Stroke-type explosion-proof structure that can be built into an electric hot water bottle

Abstract

This invention provides a stroke-type explosion-proof structure that is built into the inside of an electric hot water bottle and independently provides explosion-proof functionality in response to the pressure rise inside the bag. [Solution] The stroke-type explosion-proof structure comprises a base case 1 fused to the upper inner wall of the electric hot water bottle, a normally open limit switch 2 that controls the continuity and interruption of the heating circuit of the electric hot water bottle, and a tension rod 3 that controls the opening and closing of the normally open limit switch. The tension rod has a rod body 31, with a contact portion 32 at the upper end of the rod body and a bent portion 33 at the lower end of the rod body. The contact portion is connected so as to be in contact with the normally open limit switch, and the bent portion is fused to the lower inner wall of the electric hot water bottle. The entire explosion-proof structure is built inside the electric hot water bottle, and the continuity and interruption of the heating circuit can be controlled by the cooperation of the tension rod and the limit switch, thus enabling an explosion-proof function to be achieved independently.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric hot water bottles, and particularly relates to a stroke-type explosion-proof structure that can be built into an electric hot water bottle.

Background Art

[0002] An electric hot water bottle is an ideal item for warming hands and feet in winter, and a heat storage and heat-generating agent is enclosed inside it. When heated by electricity, the temperature rises rapidly, and a heat preservation effect can be obtained. Generally, the electric hot water bottles used in the market adopt a method of directly charging and heating through a power plug. However, during the charging process, the water temperature inside rises, and when the expansion reaches a certain level, the inner bag of the electric hot water bottle may burst, causing a potential safety accident.

[0003] To solve this problem, conventional electric hot water bottles usually have a temperature control component, which combines with an external duck-mouth type explosion-proof charging clamp to achieve an explosion-proof function. When the temperature control component detects an abnormal high temperature inside the electric hot water bottle, the explosion-proof charging clamp automatically cuts off the power supply, and an explosion-proof effect can be obtained. However, such an explosion-proof method has the following drawbacks.

[0004] First, since the explosion-proof structure is external, after the bag body and the explosion-proof charging clamp are separated, the explosion-proof function cannot be exerted. Second, since the explosion-proof function depends on the temperature control component, there is a risk of failure of the temperature control component, and the explosion-proof function can only be exerted in the case of abnormal high temperature during charging. Therefore, when the inside of the bag body is in an overpressure state due to other reasons, effective explosion-proof cannot be carried out.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The primary objective of this invention is to provide a stroke-type explosion-proof structure that can be built into an electric hot water bottle. This explosion-proof structure is built into the electric hot water bottle and, through the cooperation of a tension rod and a limit switch, controls the conduction and interruption of the heating circuit, thereby independently achieving an explosion-proof function.

[0006] Another objective of this invention is to provide a stroke-type explosion-proof structure that can be built into an electric hot water bottle, in which the explosion-proof function is activated by the pressure inside the bag. This makes it possible to achieve explosion-proof functionality even in the case of abnormally high temperatures or overpressure due to other causes. [Means for solving the problem]

[0007] To achieve the above objective, the technical means of this invention are as follows.

[0008] This invention provides a stroke-type explosion-proof structure that can be built into an electric hot water bottle, and it is, A base case that is fusion-bonded to the upper inner wall of the electric hot water bottle, A normally open limit switch that controls the continuity and interruption of the heating circuit of an electric hot water bottle, A tension rod that controls the opening and closing of the normally open limit switch, Equipped with, The tension rod has a rod body, A contact portion is provided at the upper end of the rod body. A bent portion is provided at the lower end of the rod body. The contact portion is connected to the normally open limit switch so as to be able to contact it. The aforementioned bent portion is fusion-bonded to the lower inner wall of the electric hot water bottle.

[0009] Furthermore, the contact portion has a conical block structure, which allows the normally open limit switch to operate more reliably.

[0010] Furthermore, the bent portion has an L-shaped structure, and one side of the L-shaped structure is fused to the lower inner wall of the electric hot water bottle, thereby securing a large fusion area and improving the stability of the structure. Furthermore, the tension rod is made of flexible plastic, and its body is bendable and deformable. Therefore, even when the electric hot water bottle is in a contracted state, the tension rod can automatically bend to follow suit.

[0011] Furthermore, the flexible plastic includes PVC material.

[0012] Furthermore, a cover seat is integrally formed at the bottom of the base case, and a lower cover is attached to the cover seat.

[0013] A movable chamber is formed between the cover seat and the lower cover, and a first through-hole is provided in the lower cover. The normally open limit switch is located above the movable chamber, and the contact portion is movably arranged within the movable chamber and is positioned opposite the normally open limit switch. The rod body movably passes through the first through-hole, and a spring is further fitted onto the rod body. One end of the spring contacts the contact portion, and the other end contacts the inner wall of the lower cover.

[0014] Furthermore, a waterproof sealed chamber is provided inside the base case, and the waterproof sealed chamber is located above the movable chamber. The normally open limit switch is positioned inside the movable chamber, and a second through-hole is formed between the waterproof sealed chamber and the movable chamber. A waterproof diaphragm is provided in the second through-hole, and the contact portion contacts the normally open limit switch via the waterproof diaphragm.

[0015] Furthermore, the waterproof diaphragm is made of an elastic material and can deform to a predetermined extent when pressure is applied from the contact area, thereby improving the contact between the contact area and the normally open limit switch.

[0016] Furthermore, an upper inner case is installed inside the base case, and the waterproof sealed chamber is formed between the upper inner case and the base case. A heating circuit is provided inside the waterproof sealed chamber, and electrical connection terminals are provided on both the waterproof sealed chamber side and the side opposite to the waterproof sealed chamber of the upper inner case. The electrical connection terminal on the side opposite to the waterproof sealed chamber is connected to an external power source, and the electrical connection terminal on the waterproof sealed chamber side is connected to the heating circuit.

Advantages of the Invention

[0017] According to the present invention, the entire explosion-proof structure is built inside the electric kettle, and the conduction and interruption of the heating circuit are controlled by the cooperation of the tension rod and the limit switch, so that an independent explosion-proof function can be realized. In addition, since the explosion-proof function is activated by the pressure inside the bag body, the explosion-proof function can be exerted not only against overpressure caused by abnormal high temperature but also against overpressure caused by other reasons.

Brief Description of the Drawings

[0018] [Figure 1] It is a perspective view of the stroke-type explosion-proof structure according to the present invention. [Figure 2] It is an exploded perspective view of the stroke-type explosion-proof structure shown in FIG. 1. [Figure 3] It is a cross-sectional view of the stroke-type explosion-proof structure according to the present invention.

Embodiments for Carrying Out the Invention

[0019] To make the purpose, technical solution, and advantages of the present invention clearer, the present invention will be described in more detail below in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only for interpreting the present invention and do not limit the present invention. To achieve the above object, the technical means of the present invention are as follows.

[0020] As shown in Figures 1 to 3, this embodiment provides a stroke-type explosion-proof structure that can be built into an electric hot water bottle, and it is, A base case 1 is fusion-bonded to the upper inner wall of the electric hot water bottle, A normally open limit switch 2 controls the continuity and interruption of the heating circuit of an electric hot water bottle, A tension rod 3 controls the opening and closing of the normally open limit switch, Equipped with, The tension rod 3 has a rod body 31, A contact portion 32 is provided at the upper end of the rod body 31. A bent portion 33 is provided at the lower end of the rod body 31. The contact portion 32 is connected to the normally open limit switch 2 so as to be able to contact it. The bent portion 33 is fusion-bonded to the lower inner wall of the electric hot water bottle.

[0021] In this invention, the normally open limit switch 2 is composed of a microswitch. Under normal conditions, the normally open limit switch 2 is closed by the pressing action of the contact portion 32, allowing the heating circuit to conduct and the liquid inside the electric hot water bottle to be heated normally. As heating progresses and the internal pressure rises, the electric hot water bottle expands, and the gap between the upper inner wall and the lower inner wall widens. As a result, the tension rod 3 connected to the lower inner wall moves away from the normally open limit switch 2, and the contact portion 32 detaches from the normally open limit switch 2. When the pressure from the contact portion 32 is released, the normally open limit switch 2 becomes open, and the power supply to the heating circuit is cut off. As a result, power cut-off protection is achieved, and an explosion-proof function is realized.

[0022] In this invention, since the entire explosion-proof structure is located inside the electric hot water bottle, an independent explosion-proof function can be achieved through the cooperation of the tension rod 3 and the normally open limit switch 2. Furthermore, since the explosion-proof function is activated by the pressure inside the bag, it functions effectively not only against overpressure caused by abnormally high temperatures but also against overpressure caused by other factors.

[0023] A contact portion 32 provided at one end of the tension rod 3 controls the opening and closing of the normally open limit switch 2 by pressing and releasing. A bent portion 33 provided at the other end improves the fusion with the lower inner wall of the electric hot water bottle, thereby increasing the overall stability of the explosion-proof structure.

[0024] Furthermore, the contact portion 32 has a conical block structure, which allows the normally open limit switch 2 to operate more reliably.

[0025] Furthermore, the bent portion 33 has an L-shaped structure, and one side of it is fused to the lower inner wall of the electric hot water bottle, thereby securing a large fusion area and improving structural stability. Furthermore, the tension rod 3 is made of flexible plastic, and the rod body 31 is elastically bendable and deformable. Therefore, even when the electric hot water bottle is contracted, it can automatically deform and follow the movement.

[0026] Furthermore, as a flexible plastic, for example, PVC material can be used. Furthermore, a cover seat 11 is integrally formed at the bottom of the base case 1. A lower cover 4 is attached to the cover seat 11, and a movable chamber 5 is formed between the two. A first through hole 41 is formed in the lower cover 4, and the normally open limit switch 2 is positioned above the movable chamber 5. The contact portion 32 is movably positioned within the movable chamber 5 and faces the normally open limit switch 2. The rod body 31 movably passes through the first through hole 41, and a spring 6 is attached to its outer circumference. One end of the spring 6 contacts the contact portion 32, and the other end contacts the inner wall of the lower cover 4.

[0027] Under normal conditions, the contact portion 32 is pressed upward by the biasing force of the spring 6, contacting the normally open limit switch 2 and maintaining the closed state. When the bag expands and the tension rod 3 is pulled downward, the contact portion 32 also moves downward and disengages from the normally open limit switch 2, thus shutting off the heating circuit. Furthermore, the movable chamber 5 has the function of restricting the movement position of the contact portion 32, and since the contact portion 32 is guided to move only within a predetermined range within the movable chamber 5, the stability of the structure can be improved.

[0028] Furthermore, a waterproof sealed chamber 12 is provided inside the base case 1, and the waterproof sealed chamber 12 is located above the movable chamber 5. The normally open limit switch 2 is located inside the movable chamber 5, and a second through-hole 13 is formed between the waterproof sealed chamber 12 and the movable chamber 5. A waterproof diaphragm 7 is provided in the second through-hole 13, and the normally open limit switch 2 is positioned in close contact with the waterproof diaphragm 7.

[0029] Furthermore, the contact portion 32 is in contact with the normally open limit switch 2 via the waterproof diaphragm 7. Furthermore, the waterproof diaphragm 7 is made of an elastic material. The waterproof diaphragm 7 can deform to a predetermined extent when subjected to pressure from the contact portion 32, thereby improving the contact between the contact portion 32 and the normally open limit switch 2.

[0030] Furthermore, an upper inner case 8 is provided inside the base case 1. A waterproof sealed chamber 12 is formed between the upper inner case 8 and the base case 1, and a heating circuit is housed inside the waterproof sealed chamber 12. The upper inner case 8 is provided with electrical connection terminals on both the side facing the waterproof sealed chamber 12 and the side facing the waterproof sealed chamber 12. The electrical connection terminal on the side facing the waterproof sealed chamber 12 is connected to an external power supply, and the electrical connection terminal on the side facing the waterproof sealed chamber 12 is connected to the heating circuit. In this invention, the upper inner case 8 functions as a connecting member to realize an electrical connection between the external power supply and the heating circuit.

[0031] The above description is merely a preferred embodiment of the present invention and does not limit it. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should all be within the scope of protection of the present invention. [Explanation of Symbols]

[0032] 1 Base case 11 Cover seat 12 Waterproof sealed chamber 13. Second through hole 2. Normal-open limit switch 3. Tension rod 31 Rod body 32 Contact part 33. Bending section 4. Lower cover 41 First through hole 5 Movable room 6 springs 7 Waterproof diaphragm 8. Upper inner case

Claims

1. A stroke-type explosion-proof structure that can be built into an electric hot water bottle, A base case that is fusion-bonded to the upper inner wall of the electric hot water bottle, A normally open limit switch that controls the continuity and interruption of the heating circuit of an electric hot water bottle, A tension rod that controls the opening and closing of the normally open limit switch, Equipped with, The tension rod has a rod body, A contact portion is provided at the upper end of the rod body. A bent portion is provided at the lower end of the rod body. The contact portion is connected to the normally open limit switch so as to be able to contact it. The aforementioned bent portion is fusion-bonded to the lower inner wall of the electric hot water bottle. A stroke-type explosion-proof structure that can be built into an electric hot water bottle, characterized by its features.

2. The aforementioned contact portion has a conical block structure. A stroke-type explosion-proof structure that can be built into the electric hot water bottle described in feature 1.

3. The bent portion has an L-shaped structure, and one side of the L-shaped structure is fused to the lower inner wall of the electric hot water bottle. A stroke-type explosion-proof structure that can be built into the electric hot water bottle described in feature 1.

4. The tension rod is formed from flexible plastic. A stroke-type explosion-proof structure that can be built into the electric hot water bottle according to feature 1.

5. The flexible plastic includes PVC material. A stroke-type explosion-proof structure that can be built into the electric hot water bottle according to feature 4.

6. A cover seat is integrally formed at the bottom of the base case. A lower cover is attached to the aforementioned cover base. A movable chamber is formed between the cover seat and the lower cover. The lower cover is provided with a first through-hole. The normally open limit switch is positioned above the movable chamber. The contact portion is movably arranged within the movable chamber and is positioned opposite the normally open limit switch. The rod body is movably penetrated through the first through hole, A spring is further attached to the rod body. One end of the spring contacts the contact portion, The other end abuts against the inner wall of the lower cover. A stroke-type explosion-proof structure that can be built into the electric hot water bottle described in feature 1.

7. A waterproof sealed chamber is provided inside the aforementioned base case. The waterproof sealed chamber is located above the movable chamber. The normally open limit switch is located in the movable chamber. A second through-hole is formed between the waterproof sealed chamber and the movable chamber. A waterproof diaphragm is provided in the second through-hole. The contact portion contacts the normally open limit switch via the waterproof diaphragm. A stroke-type explosion-proof structure that can be built into an electric hot water bottle as described in feature 6.

8. The aforementioned waterproof diaphragm is formed of an elastic material. A stroke-type explosion-proof structure that can be built into the electric hot water bottle according to feature 7.

9. An upper inner case is provided inside the base case. The waterproof sealed chamber is formed between the upper inner case and the base case. A heating circuit is provided inside the aforementioned waterproof sealed chamber. Electrical connection terminals are provided on the side of the upper inner case that faces the waterproof sealed chamber and on the side that faces the waterproof sealed chamber, respectively. The electrical connection terminal on the opposite side of the waterproof sealed chamber is connected to an external power supply. The electrical connection terminal on the waterproof sealed chamber side is connected to the heating circuit. A stroke-type explosion-proof structure that can be built into the electric hot water bottle according to feature 7.

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