CN211088167U

CN211088167U - Magnetic-sensing temperature controller

Info

Publication number: CN211088167U
Application number: CN201922369001.4U
Authority: CN
Inventors: 翁国华
Original assignee: Chuandong Magnetic Electronic Co Ltd
Current assignee: Chuandong Magnetic Electronic Co Ltd; Foshan Chuandong Magnetoelectricity Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-07-24
Anticipated expiration: 2029-12-24

Abstract

The utility model discloses a magnetic-sensing temperature controller, which comprises an outer shell with an opening at the upper end, an inner shell arranged in the inner cavity of the outer shell, a heat conducting cover arranged at the upper end of the outer shell, a temperature sensing soft magnet arranged at the top of the inner shell and connected with the heat conducting cover in a heat conducting way, a hard magnet arranged in the inner cavity of the inner shell, a spring arranged between the temperature sensing soft magnet and the hard magnet, a connecting circuit fixedly arranged in the inner cavity of the outer shell, and a movable contact spring used for connecting or disconnecting the connecting circuit; the hard magnet comprises a base and a boss arranged on the base, and the movable contact spring is sleeved on the boss; the hard magnet is positioned below the temperature-sensing soft magnet. Compared with the existing temperature controller, the on-off of the connecting circuit can be controlled only by the movable contact spring, an action push rod is not needed, the structure is simpler, and the defects of the action push rod structure are fundamentally overcome.

Description

Magnetic-sensing temperature controller

Technical Field

The utility model relates to a temperature controller field, in particular to magnetic-sensing temperature controller.

Background

Traditional bimetallic strip temperature controller includes comparatively complicated actuating mechanism, and the bimetallic strip has certain radian, and the action push rod needs to match with the bimetallic strip radian, and the production process is very loaded down with trivial details, and the equipment degree of difficulty is big. Similarly, the existing magnetically sensitive temperature controller is also the same as a bimetallic strip temperature controller, and has a relatively complex actuating mechanism, an actuating push rod needs to be arranged at the bottom of a hard magnet, and the actuating push rod is used for triggering the on-off of a microswitch, in order to adapt to the installation of the actuating push rod, a blind hole needs to be formed at the bottom of the hard magnet, and then the actuating push rod is inserted into the blind hole, but the materials of the actuating push rod and the hard magnet belong to non-elastic deformation materials, the size processing is difficult, the fit clearance between the two is difficult to control, the fit clearance is easy to loosen when being too large, the fit clearance is too small and difficult to assemble, so the assembly is very difficult. In addition, after the magnetic-sensing temperature controller adopting the action push rod triggering structure is used for a long time, the action push rod and the hard magnet are not connected and loosened, the safety and the reliability of the product are greatly reduced, and the use of a user has safety risks.

It is seen that improvements and enhancements to the prior art are needed.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a magnetically sensitive temperature controller without the need of actuating a push rod.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a magnetic-sensing temperature controller comprises an outer shell with an opening at the upper end, an inner shell arranged in an inner cavity of the outer shell, a heat conducting cover covered at the upper end of the outer shell, a temperature-sensing soft magnet arranged at the top of the inner shell and connected with the heat conducting cover in a heat conducting manner, a hard magnet arranged in the inner cavity of the inner shell, a spring arranged between the temperature-sensing soft magnet and the hard magnet, a connecting circuit fixedly arranged in the inner cavity of the outer shell, and a movable contact spring used for connecting or disconnecting the connecting circuit; the hard magnet comprises a base and a boss arranged on the base, and the movable contact spring is sleeved on the boss; the hard magnet is positioned below the temperature sensing soft magnet, and when the temperature sensing soft magnet and the hard magnet are magnetically attracted, the spring elasticity is overcome to enable the movable contact piece to be communicated with the connecting circuit; when the temperature-sensing soft magnet loses magnetism, the spring pushes the hard magnet to be far away from the temperature-sensing soft magnet so as to disconnect the connecting circuit of the movable contact piece.

The movable contact piece is annular, two folding lugs are respectively arranged on two sides of the movable contact piece, and each folding lug is provided with a movable contact; the inner ring of the movable contact spring is provided with flanges which are bent upwards, and the diameter of the circumference surrounded by the tops of the flanges is smaller than that of the boss.

The connecting circuit comprises a first terminal and a second terminal which are fixedly arranged on the shell, and a first static contact and a second static contact which are respectively in conductive connection with the first terminal and the second terminal, wherein the free ends of the first static contact and the second static contact are respectively provided with a static contact, and the static contacts on the first static contact and the second static contact face towards the corresponding moving contacts.

The first terminal and the second terminal are inserting pieces, two slots are symmetrically formed in the bottom of the shell, the inner ends of the first terminal and the second terminal are inserted into the corresponding slots, and the outer ends of the first terminal and the second terminal extend out of the shell respectively; the first static contact and the first terminal are connected through rivets and fixed on the shell, and the second static contact and the second terminal are connected through rivets and fixed on the shell.

The inner wall of the inner shell is provided with an annular step, at least two positioning blocks protrude inwards on the inner wall of the inner shell, the temperature sensing soft magnet comprises a temperature sensing part in contact with the heat conduction cover and a positioning part arranged below the temperature sensing part, the positioning part is provided with positioning grooves matched with the positioning blocks, each positioning block is clamped in the corresponding positioning groove, the diameter of the temperature sensing part is larger than that of the positioning part, the temperature sensing part is pressed against the top of the inner shell, and the positioning part is pressed against the step.

The boss of hard magnet is packed into in the inner ring of step, the downside of step is equipped with the spacing lug that two symmetries set up and many along the first spacing sand grip of angle settings such as circumference, and these spacing lugs and first spacing sand grip all set up on the inner wall of inner shell and vertical downwardly extending sets up, be equipped with the notch with spacing sand grip looks adaptation on the base of hard magnet.

And a plurality of second limiting convex strips which are arranged at equal angles along the circumferential direction are arranged on the inner wall of the step.

The upper end of the boss is provided with a blind hole for mounting a spring, and the top end of the spring is propped against the bottom surface of the temperature-sensing soft magnet.

The outer side wall of the upper end of the inner shell is provided with at least two clamping blocks, the inner wall of the outer shell is provided with corresponding clamping grooves, and the inner shell and the outer shell are radially positioned through the clamping blocks and the clamping grooves.

Has the advantages that:

the utility model provides a magnetic-sensing temperature controller, compared with the existing temperature controller, the connection and disconnection of the connection circuit can be controlled only by a movable contact spring, and an action push rod is not needed, so that the structure is simpler, and the defects of the action push rod structure are fundamentally solved; the movable contact spring is firmly sleeved on the boss, the main body of the movable contact spring is pressed on the base in a propping mode, the assembly is simple, the loosening phenomenon can not occur even in long-term use, and the safety and the reliability of the product are guaranteed.

Drawings

Fig. 1 is a schematic structural view of the magnetic-sensing temperature controller provided by the present invention.

Fig. 2 is an exploded view of the magnetic-sensing temperature controller provided by the present invention.

Fig. 3 is a perspective view of the magnetic-sensing temperature controller provided by the present invention.

Fig. 4 is a perspective view of the movable contact piece in the magnetic-sensing temperature controller provided by the present invention.

Fig. 5 is a perspective view of the inner shell of the magnetic-sensing temperature controller provided by the present invention.

Detailed Description

The utility model provides a magnetic-sensing temperature controller, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the following refers to the attached drawing and the embodiment is lifted the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.

Referring to fig. 1-3, the present invention provides a magnetic-sensing temperature controller, which includes an outer shell 1 with an opening at the upper end, an inner shell 2 disposed in the inner cavity of the outer shell, a heat conducting cover 3 covering the upper end of the outer shell, a temperature-sensing soft magnet 4 disposed on the top of the inner shell and connected with the heat conducting cover in a heat conducting manner, a hard magnet 5 disposed in the inner cavity of the inner shell, a spring 6 disposed between the temperature-sensing soft magnet and the hard magnet, a connecting circuit 7 fixedly disposed in the inner cavity of the outer shell, and a movable contact 8 for connecting or disconnecting the connecting circuit; the hard magnet 5 comprises a base 51 and a boss 52 arranged on the base, and the movable contact piece 8 is sleeved on the boss 52; the hard magnet 5 is positioned below the temperature sensing soft magnet 4, and when the temperature sensing soft magnet 4 and the hard magnet 5 are magnetically attracted, the elastic force of the spring 6 is overcome to make the movable contact piece connect with the connecting circuit; when the temperature-sensing soft magnet 4 loses magnetism, the spring 6 pushes the hard magnet 5 to be far away from the temperature-sensing soft magnet so as to disconnect the connecting circuit of the movable contact piece.

The following brief description is made on the working principle: the heat conducting cover 3 is in heat conducting connection with the temperature sensing soft magnet 4 (namely, the heat conducting cover 3 is tightly attached to the upper end face of the temperature sensing soft magnet 4, or heat conducting silicone grease is filled in a gap between the heat conducting cover 3 and the temperature sensing soft magnet 4), heat generated by temperature rise of the product main part is transmitted to the temperature sensing soft magnet through the heat conducting cover, when the product main part starts to heat, the temperature of the temperature sensing soft magnet 4 is lower than the Curie temperature of the temperature sensing soft magnet 4, the temperature sensing soft magnet 4 has magnetism, the temperature sensing soft magnet 4 and the ferromagnetic magnet 5 are magnetically attracted, the boss 51 and the bottom of the temperature sensing soft magnet 4 are attracted with each other, the ferromagnetic magnet 5 is driven to overcome gravity and elastic force of the spring 6 to move upwards, the movable contact piece 8 sleeved on the boss 51 also moves upwards. When the temperature of the temperature-sensing soft magnet 4 gradually rises to be higher than the Curie temperature, the magnetism of the temperature-sensing soft magnet 4 disappears, and the spring 6 pushes the hard magnet 5 to be far away from the temperature-sensing soft magnet 4 so as to disconnect the movable contact piece 8 from the connecting circuit. Compared with the prior art, the connection and disconnection of the connecting circuit 7 can be controlled only by the movable contact spring 8, an action push rod is not needed, the structure is simpler, and the defects of the action push rod structure are fundamentally overcome; the movable contact spring is firmly sleeved on the boss, the main body of the movable contact spring is pressed on the base in a propping mode, the assembly is simple, the loosening phenomenon can not occur even in long-term use, and the safety and the reliability of the product are guaranteed.

Specifically, referring to fig. 4, the movable contact piece 8 is in a ring shape, two folding lugs 81 are respectively arranged on two sides of the movable contact piece 8, and each folding lug is provided with a movable contact 82; the inner ring of the moving contact piece 8 is provided with flanges 83 which are bent upwards, and the diameter of the circumference surrounded by the top ends of the flanges 83 is smaller than that of the boss 52. The main body, the flanging and the folding lug of the movable contact spring are formed by processing metal plates, the structural strength is high, the manufacture is easy, and the secondary assembly is not needed. During assembly, only the movable contact piece is sleeved on the boss until the bottom of the movable contact piece is pressed against the base; the diameter of the circumference surrounded by the top ends of the flanges is smaller than that of the bosses, the flanges are metal sheets and have certain elastic deformation capacity, and the flanges form a radial locking force on the bosses, so that the flanges are tightly pressed on the side walls of the bosses, the radial and axial positioning of the movable contact piece is realized, the movable contact piece is prevented from being loosened after long-term use, and the accurate triggering position of the movable contact and the connecting circuit is ensured.

Further, referring to fig. 1 and 2, the connection circuit 7 includes a first terminal 71 and a second terminal 72 fixedly disposed on the housing, and a first static contact 73 and a second static contact 74 conductively connected to the first terminal and the second terminal 72 of the first terminal 71 and the second terminal 72, respectively, the free ends of the first static contact 73 and the second static contact 74 are both provided with a static contact 75, and the static contacts of the first static contact 73 and the second static contact 74 face to the corresponding movable contact 82. First static contact and second static contact are the C font, offer on the lateral wall of inner shell and supply the leading-in mouth of dodging of static contact, and these static contacts are located the top that corresponds the movable contact, through setting up like this, connecting circuit's compact structure utilizes the space between shell and the inner shell ingeniously, also reduces the assembly degree of difficulty simultaneously.

Preferably, referring to fig. 1 to fig. 3, the first terminals 71 and the second terminals 72 are insertion pieces, two slots 11 are symmetrically formed in the bottom of the housing 1, inner ends of the first terminals 71 and the second terminals 72 are inserted into the corresponding slots 11, and outer ends of the first terminals 71 and the second terminals 72 extend out of the housing respectively; the first stationary contact piece 73 and the first terminal 71 are connected and fixed to the housing 1 by a rivet 9, and the second stationary contact piece 74 and the second terminal 72 are connected and fixed to the housing 1 by the rivet 9. Through setting up like this, the location of first terminal, second terminal, first static contact, second static contact is accurate, and long-term use can not take place the skew, and first terminal and second terminal can carry out the conducting connection with other electrical components again.

Preferably, referring to fig. 5, an annular step 21 is disposed on the inner wall of the inner casing 2, at least two positioning blocks 22 protrude inward from the inner wall of the inner casing, the temperature sensing soft magnet 4 includes a temperature sensing portion 41 contacting with the heat conducting cover and a positioning portion 42 disposed below the temperature sensing portion, a positioning groove 43 adapted to the positioning block is disposed on the positioning portion 42, each positioning block is clamped in the corresponding positioning groove 43, the diameter of the temperature sensing portion 41 is greater than that of the positioning portion 42, the temperature sensing portion 41 abuts against the top of the inner casing 2, and the positioning portion 42 abuts against the step 21. During assembly, the connection can be completed only by directly installing the positioning part of the temperature sensing soft magnet into the inner cavity of the inner shell, so that the assembly is convenient and quick; the heat conducting cover and the steps axially position the temperature sensing soft magnet to prevent the temperature sensing soft magnet from moving under the action of magnetic attraction; the temperature sensing soft magnet is prevented from rotating in the inner shell through the matching of the positioning part and the positioning groove.

Preferably, referring to fig. 2 and 5, the boss of the hard magnet 5 is installed in the inner ring of the step 21, two symmetrically arranged limiting protrusions 23 and a plurality of first limiting convex strips 24 arranged at equal angles along the circumferential direction are arranged on the lower side of the step 21, the limiting protrusions 23 and the first limiting convex strips 24 are both arranged on the inner wall of the inner shell 2 and vertically extend downward, and a notch 53 adapted to the limiting convex strips is arranged on the base 52 of the hard magnet 5. On one hand, the limiting protrusion limits the hard magnet to rotate, so that the position accuracy of a movable contact connecting circuit on the movable contact piece is guaranteed, on the other hand, the limiting convex strip can guide the hard magnet to vertically ascend or descend, and the hard magnet moves smoothly and stably. Further restrict the base radial movement amplitude of hard magnet through first spacing sand grip, prevent to rock the range too big of skew.

Preferably, referring to fig. 5, a plurality of second limiting convex strips 25 arranged along the circumference at equal angles are arranged on the inner wall of the step 21. Through setting up the spacing sand grip of second, restrict the base radial motion range of hard magnet, prevent to rock the range of skew too big.

Preferably, referring to fig. 2, the upper end of the boss 51 is provided with a blind hole 54 for mounting the spring 6, and the top end of the spring 6 is pressed against the bottom surface of the temperature-sensitive soft magnet 4. When the ferromagnetic body and the temperature-sensing soft magnet are magnetically attracted, the spring is hidden in the blind hole, and the connection of the boss and the positioning part of the temperature-sensing soft magnet is not interfered.

Preferably, referring to fig. 2 and 5, at least two locking blocks 26 are arranged on an outer side wall of an upper end of the inner shell 2, corresponding locking grooves 12 are formed on an inner wall of the outer shell 1, and the inner shell 2 and the outer shell 1 are radially positioned through the locking blocks 26 and the locking grooves 12. During assembly, the connection can be completed only by inserting the inner shell into the inner cavity of the outer shell, so that convenience and rapidness are realized; through the cooperation of fixture block and draw-in groove, prevent that the inner shell from taking place to rotate in the shell.

It is understood that equivalent substitutions or changes can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such changes or substitutions shall fall within the scope of the present invention.

Claims

1. A magnetic-sensing temperature controller is characterized by comprising an outer shell with an opening at the upper end, an inner shell arranged in an inner cavity of the outer shell, a heat conducting cover covered at the upper end of the outer shell, a temperature sensing soft magnet arranged at the top of the inner shell and connected with the heat conducting cover in a heat conducting way, a hard magnet arranged in the inner cavity of the inner shell, a spring arranged between the temperature sensing soft magnet and the hard magnet, a connecting circuit fixedly arranged in the inner cavity of the outer shell, and a movable contact spring used for connecting or disconnecting the connecting circuit; the hard magnet comprises a base and a boss arranged on the base, and the movable contact spring is sleeved on the boss; the hard magnet is positioned below the temperature sensing soft magnet, and when the temperature sensing soft magnet and the hard magnet are magnetically attracted, the spring elasticity is overcome to enable the movable contact piece to be communicated with the connecting circuit; when the temperature-sensing soft magnet loses magnetism, the spring pushes the hard magnet to be far away from the temperature-sensing soft magnet so as to disconnect the connecting circuit of the movable contact piece.

2. The magnetically sensitive temperature controller according to claim 1, wherein the movable contact is ring-shaped, and two folding ears are respectively provided on two sides of the movable contact, and each folding ear is provided with a movable contact; the inner ring of the movable contact spring is provided with flanges which are bent upwards, and the diameter of the circumference surrounded by the tops of the flanges is smaller than that of the boss.

3. The magnetically sensitive temperature controller of claim 2, wherein the connecting circuit comprises a first terminal and a second terminal fixedly disposed on the housing, and a first static contact and a second static contact conductively connected to the first terminal and the second terminal, respectively, and the free ends of the first static contact and the second static contact are both provided with static contacts, and the static contacts on the first static contact and the second static contact face the corresponding movable contacts.

4. The magnetically sensitive temperature controller according to claim 3, wherein the first terminal and the second terminal are insertion pieces, the bottom of the housing is symmetrically provided with two slots, the inner ends of the first terminal and the second terminal are inserted into the corresponding slots, and the outer ends of the first terminal and the second terminal respectively extend out of the housing; the first static contact and the first terminal are connected through rivets and fixed on the shell, and the second static contact and the second terminal are connected through rivets and fixed on the shell.

5. The magnetically sensitive temperature controller according to claim 1, wherein the inner wall of the inner case has an annular step, the inner wall of the inner case has at least two positioning blocks protruding inward, the temperature sensitive soft magnet includes a temperature sensing portion contacting the heat conductive cover and a positioning portion disposed under the temperature sensing portion, the positioning portion has positioning grooves fitted to the positioning blocks, each positioning block is snapped into the corresponding positioning groove, the diameter of the temperature sensing portion is larger than that of the positioning portion, the temperature sensing portion abuts against the top of the inner case, and the positioning portion abuts against the step.

6. The magnetically sensitive temperature controller according to claim 5, wherein the hard magnet boss is installed in the inner ring of the step, two symmetrically disposed limiting protrusions and a plurality of first limiting protrusions disposed at equal angles along the circumferential direction are disposed on the lower side of the step, the limiting protrusions and the first limiting protrusions are disposed on the inner wall of the inner shell and extend vertically downward, and the hard magnet base is provided with a notch adapted to the limiting protrusions.

7. The magnetically sensitive temperature controller according to claim 6, wherein the inner wall of the step is provided with a plurality of second limiting protrusions arranged at equal angles along the circumferential direction.

8. The magnetically sensitive temperature controller according to claim 1, wherein the upper end of the boss is provided with a blind hole for mounting a spring, and the top end of the spring is pressed against the bottom surface of the temperature sensitive soft magnet.

9. The magnetically sensitive temperature controller according to claim 1, wherein at least two clamping blocks are disposed on an outer side wall of an upper end of the inner shell, corresponding clamping grooves are disposed on an inner wall of the outer shell, and the inner shell and the outer shell are radially positioned by the clamping blocks and the clamping grooves.