Pressure switch structure with high trigger sensitivity

Abstract

The utility model provides a pressure switch structure with high trigger sensitivity. The oil pump comprises a shell, an insulator, a metal conducting strip, a reset spring, a rubber diaphragm and a metal inserting piece, a pipe connecting bolt is arranged at one end of the shell, an oil inlet hole and an oil outlet hole are formed in the pipe connecting bolt, a center transition cavity is formed in the shell, the oil inlet hole and the oil outlet hole are both communicated with the center transition cavity, and the metal inserting piece is installed in the insulator. One end of the metal inserting piece extends into the center transition cavity, the metal conducting piece and the rubber diaphragm are both arranged in the metal transition cavity, the metal conducting piece is located between the rubber diaphragm and the metal conducting piece, and the reset spring is used for pushing the metal conducting piece to be separated from the end of the metal inserting piece. The rubber diaphragm comprises a disc-shaped central diaphragm and an annular peripheral diaphragm, the central diaphragm is integrally formed on the peripheral diaphragm, the thickness of the peripheral diaphragm is greater than that of the central diaphragm, and the peripheral diaphragm is extruded and fixed on the cavity wall of the central transition cavity by the end part of the insulator. The pressure switch with the rubber diaphragm has the effects of long service life and high trigger sensitivity.

Description

Technical Field

[0001] The utility model relates to a pressure switch, in particular to a pressure switch structure with high trigger sensitivity. Background Art

[0002] The existing pressure switch structure is as shown in the attached patent application Figure 1 As shown, it includes a shell a, one end of the shell a is provided with a connecting bolt b, an oil inlet hole c and an oil outlet hole d are provided in the connecting bolt b, a cavity e is provided inside the shell a, an insulator f is provided in the cavity e, a central transition cavity g is provided between the insulator f and the oil inlet hole c, two metal plugs h are inserted in the insulator f, one end of each metal plug h protrudes from the outside, and the other end protrudes from the central transition cavity g, a metal conductive sheet i and a rubber diaphragm j are sequentially provided along the side away from the metal plug h in the central transition cavity g, a reset spring k is provided on the side wall of the insulator f close to the central transition cavity g, when hydraulic oil does not enter the oil inlet hole c, the rubber diaphragm j is not squeezed by the hydraulic oil, the reset spring k pushes the metal sheet i to the side away from the metal plug h, and the metal conductive sheet i is separated from the two metal plugs h; when hydraulic oil enters the oil inlet hole c, the hydraulic oil produces an extrusion deformation on the rubber diaphragm j, and the rubber diaphragm j pushes the metal conductive sheet i to the side of the metal plug h, thereby making the two metal plugs h conductive.

[0003] According to the current regulations of the pressure switch industry, when the hydraulic oil pressure reaches 0.2Mpa-0.6Mpa, the light should be turned on, that is, the metal conductive sheet i should be pushed to the position where it contacts the two metal inserts h. At this time, the structure of the rubber diaphragm j must meet the dual requirements of long service life and deformation sensitivity. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a high trigger sensitivity pressure switch structure, which has the effects of long service life and high trigger sensitivity.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A high trigger sensitivity pressure switch structure comprises a shell, an insulator, a metal conductive sheet, a reset spring, a rubber diaphragm and a metal insert. A connecting bolt is provided at one end of the shell, an oil inlet hole and an oil outlet hole are provided on the connecting bolt, a central transition cavity is provided in the shell, both the oil inlet hole and the oil outlet hole are communicated with the central transition cavity, the metal insert is installed in the insulator, one end of the metal insert extends into the central transition cavity, the metal conductive sheet and the rubber diaphragm are both arranged in the central transition cavity, the metal conductive sheet is located between the rubber diaphragm and the metal conductive sheet, the reset spring is used to push the metal conductive sheet to separate from the end of the metal insert, the rubber diaphragm comprises a disc-shaped central diaphragm and an annular peripheral diaphragm, the central diaphragm is integrally formed with the peripheral diaphragm, the thickness of the peripheral diaphragm is greater than the thickness of the central diaphragm, and the end of the insulator squeezes and fixes the peripheral diaphragm on the cavity wall of the central transition cavity.

[0007] Through the above technical solution, firstly, the thickness of the central diaphragm is thinned. When the hydraulic oil generates a squeezing force on the central diaphragm, the central diaphragm can deform more sensitively, thereby pushing the metal conductive sheet to move, and the metal conductive sheet will contact the end of the metal plug to conduct electricity; secondly, the thickness of the peripheral diaphragm is thickened, and the peripheral diaphragm will be squeezed between the end of the insulator and the step surface, so the fixing stability is higher, and the connection stability between the central diaphragm and the peripheral diaphragm is also higher; the pressure switch with the above rubber diaphragm has the effects of long service life and high trigger sensitivity.

[0008] Preferably, the thickness of the central diaphragm is between 0.8 mm and 0.9 mm.

[0009] Through the above technical solution, the central diaphragm is controlled within the above size range, taking into account the service life and deformation sensitivity of the central diaphragm, so that it can meet the actual use requirements of lighting when the oil pressure of the hydraulic oil reaches 0.2Mpa-0.6Mpa.

[0010] Preferably, the thickness of the peripheral diaphragm is between 1.4 mm and 1.6 mm.

[0011] By using the above technical solution, the peripheral diaphragm is controlled within the above size range, which can effectively improve the installation stability of the peripheral diaphragm.

[0012] Preferably, a step surface is provided on the cavity wall of the central transition cavity, and a mounting groove is provided on the step surface, and the peripheral diaphragm can enter into the mounting groove.

[0013] Through the above technical solution, when the peripheral diaphragm of the rubber diaphragm is squeezed into the installation groove, the installation stability of the entire rubber diaphragm is effectively improved.

[0014] Preferably, a mounting protrusion is provided at the end of the insulator close to the central transition cavity, the mounting protrusion abuts against the peripheral diaphragm, and the thickness of the mounting protrusion is less than or equal to the groove width of the mounting groove.

[0015] Through the above technical solution, the mounting protrusion can push the peripheral diaphragm into the mounting groove more easily, further improving the installation stability of the rubber diaphragm.

[0016] Preferably, a circular arc surface is provided at the notch of the installation groove, and the circular arc surface is used to abut against the central diaphragm.

[0017] Through the above technical solution, during the deformation of the central diaphragm, the side wall of the central diaphragm will inevitably come into contact with the notch of the installation groove. The arc surface can make the extrusion surface of the central diaphragm produced by the notch of the installation groove an arc surface, thereby improving the actual service life of the central diaphragm.

[0018] Preferably, the two side walls of the peripheral diaphragm are respectively the first side wall and the second side wall, and the two side walls of the central diaphragm are respectively the third side wall and the fourth side wall, the first side wall is flush with the third side wall, the second side wall protrudes from the fourth side wall, the first side wall and the third side wall are both installed toward one side of the mounting groove, and the second side wall and the fourth side wall are both installed toward one side of the insulator.

[0019] Through the above technical solution, when the hydraulic oil enters the central transition chamber from the oil inlet hole, the hydraulic oil will contact the third side wall, and the entire central diaphragm will be deformed toward the insulator side. At this time, the first side wall is flush with the third side wall, the rubber diaphragm has better integrity on this side wall, and it is not easy for the peripheral diaphragm and the central diaphragm to be damaged.

[0020] Preferably, a mounting protrusion is provided at the end of the insulator close to the central transition cavity, and the thickness of the mounting protrusion is greater than the width of the peripheral diaphragm.

[0021] Through the above technical solution, since the thickness of the mounting protrusion is greater than the width of the surrounding diaphragm, the side of the mounting protrusion will extend to the side close to the center diaphragm. When the center diaphragm is deformed toward the insulator, the part of the side wall of the center diaphragm close to the insulator will be against the side of the mounting protrusion, which is beneficial to slow down the transition deformation of the center diaphragm and extend its service life.

[0022] Preferably, the two side walls of the peripheral diaphragm are respectively the first side wall and the second side wall, the two side walls of the central diaphragm are respectively the third side wall and the fourth side wall, the first side wall is flush with the third side wall, the second side wall protrudes from the fourth side wall, the first side wall and the third side wall are both installed toward the side of the insulator, and the second side wall and the fourth side wall are both installed toward the side of the mounting groove.

[0023] Through the above technical solution, on the one hand, the side of the peripheral diaphragm protruding from the central diaphragm can be more easily inserted into the installation groove, and the installation stability is high; on the other hand, since the first side wall and the third side wall are both installed toward the side of the insulator, the first side wall and the third side wall are flush with each other, and the installation protrusion can simultaneously resist the peripheral diaphragm and the central diaphragm, thereby improving the stability of use.

[0024] Preferably, a rough layer is provided at the end of the mounting protrusion, the rough layer abuts against the rubber diaphragm, and the rough layer is opposite to the notch edge of the mounting groove.

[0025] Through the above technical solution, the rough layer can increase the contact friction between the mounting protrusion and the rubber diaphragm, and the rough layer can be opposite to the notch of the mounting groove, that is, the mounting protrusion will be clamped between the rough layer and the notch of the mounting groove, which can ultimately effectively improve the installation stability of the rubber diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 For the existing pressure switch structure;

[0027] Figure 2 It is a cross-sectional structural schematic diagram of embodiment 1;

[0028] Figure 3 for Figure 2 A magnified view of part A;

[0029] Figure 4 It is a cross-sectional structural schematic diagram of the second embodiment;

[0030] Figure 5 for Figure 4 Enlarged view of part B.

[0031] Figure numerals: a, housing; b, connecting bolt; c, oil inlet hole; d, oil outlet hole; e, cavity; f, insulator; g, central transition cavity; h, metal insert; i, metal conductive sheet; j, rubber diaphragm; k, reset spring; 1, central diaphragm; 2, peripheral diaphragm; 3, step surface; 4, mounting groove; 5, mounting protrusion; 6, arc surface; 7, first side wall; 8, second side wall; 9, third side wall; 10, fourth side wall; 11, rough layer. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0033] Example 1: See Figure 1-Figure 2 shown.

[0034] A high trigger sensitivity pressure switch structure comprises a shell a, an insulator f, a metal conductive sheet i, a reset spring k, a rubber diaphragm j, and a metal insert h.

[0035] One end of the housing a is provided with a connecting bolt b, and the connecting bolt b is provided with an oil inlet hole c and an oil outlet hole d. A central transition cavity g is provided inside the housing a, and both the oil inlet hole c and the oil outlet hole d are connected to the central transition cavity g; the hydraulic oil enters the central transition cavity g through the oil inlet hole c.

[0036] The metal insert h is provided with two pieces, and the metal insert h is installed in the insulator f, and one end of the metal insert h extends into the central transition cavity g.

[0037] The metal conductive sheet i and the rubber diaphragm j are both disposed in the central transition cavity g, and the metal conductive sheet i is located between the rubber diaphragm j and the metal conductive sheet i.

[0038] One end of the return spring k abuts against the insulator f, and the other end of the return spring k abuts against the central conductive sheet. The return spring k is used to push the metal conductive sheet i to separate from the end of the metal insert h.

[0039] The rubber diaphragm j includes a disc-shaped central diaphragm 1 and a circular peripheral diaphragm 2, wherein the central diaphragm 1 is integrally formed with the peripheral diaphragm 2. The thickness of the peripheral diaphragm 2 is greater than that of the central diaphragm 1, and the end of the insulator f squeezes and fixes the peripheral diaphragm 2 on the cavity wall of the central transition cavity g. The thickness of the central diaphragm 1 is between 0.8 mm and 0.9 mm; according to actual test results, the thickness of the central diaphragm 1 is preferably 0.7 mm. The thickness of the peripheral diaphragm 2 is between 1.4 mm and 1.6 mm, and according to actual test results, the thickness of the peripheral diaphragm 2 is preferably 1.5 mm.

[0040] A step surface 3 is provided on the cavity wall of the central transition cavity g, and a mounting groove 4 is provided on the step surface 3 . The peripheral diaphragm 2 can enter into the mounting groove 4 .

[0041] A mounting protrusion 5 is provided at the end of the insulator f close to the central transition cavity g, and the mounting protrusion 5 abuts against the peripheral diaphragm 2 .

[0042] See also Figure 3 As shown, the thickness of the mounting protrusion 5 is L. The width of the mounting groove 4 is M, and the thickness L of the mounting protrusion 5 is less than or equal to the width M of the mounting groove 4 .

[0043] A circular arc surface 6 is provided at the notch of the installation groove 4 , and the circular arc surface 6 is used to abut against the central diaphragm 1 .

[0044] The two side walls of the peripheral diaphragm 2 are respectively the first side wall 7 and the second side wall 8, the two side walls of the central diaphragm 1 are respectively the third side wall 9 and the fourth side wall 10, the first side wall 7 is flush with the third side wall 9, the second side wall 8 protrudes from the fourth side wall 10, the first side wall 7 and the third side wall 9 are both installed toward the side of the mounting groove 4, and the second side wall 8 and the fourth side wall 10 are both installed toward the side of the insulator f.

[0045] Example 2: See Figure 3 as well as Figure 4 As shown, the difference from the first embodiment is that:

[0046] See also Figure 4 As shown, a mounting protrusion 5 is provided at the end of the insulator f close to the central transition cavity g, and the thickness of the mounting protrusion 5 is L. The width of the peripheral diaphragm 2 is N, and the thickness L of the mounting protrusion 5 is greater than the width N of the peripheral diaphragm 2 .

[0047] The two side walls of the peripheral diaphragm 2 are respectively the first side wall 7 and the second side wall 8, the two side walls of the central diaphragm 1 are respectively the third side wall 9 and the fourth side wall 10, the first side wall 7 is flush with the third side wall 9, the second side wall 8 protrudes from the fourth side wall 10, the first side wall 7 and the third side wall 9 are both installed toward the side of the insulator f, and the second side wall 8 and the fourth side wall 10 are both installed toward the side of the mounting groove 4.

[0048] The end of the mounting protrusion 5 is provided with a rough layer 11, which can be understood as a plurality of ribs provided at the end of the mounting protrusion 5. The rough layer 11 abuts against the rubber diaphragm j, and the rough layer 11 is opposite to the notch edge of the mounting groove 4.

[0049] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A high trigger sensitivity pressure switch structure, comprising a housing (a), an insulator (f), a metal conductive sheet (i), a reset spring (k), a rubber diaphragm (j), and a metal insert (h), wherein one end of the housing (a) is provided with a connecting bolt (b), and the connecting bolt (b) is provided with an oil inlet hole (c) and an oil outlet hole (d), a central transition cavity (g) is provided in the housing (a), and both the oil inlet hole (c) and the oil outlet hole (d) are connected to the central transition cavity (g), the metal insert (h) is installed in the insulator (f), one end of the metal insert (h) extends into the central transition cavity (g), the metal conductive sheet (i) and the rubber diaphragm (j) are both arranged in the central transition cavity (g), the metal conductive sheet (i) is located between the rubber diaphragm (j) and the metal conductive sheet (i), and the reset spring (k) is used to push the metal conductive sheet (i) and the end of the metal insert (h) to separate, wherein: The rubber diaphragm (j) comprises a disc-shaped central diaphragm (1) and a circular ring-shaped peripheral diaphragm (2); the central diaphragm (1) is integrally formed with the peripheral diaphragm (2); the thickness of the peripheral diaphragm (2) is greater than the thickness of the central diaphragm (1); and the end of the insulator (f) squeezes and fixes the peripheral diaphragm (2) on the cavity wall of the central transition cavity (g).

2. A high trigger sensitivity pressure switch structure according to claim 1, characterized in that: The thickness of the central diaphragm (1) is between 0.8 mm and 0.9 mm.

3. The high trigger sensitivity pressure switch structure according to claim 1 is characterized in that: The thickness of the peripheral diaphragm (2) is between 1.4 mm and 1.6 mm.

4. A high trigger sensitivity pressure switch structure according to any one of claims 1 to 3, characterized in that: A step surface (3) is provided on the cavity wall of the central transition cavity (g), and a mounting groove (4) is provided on the step surface (3), and the peripheral diaphragm (2) can enter the mounting groove (4).

5. A high trigger sensitivity pressure switch structure according to claim 4, characterized in that: The insulator (f) is provided with a mounting protrusion (5) at the end close to the central transition cavity (g), the mounting protrusion (5) abuts against the peripheral diaphragm (2), and the thickness of the mounting protrusion (5) is less than or equal to the groove width of the mounting groove (4).

6. A high trigger sensitivity pressure switch structure according to claim 4, characterized in that: A circular arc surface (6) is provided at the notch of the installation groove (4), and the circular arc surface (6) is used to abut against the central diaphragm (1).

7. A high trigger sensitivity pressure switch structure according to claim 4, characterized in that: The two side walls of the peripheral diaphragm (2) are respectively the first side wall (7) and the second side wall (8); the two side walls of the central diaphragm (1) are respectively the third side wall (9) and the fourth side wall (10); the first side wall (7) is flush with the third side wall (9); the second side wall (8) protrudes from the fourth side wall (10); the first side wall (7) and the third side wall (9) are both installed toward one side of the mounting groove (4); and the second side wall (8) and the fourth side wall (10) are both installed toward one side of the insulator (f).

8. The high trigger sensitivity pressure switch structure according to claim 4 is characterized in that: The insulator (f) is provided with a mounting protrusion (5) at the end close to the central transition cavity (g), and the thickness of the mounting protrusion (5) is greater than the width of the peripheral diaphragm (2).

9. A high trigger sensitivity pressure switch structure according to claim 8, characterized in that: The two side walls of the peripheral diaphragm (2) are respectively the first side wall (7) and the second side wall (8); the two side walls of the central diaphragm (1) are respectively the third side wall (9) and the fourth side wall (10); the first side wall (7) is flush with the third side wall (9); the second side wall (8) protrudes from the fourth side wall (10); the first side wall (7) and the third side wall (9) are both installed toward the side of the insulator (f); and the second side wall (8) and the fourth side wall (10) are both installed toward the side of the mounting groove (4).

10. A high trigger sensitivity pressure switch structure according to claim 9, characterized in that: The end of the mounting protrusion (5) is provided with a rough layer (11), the rough layer (11) abuts against the rubber diaphragm (j), and the rough layer (11) is opposite to the notch edge of the mounting groove (4).

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