperature control group located in the main body; the temperature control group includes a bimetallic strip, a guide cover, a porcelain rod, a rivet, a fixing sheet, and a spring sheet with a contact; the locking frame is matched with the main body through an aluminum cover. Among them, the center of the guide cover has a through hole corresponding to the porcelain rod for the porcelain rod to pass through, and the top surface of the guide cover is used to place the spring bimetallic strip. After the guide cover is assembled, it is necessary to measure the distance from the top surface of the guide cover to the spring strip, so as to select a suitable porcelain rod. However, since the guide cover is a plastic part and is covered on the top of the main body to shield the main body, it is necessary to measure from the through hole of the guide cover. The through hole of the guide cover is extremely small, the measurement is difficult, and the measurement accuracy is low. The distance between the top of the porcelain rod and the metal sheet directly determines the temperature limit value to be protected by the thermostat. In order to ensure the measurement accuracy, after the porcelain rod is installed in the guide cover, it is necessary to measure again whether the distance of the porcelain rod exposed from the top surface of the guide cover meets the requirements. Therefore, the thermostat of this structure needs to be measured more than twice to ensure the accuracy of the top rod. The measurement process is numerous and complicated, and it takes a lot of time.

[0004] In view of this, the designer has made in-depth considerations and actively researched, improved and tried to develop the present invention in order to solve the many deficiencies and inconveniences caused by the imperfect design of the top rod positioning structure of the above-mentioned thermostat. Summary of the invention

[0005] The object of the present invention is to provide a push rod positioning mechanism for a temperature controller which is convenient for positioning a push rod and has a simple structure and is easy to measure.

[0006] In order to achieve the above object, the solution of the present invention is:

[0007] A push rod positioning mechanism for a temperature controller, the temperature controller comprises at least a main body, a spring sheet, a fixing sheet, a push rod and a bimetallic strip, one end of the spring sheet is fixed in the main body, a contact point is fixed to one side of the other end of the spring sheet, the fixing sheet is fixed in the main body and abuts against the contact point of the spring sheet, the bimetallic strip is placed at the open end of the main body, one end of the push rod abuts against the spring sheet, and the other end contacts the bimetallic strip, the fixing sheet is provided with a through hole, and the push rod passes through the through hole of the fixing sheet.

[0008] A convex wall is extended from the peripheral edge of the through hole of the fixing plate toward the direction of the bimetallic strip.

[0009] The fixing plate is provided with at least one notch.

[0010] The fixing sheet has a double-layer structure.

[0011] The fixing plate is composed of two connecting plates which are connected to the filling bag or embedded in each other.

[0012] The top of the inner wall of the body forms a clamping wall, and the edge of the bimetallic strip is clamped on the clamping wall.

[0013] The inner wall of the body is provided with a plurality of ridges at equal intervals, and each ridge forms the clamping wall.

[0014] A step is formed between the top of the body and the inner wall of the body, and the step forms the clamp wall.

[0015] A protruding block is arranged on the inner wall of the body, and the fixing sheet is locked on the block.

[0016] After adopting the above structure, the ejector rod positioning mechanism of the temperature controller of the present invention is a fixing plate for positioning the ejector rod fixed in the body. Since it is not shielded by the existing guide cover, the thermostat only needs to perform one measurement to accurately measure the distance between the spring plate and the fixing plate, and then select a suitable ejector rod according to the distance, and the measurement process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded view of the first embodiment of the present invention.

[0018] Figure 2 It is a combined cross-sectional view of the first embodiment of the present invention.

[0019] Figure 3 It is a schematic structural diagram of a second embodiment of the fixing plate of the present invention.

[0020] Figure 4 It is a schematic structural diagram of a third embodiment of the fixing plate of the present invention.

[0021] Figure 5 It is a schematic structural diagram of a fourth embodiment of the fixing plate of the present invention.

[0022] Figure 6 Schematic diagram of the structure of the fifth embodiment of the fixing plate of the present invention.

[0023] Figure 7 Schematic diagram of the structure of the sixth embodiment of the fixing plate of the present invention.

[0024] Figure 8 Schematic diagram of the structure of the seventh embodiment of the fixing plate of the present invention.

[0025] Fig. 9 It is a schematic structural diagram of an eighth embodiment of the fixing plate of the present invention. DETAILED DESCRIPTION

[0026] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0027] like Figure 1 , Figure 2 As shown in the figure, a first preferred embodiment of the present invention is shown in the figure, a push rod positioning mechanism of a thermostat of the present invention, the thermostat comprises a body 1, a spring 2, a push rod 3, a bimetallic strip 4 and a fixing plate 5, one end of the spring 2 is fixed in the body 1, and a contact 6 is fixed on one side of the other end of the spring 2, the bimetallic strip is clamped on the top of the inner wall of the body 1, the fixing plate 5 is fixed in the body 1, and is arranged above the spring 2, and there are many ways to fix the fixing plate 5 and the body 1, for example, a block can be protruded on the inner wall of the body 1, and the fixing plate 5 is locked in the block. The fixing plate 5 is fixed with another contact 7 that contacts the contact of the spring 2 at the position corresponding to the contact 6 of the spring 2, and the fixing plate 5 is also provided with a through hole 51, the push rod 3 passes through the through hole 51, one end of the push rod 3 is against the spring 2, and the other end is located below the bimetallic spring 4. A card wall 11 is formed at the top of the inner wall of the main body 1, and the edge of the bimetallic strip 4 is stuck on the card wall 11. As shown in the figure, in this embodiment, a plurality of ridges are evenly spaced on the inner wall of the main body, and each ridge forms the card wall 11. The bimetallic strip 4 is stuck on each ridge. In addition, the structure of the card wall 11 can be various. For example, a step is formed between the top of the main body and the inner wall between the main body 1, and the step is the card wall 11.

[0028] like Figure 3 FIG. 2 is a second embodiment of the fixing plate 5 of the present invention. In this embodiment, a convex wall 52 is extended from the periphery of the through hole 51 of the fixing plate 5 toward the bimetallic strip 4 to make the push rod 3 more stable when placed.

[0029] like Figure 4 FIG. 2 shows a third embodiment of the fixing plate 5 of the present invention. In this embodiment, at least one notch 53 is provided on the fixing plate 5 to reduce the weight of the fixing plate 5 .

[0030] like Figure 5 As shown, it is the fourth embodiment of the fixing plate 5 of the present invention. This embodiment is based on the fourth embodiment. A convex wall 52 extends from the periphery of the through hole 51 of the fixing plate 5 toward the bimetallic strip 4 to make the push rod 3 more stable when placed.

[0031] like Figure 6 FIG. 5 shows a fifth embodiment of the fixing plate 5 of the present invention. In this embodiment, the fixing plate 5 is a double-layer structure and can be composed of different materials.

[0032] like Figure 7 As shown, the sixth embodiment of the fixing plate 5 of the present invention is based on the fifth embodiment. A convex wall 52 extends from the periphery of the through hole 51 of the fixing plate 5 toward the bimetallic strip 4 to make the push rod 3 more stable when placed.

[0033] like Figure 8 As shown, it is the seventh embodiment of the fixing plate 5 of the present invention. In this embodiment, the fixing plate 5 is composed of two connecting plates that are connected by filling or embedded in each other. Different materials can be combined to reduce the weight of the fixing plate 5.

[0034] like Fig. 9 As shown, the eighth embodiment of the fixing plate 5 of the present invention is based on the seventh embodiment. A convex wall 52 extends from the periphery of the through hole 51 of the fixing plate 5 toward the bimetallic strip 4 to make the push rod 3 more stable when placed.

[0035] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A push rod positioning mechanism for a thermostat, the thermostat comprising at least a body, a spring, a fixing plate, a push rod and a bimetallic strip, one end of the spring is fixed in the body, one side of the other end of the spring is fixed with a contact point, the fixing plate is fixed in the body and abuts against the contact point of the spring, the bimetallic strip is placed at the open end of the body, one end of the push rod abuts against the spring, and the other end is located below the bimetallic strip, Features: The fixing plate is provided with a through hole, and the push rod passes through the fixing plate through hole; a clamping wall is formed on the top of the inner wall of the main body, and the edge of the bimetallic strip is clamped on the clamping wall.

2. A push rod positioning mechanism for a thermostat as claimed in claim 1, Features: A convex wall is extended from the peripheral edge of the through hole of the fixing plate toward the direction of the bimetallic strip.

3. A push rod positioning mechanism for a thermostat as claimed in claim 1 or 2, Features: The fixing plate is provided with at least one notch.

4. A push rod positioning mechanism for a thermostat as claimed in claim 1 or 2, Features: The fixing sheet has a double-layer structure.

5. A push rod positioning mechanism for a thermostat as claimed in claim 1 or 2, Features: The fixing plate is composed of two connecting plates which are connected to the filling bag or embedded in each other.

6. A push rod positioning mechanism for a thermostat as claimed in claim 1, Features: The inner wall of the body is provided with a plurality of ridges at equal intervals, and each ridge forms the clamping wall.

7. A push rod positioning mechanism for a thermostat as claimed in claim 1, Features: A step is formed between the top of the body and the inner wall of the body, and the step forms the clamp wall.

8. The push rod positioning mechanism of a thermostat according to claim 1, Features: A protruding block is arranged on the inner wall of the body, and the fixing sheet is locked on the block.

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