CN211906102U

CN211906102U - Very small portable temperature controller for kettle

Info

Publication number: CN211906102U
Application number: CN202020721159.3U
Authority: CN
Inventors: 杨强; 郑和生; 杨立阳
Original assignee: Zhejiang Jiatai Electrical Appliance Co Ltd
Current assignee: Zhejiang Jiatai Electrical Appliance Co Ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2020-11-10
Anticipated expiration: 2030-05-06

Abstract

The utility model provides a minimum portable temperature controller for kettle, including setting up the heating contact switch in temperature sensing bimetal actuator below, the heating contact switch including take first stationary contact and fixed mounting first stationary contact on the main casing body, the first movable contact arm of being connected with the external connection piece, help moving the porcelain rod, the below of the first stationary contact place end of first stationary contact is arranged in to the expansion end of first movable contact arm, and the external connection piece contact jaw is connected to the other end of first movable contact arm, and first stationary contact is the inboard of first stationary contact place end and has the first through-hole that supplies to help moving the porcelain rod and pass with the opening of first stationary contact area interval, help moving the porcelain rod and pass first through-hole and erect the butt between temperature sensing bimetal actuator and first movable contact arm expansion end. The power-assisted porcelain rod can be arranged at the staggered position of the movable contact arm and the static contact piece, the space occupied by the whole contact switch can be greatly reduced, the structure is more compact, the electric tea set type electric appliance is integrally minimized, and the power-assisted porcelain rod is particularly suitable for a portable kettle.

Description

Very small portable temperature controller for kettle

Technical Field

The utility model relates to a temperature sensing switch device especially relates to an electricity temperature controller subassembly for tea set class electrical apparatus.

Background

The electric heating kettle is a common household small appliance in life, and generally has the functions of automatic power off after water is boiled and dry heating and power off prevention. The electric kettle usually comprises a host and a base which are arranged in a split mode, wherein a temperature controller used for disconnecting a circuit when water is boiled or is burnt dry is arranged at the bottom of the host, the base is used for being connected with a household power supply, and the host can enable the temperature controller to be communicated with the household power supply when being in butt joint with the base, so that power supply of the host can be realized. The temperature controller adopts a contact switch to be matched with a bimetallic actuator to realize circuit breaking during water boiling or dry burning, and a general contact switch sequentially comprises a power-assisted ceramic rod, a movable contact arm and a static contact piece from top to bottom, wherein the movable contact arm and the static contact piece are abutted under the power-assisted ceramic rod. The convenient requirements of people cannot be met.

Disclosure of Invention

The utility model provides a gearbox, which is provided with a temperature controller which is extremely small and safe and can be used for a portable kettle.

In order to solve the technical problem, the utility model discloses a following technical scheme: a temperature controller for a tiny portable kettle comprises a main shell and a fixing plate provided with a thermosensitive bimetallic actuator, wherein a plurality of external wiring sheets are arranged on the main shell, a plurality of contact switches for driving a contact arm and a static contact piece are respectively arranged on the external wiring sheets, a movable contact is arranged on the movable contact arm, a static contact is arranged on the static contact piece, the contact switches comprise a heating contact switch arranged below the thermosensitive bimetallic actuator, the heating contact switch comprises a first static contact piece with a first static contact and fixedly arranged on the main shell, a first movable contact arm connected with the external wiring sheets and an auxiliary moving ceramic rod, the movable end of the first movable contact arm is arranged below the end where the first static contact of the first static contact piece is arranged, the external wiring sheet is connected with the other end of the first movable contact arm, the contact end of the first static contact piece is arranged on the inner side of the end where the first static contact is arranged, and a first through hole for the auxiliary moving ceramic rod to pass through is arranged at a distance from the first static contact, the power-assisted ceramic rod penetrates through the first through hole and is vertically abutted between the thermosensitive bimetal actuator and the movable end of the first movable contact arm.

As an improvement: the movable contact arm of the contact switch and the external connection piece are integrally formed, namely the movable end of the movable contact arm is a movable end, and the other end of the movable contact arm is the external connection piece.

As an improvement: the movable contact arm of integrated into one piece is for being L shape movable contact arm, L shape movable contact arm including take the horizontal arm portion of expansion end, buckle from the other end of horizontal arm portion and extend the wiring portion of buckling that is the lug, from horizontal arm portion or the outside both sides of the wiring portion of buckling limit extension and with the main casing body both sides armful arm of being connected of can cooperating, the main casing body on open and to have the supply L shape movable contact arm bending line portion of taking to pass exposed fixed orifices.

As an improvement: the main casing body is provided with a positioning column, a positioning hole matched and positioned with the positioning column is formed in the contact end of the first static contact piece, and the first static contact piece is positioned in the horizontal direction in the main casing body through the matching connection of the positioning column and the positioning hole.

As an improvement: the first stationary contact, the first through hole and the positioning hole are sequentially distributed on the contact end of the first stationary contact along the length direction of the first stationary contact with intervals.

As an improvement: the first stationary contact part is provided with a first pressing cover which is embedded and pressed on the main shell, a first limiting hole for supporting a limiting movement assisting porcelain rod is formed in the first pressing cover, and the first stationary contact part is fastened and limited on the main shell through the first pressing cover pressed on the first stationary contact part.

As an improvement: the contact switch on the external wiring piece comprises an overheating protection contact switch serving as a self-fusing protection device, the overheating protection contact switch comprises a second static contact piece with a second static contact, a second movable contact arm, an overheating protection ejector rod and a second pressing cover with a second limiting hole and used for supporting the second static contact piece of the limiting and overheating protection ejector rod, the overheating protection ejector rod is an insulating fusible plastic piece with a fixed melting point and formed integrally, a contact matched with the second static contact is arranged on the movable end of the second movable contact arm, a fixing plate through hole for the overheating protection ejector rod to penetrate through is formed in the fixing plate, the overheating protection ejector rod penetrates through the fixing plate through hole and the second limiting hole and stands between the second movable contact arm and a heating element at the bottom of the container, the second movable contact arm is supported by the overheating protection ejector rod to abut against and is in normally closed connection with the static contact, the anti-back-sliding convex ring is arranged on the periphery of the lower portion of the over-temperature protection ejector rod, the maximum diameter of the anti-back-sliding convex ring is larger than the diameter of the second limiting hole, when the over-temperature protection ejector rod is supported between the second movable contact arm and a heating element at the bottom of the container, the anti-back-sliding convex ring is located below the second gland and far away from the second limiting hole, when the heating element is overheated and exceeds the fixed melting point temperature of the over-temperature protection ejector rod and the temperature control fails, the over-temperature protection ejector rod is automatically fused, the height of the over-temperature protection ejector rod is reduced, the second movable contact arm loses the abutting support to jump upwards, and the second movable contact arm is disconnected from being in electric contact with the second stationary contact, so that the container is.

The utility model discloses a temperature controller, because the first through-hole that helps move the porcelain rod and pass static contact erect the butt between the first movable contact arm expansion end of temperature sensing bimetal actuator and static contact below, this design makes and helps move the porcelain rod and can set up on the staggered position of movable contact arm and static contact, can dwindle the shared space size of whole contact switch greatly for the structure is more compact, and electric tea set class electrical apparatus is whole to be miniaturated, especially is fit for portable kettle and uses. The first stationary contact is arranged at the end part, a certain distance is reserved between the first through hole for the assistant ceramic rod to pass through and the first stationary contact, the stroke requirement between the assistant ceramic rod and the contact can be ensured, and the contact switch can be opened and closed stably.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic front view of a first embodiment of a temperature sensitive controller with a self-fusing protection device according to the present invention.

Fig. 2 is a schematic view of the backside structure of fig. 1.

Fig. 3 is a schematic structural view of fig. 1 after the fixing plate is removed.

Fig. 4 is an exploded view of fig. 1.

Fig. 5 is a schematic structural view of the movable contact arm.

Fig. 6 is a schematic structural diagram of a second embodiment of the temperature sensitive controller with the self-fusing protection device according to the present invention.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, the utility model provides a first embodiment of minimum portable temperature controller for kettle, including main casing body 1, the fixed plate 2 of installing temperature sensing bimetal actuator 7, main casing body 1 is last to install a plurality of external connection piece, a plurality of external connection piece on be equipped with the contact switch that a plurality of drove contact arm and static contact piece respectively, the movable contact arm on have a movable contact, static contact piece on have a static contact, the movable contact arm and the external connection piece of this embodiment contact switch are integrated into one piece, movable contact arm movable contact place end promptly is the expansion end, the other end of movable contact arm is external connection piece. The integrated movable contact arm is an L-shaped movable contact arm, the L-shaped movable contact arm comprises a cross arm part 31 with a movable end, a bent wiring part 32 which is bent from the other end of the cross arm part 31 and extends to form a wiring piece, two side edges of the cross arm part 31 extend outwards to form two side holding arms 33 which can be connected with the main shell in a matched mode, and the main shell 1 is provided with a fixing hole 12 for enabling the bent wiring part 32 of the L-shaped movable contact arm to penetrate through the exposed fixing hole. This L shape movable contact arm and fixed orifices 12's structural design both make with the stationary contact, can stably cooperate between the external connection, the root of the wiring portion 32 of buckling can support and lean on the inner wall of fixed orifices 12, effectively avoids the swing deformation of the wiring portion 32 of buckling, and the degree of depth through fixed orifices 12 gives the support of the wiring portion 32 of buckling, neither increases the volume and the spare part of temperature controller, can provide effective support again, design benefit. The two side holding arms 33 can enable the movable contact arm to be stably assembled on the main shell, and the assembly is very convenient. Of course, the two side arms 33 can be arranged on both sides of the bent wire connecting portion 32 according to the position requirement. The contact switch of the embodiment comprises a heating contact switch arranged below a heat-sensitive bimetallic actuator 7 and an overheating protection contact switch of a self-fusing protection device, wherein the heating contact switch comprises a first fixed contact A4 which is provided with a first fixed contact A41 and is fixedly arranged on a main shell 1, a first movable contact arm A3 connected with an external wire and an auxiliary moving porcelain rod A5, the movable end of the first movable contact arm A3 is arranged below the end where the first fixed contact A41 is arranged on the first fixed contact A4, the other end of the first movable contact arm A3 is connected with the external wire, the contact end of the first fixed contact A4, namely the inner side of the end where the first fixed contact A41 is arranged, and a first through hole A42 for the auxiliary moving porcelain rod A5 to pass through is formed in a distance with the first fixed contact A41, and the auxiliary moving porcelain rod A5 passes through the first through hole A42 and abuts between the heat-sensitive bimetallic actuator and the movable contact arm A3. The main casing 1 is provided with a positioning column 11, the contact end of the first fixed contact piece A4 is provided with a positioning hole 43 which is matched and positioned with the positioning column 11, and the first fixed contact piece A4 is positioned in the horizontal direction in the main casing 1 through the matching connection of the positioning column 11 and the positioning hole 43. The first stationary contact A41, the first through hole A42 and the positioning hole 43 are sequentially distributed on the contact end of the first stationary contact A4 with a pitch along the length direction of the first stationary contact A4. The structural distribution on the first static contact A4 is very compact and reasonable, and is beneficial to miniaturization. A first gland A6 which is embedded and pressed on the main shell 1 is arranged above the contact end of the first static contact A4, a first limit hole A61 which supports and limits the limit movement-assisting porcelain rod A5 is arranged on the first gland A6, and the first static contact A4 is fastened and limited on the main shell 1 up and down through the first gland A6 which is pressed on the first static contact A4. Through the spacing first static contact of first gland, non-screw fastening, security and insulating nature are higher.

The overheat protection contact switch of the self-fusing protection device of the embodiment comprises a second static contact component B4 with a second static contact B41, a second movable contact arm B3, an overheat protection ejector rod B5, and a second pressing cover B6 with a second limiting hole B61 for supporting a second static contact component B4 of a limiting overheat protection ejector rod B5, wherein the overheat protection ejector rod B5 is an insulating fusible plastic part with a fixed melting point and integrated molding, a contact matched with the second static contact B41 is arranged at the movable end of the second movable contact arm B3, a fixing plate through hole 21 for the overheat protection ejector rod B5 to pass through is arranged on the fixing plate 2, the overheat protection ejector rod B5 passes through the fixing plate through hole 21 and a second limiting hole B61 to be erected between the second movable contact arm B3 and a heating element at the bottom of the container, the second movable contact arm B3 is supported by the overheat protection ejector rod B5 and is in normally contacted with the static contact pin B41, the periphery of the lower part of the over-temperature protection ejector rod B5 is provided with an anti-reverse sliding convex ring B51, the maximum diameter of the anti-reverse sliding convex ring is larger than the diameter of a second limiting hole B61, when the over-temperature protection ejector rod B5 is supported between a second movable contact arm B3 and a heating element at the bottom of the container, the anti-reverse sliding convex ring B51 is positioned below a second gland B6 and is far away from the second limiting hole B61, under the condition that the heating element is overheated and exceeds the fixed melting point temperature of the over-temperature protection ejector rod B5 and the temperature control fails, the over-temperature protection ejector rod B5 is automatically fused, the height of the over-temperature protection ejector rod B5 is reduced, the second movable contact arm B3 loses abutting pressure support and jumps up, and the second movable contact arm B3 is disconnected from being in electric contact with a second static contact B41, so that the container. Because the self-fusing safety device is adopted and combined with the contact switch, the overheating safety function is realized, and the final safety function can be well realized even if the bimetallic strip fails. When the electric tea set type electric appliance is in a normal working state, the temperature of the heating element is lower than the melting point of the over-temperature protection ejector rod, the over-temperature protection ejector rod is in a stable solid state, the second movable contact arm is in electric contact and normally closed connection with the second stationary contact under the support of the over-temperature protection ejector rod, a circuit of the electric tea set type electric appliance is in a normal working state, and the temperature sensitive controller also works normally; under the condition that the heating element of electric tea set electrical equipment is overheated and the bimetal temperature control is invalid, namely under the condition that the circuit can not be disconnected even if the temperature exceeds the set temperature, when the temperature of the heating element in the electrical equipment product exceeds the melting point of the over-temperature protection ejector rod, the upper part of the over-temperature protection ejector rod on the direct contact heating element is melted, the height of the over-temperature protection ejector rod is shortened, the movable contact arm loses the abutting force of the over-temperature protection ejector rod, the movable contact arm is separated from the static contact under the action of the self deformation restoring force, so that the circuit is disconnected, the danger caused by the continuous temperature rise of an electric appliance product is prevented, because the top of the over-temperature protection ejector rod is in direct contact with the heating element to obtain heat data, no intermediate element exists, no data failure exists, and compared with the existing method for indirectly obtaining temperature data, the temperature sensing of the scheme of the embodiment is more accurate, the sensitivity is high, the anti-interference performance and the stability are higher, and the cost is low. The whole structure is simple, and the temperature-sensitive controller can be universally used in the existing temperature-sensitive controllers of electric tea sets. And moreover, the over-temperature protection ejector rod is integrally formed, so that the processing process steps and time of the temperature controller are shortened, the processing difficulty and cost are reduced, and the precision and stability of the temperature controller are well guaranteed.

The second embodiment shown in fig. 6 is a thermostat with two thermally sensitive bimetallic actuators 7, which is not provided with an overheat protection contact switch of the self-fusing protection device. The lower parts of the two thermal bimetallic actuators 7 are both heating contact switches.

Although the present invention has been described with reference to the specific embodiments, it should be understood that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a minimum portable temperature controller for kettle, includes main casing body (1), installs fixed plate (2) of temperature sensing bimetal actuator (7), install a plurality of external wiring piece on main casing body (1), a plurality of external wiring piece on be equipped with the contact switch that a plurality of drive touched arm and static contact spare respectively, the movable contact arm on have a movable contact, static contact spare on have a static contact, its characterized in that: the contact switch comprises a heating contact switch arranged below the thermal bimetallic actuator (7), the heating contact switch comprises a first static contact piece (A4) which is provided with a first static contact (A41) and is fixedly arranged on the main shell (1), a first movable contact arm (A3) connected with an external wiring sheet, and an auxiliary ceramic rod (A5), the movable end of the first movable contact arm (A3) is arranged below the end of the first stationary contact (A4) where the first stationary contact (A41) is located, the other end of the first movable contact arm (A3) is connected with an external connection wire, a first through hole (A42) for a moving-assistant porcelain rod (A5) to pass through is formed in the inner side of the end of the first stationary contact (A41) where the contact end of the first stationary contact (A4) is located and has a distance with the first stationary contact (A41), the power-assisted ceramic rod (A5) penetrates through the first through hole (A42) to be vertically abutted between the heat-sensitive bimetallic actuator and the movable end of the first movable contact arm (A3).

2. The very small portable temperature controller for water jug according to claim 1, characterized in that: the movable contact arm of the contact switch and the external connection piece are integrally formed, namely the movable end of the movable contact arm is a movable end, and the other end of the movable contact arm is the external connection piece.

3. The very small portable temperature controller for water jug according to claim 2, characterized in that: the movable contact arm of integrated into one piece is for being L shape movable contact arm, L shape movable contact arm including take xarm portion (31) of movable end, buckle from xarm portion (31) other end and extend and be bending type wiring portion (32) of lug, xarm portion (31) or bending type wiring portion (32) both sides limit outwards extend with main casing body both sides armful arm (33) that can cooperate the connection, main casing body (1) on open and to have and supply L shape movable contact arm bending type wiring portion (32) to pass exposed fixed orifices (12).

4. The very small portable thermostat for water bottles of claim 1, 2 or 3, characterized in that: the main casing body (1) on be equipped with reference column (11), first static contact spare (A4) contact end on open and to have with reference column (11) cooperation location locating hole (43), be connected through the cooperation of reference column (11) and locating hole (43) and make first static contact spare (A4) fix a position in main casing body (1) horizontal direction.

5. The very small portable temperature controller for water jug according to claim 4, characterized in that: the first static contact (A41), the first through hole (A42) and the positioning hole (43) are sequentially distributed on the contact end of the first static contact (A4) along the length direction of the first static contact (A4) with intervals.

6. The very small portable thermostat for water bottles of claim 1, 2 or 3, characterized in that: a first gland (A6) embedded and pressed on the main shell (1) is arranged above the contact end of the first static contact piece (A4), a first limiting hole (A61) supporting a limiting and movement assisting porcelain rod (A5) is formed in the first gland (A6), and the first static contact piece (A4) is fastened and limited on the main shell (1) up and down through a first gland (A6) pressed on the first static contact piece (A4).

7. The very small portable temperature controller for water jug according to claim 4, characterized in that: a first gland (A6) embedded and pressed on the main shell (1) is arranged above the contact end of the first static contact piece (A4), a first limiting hole (A61) supporting a limiting and movement assisting porcelain rod (A5) is formed in the first gland (A6), and the first static contact piece (A4) is fastened and limited on the main shell (1) up and down through a first gland (A6) pressed on the first static contact piece (A4).

8. The very small portable temperature controller for water jug according to claim 5, characterized in that: a first gland (A6) embedded and pressed on the main shell (1) is arranged above the contact end of the first static contact piece (A4), a first limiting hole (A61) supporting a limiting and movement assisting porcelain rod (A5) is formed in the first gland (A6), and the first static contact piece (A4) is fastened and limited on the main shell (1) up and down through a first gland (A6) pressed on the first static contact piece (A4).

9. The very small portable thermostat for water bottles of claim 1, 2 or 3, characterized in that: the contact switch on the external wiring board comprises an overheating protection contact switch serving as a self-fusing protection device, the overheating protection contact switch comprises a second static contact piece (B4) with a second static contact (B41), a second movable contact arm (B3), an overheating protection ejector rod (B5) and a second pressing cover (B6) with a second limiting hole (B61) for supporting a second static contact piece (B4) of a limiting overheating protection ejector rod (B5), the overheating protection ejector rod (B5) is an insulating fusible plastic piece with a fixed melting point and formed integrally, a contact matched with the second static contact piece (B41) is arranged at the movable end of the second movable contact arm (B3), a fixing plate through hole (21) for the overheating protection ejector rod (B5) to penetrate through is formed in the fixing plate (2), the overheating protection ejector rod (B5) penetrates through the fixing plate through hole (21) and the second limiting hole (B61) to be erected between the second movable contact arm (B3) and the heating element at the bottom of the second movable contact arm (B3), the second movable contact arm (B3) is supported by an over-temperature protection ejector rod (B5) to be abutted against and normally closed connected with a static contact (B41) in electric contact, an anti-reverse-sliding convex ring (B51) is arranged on the periphery of the lower portion of the over-temperature protection ejector rod (B5), the maximum diameter of the anti-reverse-sliding convex ring is larger than the diameter of a second limiting hole (B61), when the over-temperature protection ejector rod (B5) is supported between the second movable contact arm (B3) and a heating element at the bottom of the container, the anti-reverse-sliding convex ring is positioned below a second gland (B6) and far away from the second limiting hole (B61), when the heating element is overheated to exceed the fixed melting point temperature of the over-temperature protection ejector rod (B5) and the temperature control is failed, the over-temperature protection ejector rod (B5) is automatically fused, the height of the over-temperature protection ejector rod (B5) is lowered, the second movable contact arm (B3) loses the abutting against and supports, and the second movable contact arm (B3) is disconnected from the static contact (B41, thereby providing overheating protection for the container.

10. The very small portable temperature controller for water jug according to claim 4, characterized in that: the contact switch on the external wiring board comprises an overheating protection contact switch serving as a self-fusing protection device, the overheating protection contact switch comprises a second static contact piece (B4) with a second static contact (B41), a second movable contact arm (B3), an overheating protection ejector rod (B5) and a second pressing cover (B6) with a second limiting hole (B61) for supporting a second static contact piece (B4) of a limiting overheating protection ejector rod (B5), the overheating protection ejector rod (B5) is an insulating fusible plastic piece with a fixed melting point and formed integrally, a contact matched with the second static contact piece (B41) is arranged at the movable end of the second movable contact arm (B3), a fixing plate through hole (21) for the overheating protection ejector rod (B5) to penetrate through is formed in the fixing plate (2), the overheating protection ejector rod (B5) penetrates through the fixing plate through hole (21) and the second limiting hole (B61) to be erected between the second movable contact arm (B3) and the heating element at the bottom of the second movable contact arm (B3), the second movable contact arm (B3) is supported by an over-temperature protection ejector rod (B5) to be pressed and is in electric-contact normally-closed connection with the stationary contact (B41), an anti-reverse-sliding convex ring is arranged on the periphery of the lower part of the over-temperature protection ejector rod (B5), the maximum diameter of the anti-reverse-sliding convex ring is larger than that of the second limiting hole (B61), when the over-temperature protection ejector rod (B5) is supported between the second movable contact arm (B3) and a heating element at the bottom of the container, the anti-reverse-sliding convex ring is positioned below the second gland (B6) and is far away from the second limiting hole (B61), under the condition that the heating element is overheated and exceeds the fixed melting point temperature of the over-temperature protection ejector rod (B5) and the temperature control fails, the over-temperature protection ejector rod (B5) is fused automatically, the height of the over-temperature protection ejector rod (B5) is reduced, the second movable contact arm (B463) loses pressing support and jumps upwards, and the second movable contact arm (B3) is disconnected from the stationary contact (B, thereby providing overheating protection for the container.