A gravity switch

Abstract

The present invention discloses a gravity switch. The gravity adjustment device includes a pressure switch and a pressure adjustment mechanism. The top of the pressure switch is connected with a fixed panel. A shrapnel is arranged between the fixed panel and the pressure switch. A contact piece is arranged below the shrapnel, and a moving contact piece abutted against the contact piece is arranged on the shrapnel; the pressure adjustment mechanism is threadedly connected with the fixed panel and abuts against the shrapnel through a first transmission rod at the bottom to adjust the snap displacement of the shrapnel; the stroke adjustment device abuts against the shrapnel through a second transmission rod. A cylindrical protective sleeve is arranged inside the stroke adjustment device. A first threaded hole is arranged inside the protective sleeve. A pressure spring is sleeved outside the threaded hole. An adjusting screw is arranged inside the threaded hole. A positioning hole is arranged on the adjusting screw. The top end of the second transmission rod is inserted into the positioning hole, and the bottom end extends out of the positioning seat and abuts against the shrapnel to adjust the on-off of the moving contact piece and the contact piece. It can cut off the power very quickly, and after the power is cut off, it is not affected by time and temperature and always remains in the power-off state. It is convenient to install, and the service life and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical switches, and particularly to a gravity switch. Background Art

[0002] A gravity switch is a gravity-sensing switch that can help users turn off the gravity sensing and play a role in power-off. For electrical appliances such as rice cookers whose inner pots can be separated from the pot bodies, it is necessary to detect whether the inner pot is correctly placed before working. Existing rice cookers use general push switches to detect the position of the inner pot. Such switches are made of ordinary plastics and have a temperature resistance below 180 degrees. Since the push switches are very close to the heating plate, and in some products, they are even directly integrated into the heating plate, the working temperature is relatively high, and it is easy for the body of the switch to melt, resulting in detection failures. In addition, the push switches work in a high-temperature environment for a long time, with a high failure rate, which affects the service life of electrical appliances such as rice cookers. Some special push switches are made of high-temperature-resistant plastics, but such products are difficult to process, and the material and manufacturing costs are high, which is not conducive to popularization in general electrical appliances.

[0003] To solve the above problems, Chinese invention patent CN208460653U discloses a gravity protection switch, which includes a pressure piece, a fixed contact piece, a spring piece, a first terminal, a second terminal, a first ejector rod, a second ejector rod, a top plate and an adjusting mechanism; a moving contact piece is provided on the spring piece; the first terminal is electrically connected to the fixed contact piece, and the second terminal is electrically connected to the spring piece; a pressure conduction rod is provided at the end of the pressure piece; when the pressure received by the pressure conduction rod is lower than a predetermined value, the moving contact piece and the fixed contact piece maintain a predetermined distance; when the pressure received by the pressure conduction rod is higher than the predetermined value, the pressure piece drives the spring piece to move downward, and the moving contact piece abuts against the fixed contact piece, so that the first terminal and the second terminal are electrically connected. In this solution, when the inner pot of an inner-pot separable electrical appliance leaves the electrical appliance, the electrical appliance automatically cuts off the power; when the inner pot is placed back into the electrical appliance, the switch receives the weight of the inner pot, and the electrical appliance automatically turns on the power, making the product more secure.

[0004] However, the following problems still exist in the use process:

[0005] (1) When the electrical appliance boils water, press the power supply to connect the circuit. After there is no water or the water has evaporated, the spring piece of the gravity switch cannot be separated in time, and the power cannot be cut off in time, resulting in long-term dry burning, which may damage the kettle and may even cause potential safety hazards in severe cases.

[0006] In view of this, it is urgent to improve the structure of the existing gravity switch so that it can cut off the power quickly, and after the power is cut off, it is not affected by time and temperature and always maintains the power-off state, is easy to install, and improves the service life and safety. Summary of the Invention

[0007] The technical problem to be solved by the present invention is that when the current electrical appliance boils water, when the power is pressed to connect the circuit, when there is no water or the water has evaporated, the spring of the gravity switch cannot be separated in time, and the power cannot be cut off in time, resulting in long-term dry boiling, which may cause damage to the kettle and may even cause safety hazards in serious cases.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a gravity switch, including a housing and a housing cover engaged with the housing, and also including:

[0009] A gravity regulating device is arranged in the housing, comprising a pressure switch and a pressure regulating mechanism connected to the pressure switch in transmission, the top of the pressure switch is connected to a fixed panel, a spring sheet is arranged between the fixed panel and the pressure switch, a contact sheet is arranged below the spring sheet, and a moving contact sheet abutting against the contact sheet is arranged on the spring sheet;

[0010] The pressure regulating mechanism is threadedly connected to the fixed panel, and the bottom thereof abuts against the spring sheet through a first transmission rod to adjust the sudden jump displacement of the spring sheet;

[0011] The stroke adjustment device is connected to the spring piece through the second transmission rod, and includes a positioning seat and a positioning cover connected by threads, a cylindrical protective sleeve is provided inside the protective sleeve, a first threaded hole is provided inside the protective sleeve, a pressure spring is provided outside the first threaded hole, an adjusting screw column is provided in the first threaded hole, and a positioning hole is provided at one end of the adjusting screw column. The top end of the second transmission rod is inserted into the positioning hole, and the bottom end extends out of the positioning seat to abut against the spring piece to adjust the on and off of the moving contact piece and the contact piece.

[0012] In the above solution, the pressure switch is clamped with the fixed panel through a stud, a ceramic tube is sleeved on the stud, and the spring piece is sleeved on the ceramic tube.

[0013] In the above scheme, the pressure switch also includes a first magnetic ring, a first terminal, a second magnetic ring, a second terminal and a third magnetic ring mounted on the ceramic tube, the contact piece and the first terminal are mounted between the first magnetic ring and the second magnetic ring, the contact piece and the first terminal are connected by wire, the spring sheet and the second terminal are mounted between the second magnetic ring and the third magnetic ring, and the spring sheet and the second terminal are electrically connected.

[0014] In the above scheme, the pressure adjustment mechanism includes a fixed shaft, a first transmission rod and an adjusting screw. The fixed shaft is threadedly connected to the fixed panel. A second threaded hole is provided in the fixed shaft. The adjusting screw is threadedly connected to the fixed shaft. The first transmission rod is placed in the second threaded hole and is located at the lower end of the adjusting screw. Its bottom surface abuts against the spring sheet. The fixed shaft rotates up and down relative to the fixed panel, and the adjusting screw rotates up and down relative to the fixed shaft.

[0015] In the above solution, an annular positioning groove is formed between the first threaded hole and the inner wall of the protective sleeve, and the pressure spring is inserted in the positioning groove.

[0016] In the above solution, a mounting groove is provided at the bottom of the stud, and a mounting pin adapted to the mounting groove is provided on the housing.

[0017] In the above scheme, the shell includes a left shell and a right shell fixed by screws, a limiting groove for accommodating the stroke adjustment device is formed between the left shell and the right shell, and a clamping groove for fixing the stroke adjustment device is provided on the inner wall of the limiting groove.

[0018] In the above solution, buckles are respectively provided on both sides of the shell cover, and buckle holes corresponding to the buckles are respectively provided on the bottom of the shell.

[0019] In the above solution, the shell cover is provided with lead holes for extending the lead wires of the first connecting terminal and the second connecting terminal.

[0020] In the above solution, mounting grooves are respectively provided on both sides of the exterior of the shell, and positioning holes are also provided on the shell cover.

[0021] Compared with the prior art, the present invention includes a gravity regulating device and a stroke regulating device. The gravity regulating device includes a pressure switch and a pressure regulating mechanism connected to the pressure switch by transmission. The top of the pressure switch is connected to a fixed panel. A spring is provided between the fixed panel and the pressure switch. A contact sheet is provided below the spring sheet. A moving contact sheet abutting against the contact sheet is provided on the spring sheet. The pressure regulating mechanism is threadedly connected to the fixed panel. The bottom abuts against the spring sheet through a first transmission rod to adjust the sudden jump displacement of the spring sheet. The stroke regulating device abuts against the spring sheet through a second transmission rod. It includes a positioning seat and a positioning cover connected by threads. A cylindrical protective sleeve is provided inside the protective sleeve. A threaded hole is provided inside the protective sleeve. A pressure spring is provided outside the threaded hole. An adjusting screw is provided inside the threaded hole. One end of the adjusting screw is provided with a positioning hole. The top end of the second transmission rod is inserted into the positioning hole. The bottom end extends out of the positioning seat to abut against the spring sheet to adjust the on and off of the moving contact sheet and the contact sheet. The power can be cut off very quickly, and it is not affected by time and temperature after the power is cut off. It always keeps the power off state. It is easy to install and improves the service life and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the gravity switch in the present invention;

[0023] Figure 2 is a cross-sectional view of the gravity switch of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the housing of the gravity switch in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the right housing of the gravity switch in the present invention;

[0026] Figure 5 It is a structural schematic diagram of the housing cover of the gravity switch in the present invention;

[0027] Figure 6 It is a schematic structural diagram of the protective cover of the gravity switch in the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the adjusting screw column of the gravity switch in the present invention. DETAILED DESCRIPTION

[0029] The present invention provides a gravity switch, which can quickly cut off the power supply, and is not affected by time and temperature after the power supply is cut off, and can always maintain the power-off state, is easy to install, and has a long service life and safety. The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0030] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the gravity switch provided by the present invention includes a housing and a housing cover 2 engaged with the housing, and also includes:

[0031] The gravity regulating device 3 is arranged in the housing, and includes a pressure switch and a pressure regulating mechanism connected to the pressure switch in transmission. A fixed panel 31 is connected to the top of the pressure switch. A spring sheet 33 is arranged between the fixed panel 31 and the pressure switch. A contact sheet 35 is arranged below the spring sheet 33. A movable contact sheet 331 abutting against the contact sheet 35 is arranged on the spring sheet 33.

[0032] The pressure regulating mechanism is threadedly connected to the fixed panel 31, and the bottom thereof abuts against the spring sheet 33 through the first transmission rod 314 to adjust the sudden displacement of the spring sheet 33;

[0033] The stroke adjustment device 4 abuts against the elastic piece 33 through the second transmission rod 45, and includes a positioning seat 44 and a positioning cover 43 connected by threads. A cylindrical protective sleeve 41 is arranged inside it. A first threaded hole 46 is arranged inside the protective sleeve 41. A pressure spring 42 is sleeved outside the first threaded hole 46. An adjusting screw column 312 is arranged inside the first threaded hole 46. A positioning hole 313 is arranged at one end of the adjusting screw column 312. The top end of the second transmission rod 45 is inserted into the positioning hole 318, and the bottom end extends out of the positioning seat 44 to abut against the elastic piece 33, so as to adjust the gravity value of the pressure switch.

[0034] Preferably, the pressure switch is clamped to the fixed panel 31 through a stud 36. A ceramic tube 10 is sleeved on the stud 36, and the elastic piece 33 is sleeved on the ceramic tube 10. The pressure switch further includes a first magnetic ring 40, a first wiring terminal 34, a second magnetic ring 39, a second wiring terminal 32 and a third magnetic ring 38 sleeved on the ceramic tube 10. A contact piece 35 and a first wiring terminal 34 are sleeved between the first magnetic ring 40 and the second magnetic ring 39. The contact piece 35 is electrically connected to the first wiring terminal 34 by wire. A elastic piece 33 and a second wiring terminal 32 are sleeved between the second magnetic ring 39 and the third magnetic ring 38. The elastic piece 33 is electrically connected to the second wiring terminal 32.

[0035] The pressure adjusting mechanism includes a fixed shaft 310, a first transmission rod 313 and an adjusting screw 311. The fixed shaft 310 is threadedly connected to the fixed panel 31. A second threaded hole is arranged inside the fixed shaft 310. The adjusting screw 311 is threadedly connected to the fixed shaft 310. The first transmission rod 314 is placed inside the second threaded hole and is located at the lower end of the adjusting screw 311. Its bottom surface abuts against the elastic piece 33. The fixed shaft 310 rotates up and down relative to the fixed panel 31, and the adjusting screw 311 rotates up and down relative to the fixed shaft 310.

[0036] The lower end surface of the fixed shaft 310 is provided with an external thread, and the fixed panel 31 is provided with a shaft hole. An internal thread adapted to the external thread is arranged inside the shaft hole, so that the fixed shaft 310 is threadedly connected to the fixed panel 31 and can jump up and down in position, which is convenient for installation and disassembly.

[0037] An annular positioning groove 47 is formed between the first threaded hole 46 and the inner wall of the protective sleeve 41. The pressure spring 42 is inserted into the positioning groove 47. Its top abuts inside the positioning groove 47, and its bottom abuts against the positioning seat 44, driving the protective sleeve 41 to return to its original position.

[0038] The bottom of the stud 36 is provided with an installation groove 19, and the housing is provided with an installation pin 37 adapted to the installation groove 19. The stud 36 is clamped to the installation pin 37 to fix the pressure switch on the housing cover 2.

[0039] Such as Figure 3 、 Figure 4 and Figure 5As shown, the shell cover 2 includes a left shell 1 and a right shell 11 fixed by screws 14, a limiting groove for accommodating the stroke device is formed between the left shell 1 and the right shell 11, and a slot 12 for fixing the stroke adjustment device 4 is provided on the inner wall of the limiting groove.

[0040] Buckles 16 are respectively provided on both sides of the shell cover 2, and holes 15 corresponding to the buckles 16 are respectively provided on the bottom of the shell body. The buckles 16 are snapped into the holes 15 to fix the shell cover 2 to the left shell body 1, which is convenient for installation and disassembly and maintenance.

[0041] The housing cover 2 is provided with lead holes 17 for the lead wires 30 of the first connecting terminal 34 and the second connecting terminal 32 to extend out.

[0042] Both sides of the outer part of the housing are provided with mounting grooves 19, and the housing cover 2 is also provided with fixing holes 18. The housing cover 2 can be fixed in the electrical appliance through the mounting grooves 19, and screws can be tightened through the fixing holes 18 to prevent loosening.

[0043] The working process of the present invention is as follows:

[0044] The abutment between the moving contact piece 33 and the contact piece 35 is controlled according to the stroke adjustment device 4, and the on and off of the first terminal 34 and the second terminal 32 are controlled. When the pressure received by the stroke adjustment device 4 is higher than the predetermined value, the spring piece moves downward, and the moving contact piece 33 abuts against the contact piece 35, so that the first terminal 34 and the second terminal 32 are connected. When the pressure received by the stroke adjustment device 4 is lower than the predetermined value, the moving contact piece 33 and the contact piece 35 are instantly separated to achieve power off.

[0045] Compared with the prior art, the present invention includes a gravity regulating device and a stroke regulating device. The gravity regulating device includes a pressure switch and a pressure regulating mechanism connected to the pressure switch by transmission. The top of the pressure switch is connected to a fixed panel. A spring is provided between the fixed panel and the pressure switch. A contact sheet is provided below the spring sheet. A moving contact sheet abutting against the contact sheet is provided on the spring sheet. The pressure regulating mechanism is threadedly connected to the fixed panel. The bottom abuts against the spring sheet through a first transmission rod to adjust the sudden jump displacement of the spring sheet. The stroke regulating device abuts against the spring sheet through a second transmission rod. It includes a positioning seat and a positioning cover connected by threads. A cylindrical protective sleeve is provided inside the protective sleeve. A threaded hole is provided inside the protective sleeve. A pressure spring is provided outside the threaded hole. An adjusting screw is provided inside the threaded hole. One end of the adjusting screw is provided with a positioning hole. The top end of the second transmission rod is inserted into the positioning hole. The bottom end extends out of the positioning seat to abut against the spring sheet to adjust the on and off of the moving contact sheet and the contact sheet. The power can be cut off very quickly, and it is not affected by time and temperature after the power is cut off. It always keeps the power off state. It is easy to install and improves the service life and safety.

[0046] The present invention is not limited to the above-mentioned optimal embodiments. Anyone should be aware that structural changes made under the inspiration of the present invention, as long as they have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims

1. A gravity switch, comprising a housing and a housing cover snap-fitted to the housing, characterized in that, It further includes: A gravity adjustment device, which is arranged inside the housing and includes a pressure switch and a pressure adjustment mechanism that is drivingly connected to the pressure switch. The top of the pressure switch is connected to a fixed panel. A shrapnel is provided between the fixed panel and the pressure switch. A contact piece is provided below the shrapnel, and a moving contact piece that abuts against the contact piece is provided on the shrapnel; The pressure adjustment mechanism is threadedly connected to the fixed panel and abuts against the shrapnel through a first transmission rod at the bottom to adjust the snap displacement of the shrapnel; A stroke adjustment device, which abuts against the shrapnel through a second transmission rod and includes a positioning seat and a positioning cover that are threadedly connected. A cylindrical protective sleeve is provided inside. A first threaded hole is provided inside the protective sleeve. A pressure spring is sleeved outside the first threaded hole. An adjusting screw column is provided inside the first threaded hole. A positioning hole is provided at one end of the adjusting screw column. The top end of the second transmission rod is inserted into the positioning hole, and the bottom end extends out of the positioning seat and abuts against the shrapnel to adjust the on-off of the moving contact piece and the contact piece; The pressure switch is snap-connected to the fixed panel through a stud. A ceramic tube is sleeved on the stud, and the shrapnel is sleeved on the ceramic tube; An annular positioning groove is formed between the first threaded hole and the inner wall of the protective sleeve, and the pressure spring is inserted into the positioning groove.

2. The gravity switch according to claim 1, characterized in that, The pressure switch further includes a first magnetic ring, a first wiring terminal, a second magnetic ring, a second wiring terminal, and a third magnetic ring that are sleeved on the ceramic tube. The contact piece and the first wiring terminal are sleeved between the first magnetic ring and the second magnetic ring. The contact piece is electrically connected to the first wiring terminal. The shrapnel and the second wiring terminal are sleeved between the second magnetic ring and the third magnetic ring, and the shrapnel is electrically connected to the second wiring terminal.

3. The gravity switch according to claim 1, characterized in that, The pressure adjustment mechanism includes a fixed shaft, a first transmission rod, and an adjusting screw. The fixed shaft is threadedly connected to the fixed panel. A second threaded hole is provided inside the fixed shaft. The adjusting screw is threadedly connected to the fixed shaft. The first transmission rod is placed inside the second threaded hole and is located below the adjusting screw. Its bottom surface abuts against the shrapnel. The fixed shaft rotates up and down relative to the fixed panel, and the adjusting screw rotates up and down relative to the fixed shaft.

4. The gravity switch according to claim 1, wherein An installation groove is provided at the bottom of the stud, and an installation pin adapted to the installation groove is provided on the housing.

5. The gravity switch according to claim 1, wherein The housing includes a left housing and a right housing that are fixed by screws. A limiting groove for accommodating the stroke adjustment device is formed between the left housing and the right housing. A clamping groove for fixing the stroke adjustment device is provided on the inner wall of the limiting groove.

6. The gravity switch according to claim 1, characterized in that, Clasps are respectively provided on both sides of the housing cover, and corresponding card holes are respectively provided at the bottom of the housing.

7. The gravity switch according to claim 2, wherein Lead holes for the leads of the first wiring terminal and the second wiring terminal to extend out are respectively provided on the housing cover.

8. The gravity switch according to claim 1, wherein Installation grooves are respectively provided on both sides of the outside of the housing, and fixing holes are further provided on the housing cover.

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