CN210743869U

CN210743869U - Coupler structure with overheat protection function

Info

Publication number: CN210743869U
Application number: CN201921945621.1U
Authority: CN
Inventors: 黄普添
Original assignee: Guangdong Huilaide Temperature Controller Co ltd
Current assignee: Guangdong Huilaide Temperature Controller Co ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-06-12
Anticipated expiration: 2029-11-12

Abstract

Take overheat protection function's coupler structure, comprising a base, the conducting strip, conducting circuit and overheat protection device, be equipped with touch switch on the conducting circuit, touch switch includes movable contact and static contact, overheat protection device, the conducting strip, conducting circuit fixes on the pedestal, overheat protection device includes the temperature sensing granule, push rod and leading truck, the last cavity of conducting strip and the recessed chamber intercommunication of leading truck constitute the temperature sensing chamber of placing the temperature sensing granule, push rod one end makes movable contact and static contact offset, the push rod other end offsets with the one end of temperature sensing granule, the other end of temperature sensing granule offsets with the temperature sensing inner wall in temperature sensing chamber. This kind of coupler forms sealed temperature sensing chamber between conducting strip and the leading truck, utilizes temperature sensing particle and temperature sensing chamber to offset, and the heat transfer on the conducting strip is for the temperature sensing particle, and the temperature sensing particle reaches and sets for the temperature value after warping, and the push rod has lost the overdraft of temperature sensing particle, can take place the displacement to make the movable contact reset, cut off the power supply with the separation of static contact, realize overheat protection's effect.

Description

Coupler structure with overheat protection function

Technical Field

The utility model belongs to the technical field of the coupler technique that household electrical appliances used and specifically relates to a take over-heating protection function's coupler structure.

Background

Existing coupled power-on products, such as: the electric heating kettle uses a coupler, however, the existing coupler structure generally comprises an upper coupler and a lower coupler, the upper coupler comprises a seat body, a conductive circuit for inputting a power supply is arranged on the seat body, a touch switch is arranged on the conductive circuit, the touch switch comprises a movable contact piece and a static contact piece, and when the upper coupler is seated on the lower coupler, the upper coupler is connected with an external power supply through the lower coupler; however, when the current of the upper coupler is too large or the heating temperature is too high, the upper coupler cannot be immediately powered off for protection, so that household appliances are damaged, and even certain potential safety hazards exist.

Therefore, a part of household electrical appliances are provided, a fuse is additionally arranged on the coupler, and the fuse is connected with a conductive circuit of the upper coupler in series, so that when the flowing current is too high and generates higher temperature, the fuse can be fused, and the upper coupler is protected by power failure; however, such a coupler still has the following disadvantages: the fuse wire is directly exposed and is easy to damage or break; the fuse wire is only overheat protection when the current is too large, and the surface temperature of a measured object cannot be directly detected, such as: and the power is cut off for protection when the temperature of the bottom wall of the inner container is overheated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of above-mentioned prior art existence, and provide a simple structure, reasonable, difficult impaired or fracture, detectable measured object surface temperature is overheated and the coupler structure of outage protection.

The purpose of the utility model is realized like this:

the coupler structure with overheat protection function comprises a seat body and a heat conducting fin, wherein the heat conducting fin is arranged on the seat body, the seat body is provided with a conductive circuit, the conductive circuit is provided with a touch switch, the touch switch comprises a movable contact piece and a static contact piece, it is characterized by also comprising an overheating protection device which is fixed on the seat body, the overheat protection device comprises temperature sensing particles, a push rod and a guide frame, an upper concave cavity is formed on the heat conducting sheet, a lower concave cavity is formed on the guide frame, the guide frame is arranged at the bottom of the heat conducting sheet, the upper concave cavity and the lower concave cavity are communicated with each other to form a temperature sensing cavity, the temperature sensing particles are positioned in the temperature sensing cavity, one end of the push rod is abutted against the movable contact piece, the other end of the push rod penetrates through the guide frame and extends into the temperature sensing cavity to abut against one end of the temperature sensing particles, and the other end of the temperature sensing particles abuts against the temperature sensing inner wall of the temperature sensing cavity. This kind of coupler, through add overheat protection device on the pedestal, form sealed temperature sensing chamber between conducting strip and the leading truck, utilize the temperature sensing granule directly to offset with the temperature sensing chamber, heat on the conducting strip can the quick transmission for the temperature sensing granule, the temperature sensing granule reaches and sets for the temperature value and can warp, at this moment, the push rod has lost the holding down force of temperature sensing granule, can take place the displacement, thereby make the movable contact piece reset, with the static contact piece separation, the touch switch disconnection, realize overheat protection's effect, its whole simple structure, it is reasonable, moreover, the temperature sensing granule is hidden in the temperature sensing chamber, avoid directly exposing, it is not fragile or fracture.

The purpose of the utility model can also adopt the following technical measures to solve:

furthermore, the upper concave cavity and the lower concave cavity are abutted in a manner of opening to opening, and the temperature sensing cavity is formed together. The openings of the upper concave cavity and the lower concave cavity are sealed, so that the heat of the temperature sensing cavity is not easy to escape, the heat can be intensively transferred to the temperature sensing particles, and the temperature sensing particle temperature measurement is more accurate.

Furthermore, a hollow bulge is arranged on the heat conducting sheet, a bulge inner cavity forms the upper concave cavity, and the guide frame is fixed at the bottom opening of the bulge inner cavity so that the lower concave cavity of the guide frame is communicated with the upper concave cavity. Therefore, the top wall of the hollow bulge is the top wall of the temperature sensing cavity, and the temperature sensing particles can be directly conveyed to the temperature sensing particles due to the heat conduction sheets, so that the overheating protection of the temperature sensing particles is more accurate. And, the last cavity roof of conducting strip is direct to offset with the heat-generating body, and the heat of heat-generating body is direct to transmit for the temperature sensing granule through the temperature sensing chamber roof easily, and the leading truck is made by thermal insulation material for the heat of heat-generating body can only transmit for the temperature sensing granule through the temperature sensing chamber roof, makes the heat of heat-generating body concentrate the transmission for the temperature sensing granule like this, avoids the heat to transmit for the pedestal by the leading truck, not only makes the temperature sensing granule temperature measurement more accurate, improves the security performance of pedestal again.

Furthermore, the guide frame is made of thermal insulation materials, a push rod hole communicated with the lower cavity is formed in the guide frame, the upper end of the push rod is arranged in the temperature sensing cavity, the lower end of the push rod penetrates through the push rod hole and abuts against the movable contact piece, the push rod hole limits the push rod to move up and down only along the axial direction of the push rod hole, the lower end of the push rod is aligned with the movable contact piece in a positioning mode, the movable contact piece can be accurately pressed down by the push rod to abut against the static contact piece, and the push rod is reliable in.

Further, the temperature sensing particles are hard particles which become powder, liquid or gas after the heating temperature reaches a set value. The volume change of the temperature sensing particles is utilized to make the push rod lose the downward pressure, so that the movable contact piece can lift the push rod by the elasticity of the movable contact piece, and the movable contact piece and the static contact piece are separated to cut off the power.

Furthermore, the seat body is provided with a movable contact piece and a static contact piece according to the high position and the low position respectively, the movable contact piece stands upright in a static state, and the push rod presses the movable contact piece downwards so as to enable the movable contact piece to move downwards to be abutted against the static contact piece for electrifying.

Furthermore, the conductive circuit of the seat body comprises an annular metal conductive sheet, and a movable contact and a static contact of the touch switch are communicated with the annular metal conductive sheet.

Furthermore, a first supporting part and a second supporting part are arranged on the seat body, one end of the guide frame is in concave-convex insertion connection with the top of the first supporting part and fixed, the other end of the guide frame abuts against the top surface of the second supporting part, a mouth-shaped channel is formed among the seat body, the guide frame, the first supporting part and the second supporting part, the movable contact spring penetrates through the mouth-shaped channel, and the push rod hole is located above the movable contact spring. The first supporting part, the second supporting part, the seat body and the guide frame limit the positions of the movable contact spring and the push rod together, so that the lower end of the push rod is always abutted against the movable contact spring, and the normal operation of the overheat protection function of the coupler is ensured.

Furthermore, a slot is formed in the top of the second supporting part, one end, corresponding to the guide frame, is arranged in the slot, and the slot limits the left-right displacement of one end, corresponding to the guide frame, so that the push rod hole of the guide frame is aligned with the movable contact piece.

Furthermore, an annular convex edge is arranged at the upper end of the push rod or close to the upper end, and the diameter of the annular convex edge is larger than that of the push rod hole. The annular ledge prevents the push rod from being removed from the push rod aperture.

The beneficial effects of the utility model are as follows.

This kind of coupler, through add overheat protection device on the pedestal, form sealed temperature sensing chamber between conducting strip and the leading truck, utilize the temperature sensing granule directly to offset with the temperature sensing chamber, heat on the conducting strip can the quick transmission for the temperature sensing granule, the temperature sensing granule reaches and sets for the temperature value and can warp, at this moment, the push rod has lost the holding down force of temperature sensing granule, can take place the displacement, thereby make the movable contact piece reset, with the static contact piece separation, the touch switch disconnection, realize overheat protection's effect, its whole simple structure, it is reasonable, moreover, the temperature sensing granule is hidden in the temperature sensing chamber, avoid directly exposing, it is not fragile or fracture.

Secondly, the openings of the upper concave cavity and the lower concave cavity are sealed, so that the heat of the temperature sensing cavity is not easy to escape, the heat can be intensively transferred to the temperature sensing particles, and the temperature measurement of the temperature sensing particles is more accurate.

Moreover, the top wall of the hollow bulge is the top wall of the temperature sensing cavity, and the temperature sensing particles can be attached to the heat conducting sheet, so that heat can be directly transmitted to the temperature sensing particles, and the overheating protection of the temperature sensing particles is more accurate. And, the last cavity roof of conducting strip is direct to offset with the heat-generating body, and the heat of heat-generating body is direct to transmit for the temperature sensing granule through the temperature sensing chamber roof easily, and the leading truck is made by thermal insulation material for the heat of heat-generating body can only transmit for the temperature sensing granule through the temperature sensing chamber roof, makes the heat of heat-generating body concentrate the transmission for the temperature sensing granule like this, avoids the heat to transmit for the pedestal by the leading truck, not only makes the temperature sensing granule temperature measurement more accurate, improves the security performance of pedestal again.

In addition, the first supporting part, the second supporting part, the seat body and the guide frame limit the positions of the movable contact piece and the push rod together, so that the lower end of the push rod is always abutted against the movable contact piece, and the normal operation of the overheat protection function of the coupler is ensured; the slotting limits the left and right displacement of one end corresponding to the guide frame, so that the push rod hole of the guide frame is aligned with the movable contact piece; the annular ledge prevents the push rod from being removed from the push rod aperture.

Drawings

Fig. 1 is a perspective view of a modified structure of a coupler with an overheat protection function according to an embodiment.

Fig. 2 is an exploded structural view of a modified structure of a coupler with an overheat protection function according to an embodiment.

Fig. 3 is a sectional structural view of a modified structure of the coupler with overheat protection function according to the embodiment.

Fig. 4 is another sectional structural view of a modified structure of the coupler with overheat protection function according to the embodiment.

Detailed Description

The invention is further illustrated by the following figures and examples.

In a first embodiment, as shown in fig. 1 to 4, an improved structure of a coupler with an overheat protection function includes a base 1 and a heat conducting strip 2, the heat conducting strip 2 is installed on the base 1, a conducting circuit 3 is installed on the base 1, a touch switch 4 is installed on the conducting circuit 3, the touch switch 4 includes a movable contact 41 and a stationary contact 42, and is characterized by further including an overheat protection device 5, the overheat protection device 5 is fixed on the base 1, the overheat protection device 5 includes a temperature sensing particle 51, a push rod 52 and a guide frame 53, an upper concave cavity 20 is formed on the heat conducting strip 2, a lower concave cavity 50 is formed on the guide frame 53, the guide frame 53 is disposed at the bottom of the heat conducting strip 2, the upper concave cavity 20 and the lower concave cavity 50 are mutually communicated to form a temperature sensing cavity 6, the temperature sensing particle 51 is disposed in the temperature sensing cavity 6, one end of the push rod 52 abuts against the movable contact 41, so that the movable contact piece 41 abuts against the stationary contact piece 42, the other end of the push rod 52 penetrates through the guide frame 53 and extends into the temperature sensing cavity 6 to abut against one end of the temperature sensing particles 51, and the other end of the temperature sensing particles 51 abuts against the temperature sensing inner wall of the temperature sensing cavity 6.

Referring to fig. 3 and 4, the heat conducting strip 2 is provided with a hollow protrusion 21, an inner cavity of the protrusion 21 forms the upper cavity 20, the guide frame 53 is fixed at an opening at the bottom of the inner cavity of the protrusion 21, and the upper cavity 20 and the lower cavity 50 are abutted and communicated in an opening-to-opening manner to form the temperature sensing cavity 6 together. The guide frame 53 is provided with a push rod hole 54 communicated with the lower cavity 50, the upper end of the push rod 52 is provided with an annular convex edge 521, the diameter of the annular convex edge 521 is larger than that of the push rod hole 54, the upper end of the push rod 52 is arranged in the temperature sensing cavity 6, and the lower end of the push rod 52 penetrates through the push rod hole 54 and abuts against the movable contact piece 41.

Referring to fig. 2 to 4, a first supporting portion 11 and a second supporting portion 12 are disposed on the seat body 1, one end of the guide frame 53 is fixed to the top of the first supporting portion 11 in a concave-convex insertion manner, the other end of the guide frame 53 abuts against the top surface of the second supporting portion 12, a "mouth" shaped channel 10 is formed among the seat body 1, the guide frame 53, the first supporting portion 11 and the second supporting portion 12, the movable contact 41 passes through the "mouth" shaped channel 10, and the push rod hole 54 is located above the movable contact 41, preferably, a slot 13 is disposed at the top of the second supporting portion 12, and one end of the guide frame 53 is disposed in the slot 13. The guide frame 53 is a diamond-shaped block-shaped or strip-shaped part made of heat insulation materials, the two ends of the guide frame 53 are symmetrical, through holes are formed in the two ends of the guide frame 53, positioning columns are arranged on the first supporting portion 11, the through holes in one end of the guide frame 53 are fixedly connected with the positioning columns in an inserting mode, and the preferred guide frame 53 is made of plastics.

In this embodiment, the heat conducting sheet 2, the hollow protrusion 21 and the temperature sensing cavity 6 are integrally formed, and the seat body 1, the first supporting portion 11 and the second supporting portion 12 are integrally formed, that is, the heat conducting sheet 2 and the seat body 1 are respectively formed, so that the manufacturing is easy.

The temperature sensing particles 51 are hard particles which become powder, liquid or gas after the heating temperature reaches a set value; the hard particles can be solid particle quartz sand which can be changed into powder after being heated to a certain degree; of course, the hard particles may be ordinary plastic pellets, which are partially melted and deformed after being heated to some extent.

More specifically, the base 1 is provided with a movable contact piece 41 and a fixed contact piece 42 at high and low positions, respectively, the movable contact piece 41 is vertically raised in a static state, and the push rod 52 pushes down the movable contact piece 41 to move the movable contact piece 41 downward to abut against the fixed contact piece 42 for conduction. The conductive circuit 3 of the base 1 includes an annular metal conductive plate 30, and the static contact 42 of the touch switch 4 is electrically connected to the annular metal conductive plate 30.

The working principle is as follows: using electric kettle as an example, the utility model relates to an upper coupler, its pedestal 1 is fixed respectively on kettle body and kettle seat with lower coupler, and the kettle body is sat on the kettle seat, and pedestal 1 and lower coupler circular telegram cooperation of pegging graft each other because the kettle body generate heat set with conducting strip 2 counterbalance, promptly with the protruding 21 roof of cavity on the conducting strip 2 counterbalance, the temperature sensing spare will generate heat the heat of dish and transmit for temperature sensing granule 51 fast, reaches the setting value when temperature sensing granule 51's temperature, promptly: when the temperature of the heating plate is too hot, the temperature sensing particles 51 are heated and deformed, and if the temperature sensing particles 51 become powder, the push rod 52 loses the downward pressure of the temperature sensing particles 51 and can be displaced, so that the movable contact piece 41 is reset and separated from the static contact piece 42, the touch switch 4 is switched off, and the overheat protection effect of the electric kettle is realized.

Claims

1. A coupler structure with an overheat protection function comprises a base body (1) and a heat conducting sheet (2), wherein the heat conducting sheet (2) is installed on the base body (1), a conducting circuit (3) is arranged on the base body (1), a touch switch (4) is arranged on the conducting circuit (3), the touch switch (4) comprises a movable contact piece (41) and a static contact piece (42), and the coupler structure is characterized by further comprising an overheat protection device (5), the overheat protection device (5) is fixed on the base body (1), the overheat protection device (5) comprises temperature sensing particles (51), a push rod (52) and a guide frame (53), an upper concave cavity (20) is formed on the heat conducting sheet (2), a lower concave cavity (50) is formed on the guide frame (53), the guide frame (53) is arranged at the bottom of the heat conducting sheet (2), and the upper concave cavity (20) and the lower concave cavity (50) are mutually communicated to form a temperature sensing cavity (6), the temperature sensing particles (51) are positioned in the temperature sensing cavity (6), one end of the push rod (52) abuts against the movable contact piece (41) so as to enable the movable contact piece (41) to abut against the static contact piece (42), the other end of the push rod (52) penetrates through the guide frame (53) and extends into the temperature sensing cavity (6) to abut against one end of the temperature sensing particles (51), and the other end of the temperature sensing particles (51) abuts against the temperature sensing inner wall of the temperature sensing cavity (6).

2. The coupler structure with the overheat protection function according to claim 1, wherein the upper concave cavity (20) and the lower concave cavity (50) are abutted in an opening-to-opening manner to jointly form the temperature sensing cavity (6).

3. The coupler structure with the overheat protection function according to claim 2, wherein the heat conducting sheet (2) is provided with a hollow protrusion (21), the cavity of the protrusion (21) forms the upper cavity (20), and the guide frame (53) is fixed to the bottom opening of the cavity of the protrusion (21) so that the lower cavity (50) of the guide frame (53) is communicated with the upper cavity (20).

4. The coupler structure with the overheat protection function according to claim 1, wherein the guide frame (53) is made of a heat insulating material, a push rod hole (54) communicated with the lower cavity (50) is formed in the guide frame (53), the upper end of the push rod (52) is arranged in the temperature sensing cavity (6), and the lower end of the push rod (52) penetrates through the push rod hole (54) and abuts against the movable contact piece (41).

5. The coupler structure with the overheat protection function according to any one of claims 1 to 4, wherein the temperature sensing particles (51) are hard particles which become powder, liquid or gas after the temperature reaches a set value.

6. The structure of a coupler with an overheat protection function according to claim 1, wherein the base body (1) is provided with a movable contact piece (41) and a stationary contact piece (42) at high and low positions, respectively, the movable contact piece (41) stands upright in a static state, and the push rod (52) presses down the movable contact piece (41) to move the movable contact piece (41) downward to abut against the stationary contact piece (42) for conducting electricity.

7. The coupler structure with overheat protection function according to claim 1, wherein the conductive circuit (3) of the base (1) comprises an annular metal conductive sheet (30), and the movable contact (41) and the stationary contact (42) of the touch switch (4) are communicated with the annular metal conductive sheet (30).

8. The coupler structure with the overheat protection function according to claim 4, wherein the seat body (1) is provided with a first supporting portion (11) and a second supporting portion (12), one end of the guide frame (53) is fixed to the top of the first supporting portion (11) in a concave-convex insertion manner, the other end of the guide frame (53) abuts against the top surface of the second supporting portion (12), a mouth-shaped channel (10) is formed among the seat body (1), the guide frame (53), the first supporting portion (11) and the second supporting portion (12), the movable contact (41) penetrates through the mouth-shaped channel (10), and the push rod hole (54) is located above the movable contact (41).

9. The coupler structure with the overheat protection function according to claim 8, wherein a slot (13) is formed at the top of the second supporting portion (12), and one end of the guide frame (53) is disposed in the slot (13).

10. The coupler structure with the overheat protection function according to claim 4, wherein an annular convex edge (521) is provided at or near the upper end of the push rod (52), and the diameter of the annular convex edge (521) is larger than that of the push rod hole (54).