Push switch

Abstract

To provide a push switch in which poor contact at a terminal or voids in a filling body are suppressed.SOLUTION: A push switch 2 according to one embodiment includes a body that is hollow inside and has a depression 34 on its surface, a pair of holes 32 that open into the depression 34, a pair of terminals 18 that pass through each of the pair of holes 32, a pressing bar 6 that is exposed from the body and switches between conduction and cut-off between the pair of terminals 18, and a filling body 20 that is a hardened fluid filling agent. The filling body 20 is filled into the depression 34 so as to cover the portion of the terminal 18 exposed on the side of the depression 34. This push switch 2 includes an obstruction mechanism that prevents the fluid filling agent or the air in the cavity from passing through the hole 32.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] This specification discloses a push switch. [Background technology]

[0002] Push switches are used in vehicle transmissions to detect modes such as neutral, reverse, etc. The push switch is attached to the transmission case by screwing it into a screw hole that penetrates from the outside to the inside of the transmission case, and a part of the push switch is exposed inside the transmission case.

[0003] A typical push switch has a main body, a push button movable relative to the main body, and a pair of terminals. A part of the push button is exposed inside the transmission case. One end of each terminal is located inside the main body, and the other end is exposed from the main body to the outside of the transmission case. When the driver operates the vehicle to be in neutral, reverse, or other mode, the push button is pressed inside the transmission case. This causes a switch mechanism provided inside the main body to establish electrical continuity between the pair of terminals inside the main body, turning the switch on. When the force pressing the push button is removed, the continuity between the pair of terminals is lost, turning the switch off. A study on a switch for a vehicle stop lamp is disclosed in Japanese Utility Model Application Laid-Open No. 59-77726. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 59-77726 Summary of the Invention [Problem to be solved by the invention]

[0005] In assembling a push switch, first, a main body including a push button and a switch mechanism is assembled. A recess is provided on the top surface of the main body, and a pair of holes with openings are provided in this recess. A pair of terminals are attached to the main body by inserting each of them into the corresponding hole. Lead wires are attached to the terminals, and then a fluid filler is filled into the recess so as to cover the exposed parts of the terminals. The fluid filler hardens, for example, by heat treatment, to become a filler. This completes the push switch.

[0006] If the cross-sectional contour of the hole and the cross-sectional contour of the terminal are made equal in size, friction between the inner wall of the hole and the terminal increases when the terminal is inserted into the hole. The force required to insert the terminal (insertion force) increases, making it difficult to attach the terminal to the main body. In order to prevent the insertion force from becoming too large, it is possible to form the hole so that the cross-sectional contour of the hole is slightly larger than the cross-sectional contour of the terminal. However, in this case, when the terminal is inserted into the hole, a gap exists between the hole and the terminal. When the fluid filler is filled into the recess, the filler may pass through the gap and flow out into the main body. The filler that has flowed into the main body may cover the terminal surface at the contact portion of the terminal, causing poor contact. In addition, the high temperature fluid filler causes the air inside the main body to expand, and this air enters the fluid filler through the gap. This causes voids in the filler. The voids are one of the causes of poor appearance and further reduce the airtightness between the inside and outside of the main body, which leads to leakage of transmission oil when the push switch is used in a vehicle transmission.

[0007] An object of the present invention is to provide a push switch in which poor contact at the terminals or voids in the filler are suppressed. [Means for solving the problem]

[0008] A push switch according to one embodiment includes a body having a hollow interior and a depression on a surface, a pair of holes having openings in the depression, a pair of terminals penetrating through each of the pair of holes, a pressing bar exposed from the body for switching between conduction and cutoff between the pair of terminals, and a filling body made of hardened fluid filling material. The filling body is filled into the depression so as to cover the exposed portion of the terminal on the side of the depression. This push switch includes an obstruction mechanism that prevents the fluid filling material or air in the cavity from passing through the hole. Effect of the Invention

[0009] The push switch includes an obstruction mechanism that prevents the fluid filler and air in the cavity from passing through the hole. In the push switch, the fluid filler is prevented from flowing into the body. Air in the body is prevented from entering the fluid filler. In the push switch, contact failure at the terminals and voids in the filler are suppressed. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view showing a push switch according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the push switch of FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] 4(a) is a plan view of the terminal holder of FIG. 2, and FIG. 4(b) is a cross-sectional view taken along line IVb-IVb of FIG. 4(a). [Diagram 5] FIG. 5 is a perspective view showing the terminal of FIG. [Figure 6] 6(a) is a cross-sectional view in which a part of FIG. 3 is enlarged, and FIG. 6(b) is a cross-sectional view in which a part of FIG. 6(a) is enlarged. [Figure 7] FIG. 7 is an enlarged cross-sectional view of a portion of a push switch according to another embodiment. [Figure 8]FIG. 8(a) is a cross-sectional view showing a terminal and a part of a terminal holder of a push switch according to still another embodiment, and FIG. 8(b) is a side view showing the terminal of FIG. 8(a). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, preferred embodiments will be described in detail with reference to the drawings as appropriate.

[0012] FIG. 1 is a perspective view showing a push switch 2 according to an embodiment. The push switch 2 can be used in a vehicle transmission. In FIG. 1, an arrow X indicates the front of the push switch 2. The opposite is the rear. An arrow Y indicates the right direction of the push switch 2. The opposite is the left direction. An arrow Z indicates the upper side of the push switch 2. The opposite is the downward direction. FIG. 2 is an exploded perspective view of the push switch 2 in FIG. 1. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. As shown in FIG. 1, the push switch 2 includes a body 4, a terminal holder 14, a pressing bar 6, a pair of terminals 18, and a filling body 20. The body 4 and the terminal holder 14 constitute the main body of the push switch 2. As shown in FIGS. 2 and 3, the push switch 2 further includes a conductor 8, a spring base 10, and a spring 12. In FIGS. 1 and 2, a lead wire 22 connected to the push switch 2 is also shown. In FIG. 2, the filling body 20 is omitted.

[0013] The body 4 is generally cylindrical. The body 4 has a cavity inside. In this embodiment, the body 4 includes an upper portion 4a and a lower portion 4b. As can be seen from FIG. 2, in a plan view, the upper portion 4a is generally hexagonal, and the lower portion 4b is generally circular. A screw thread used when attaching the push switch 2 to a transmission may be formed on the side surface of the lower portion 4b. The upper surface of the body 4 is open. The body 4 has an opening 16 on the upper side. As shown in FIG. 3, the body 4 also has an opening on the lower side. The body 4 is typically made of metal. A preferred material for the body 4 is carbon steel. The material for the body 4 may be stainless steel. The material for the body 4 may be a resin composition.

[0014] The pressing bar 6 is located inside the lower part 4b of the body 4. As shown in FIG. 3, the pressing bar 6 penetrates the lower part 4b. As shown in FIGS. 1 and 3, the tip of the pressing bar 6 is exposed from the opening on the lower side of the body 4. The pressing bar 6 is not fixed to the body 4. The pressing bar 6 is movable with respect to the body 4. The pressing bar 6 is typically made of a resin composition or a metal. Preferable materials for the pressing bar 6 include oil-resistant resins such as nylon 66 as a resin composition and carbon steel as a metal. When the pressing bar 6 is made of a metal, an insulator for insulating the pressing bar 6 from the conductor 8 is provided between the pressing bar 6 and the conductor 8.

[0015] The conductor 8 is located at the upper end of the pressure bar 6. As shown in FIG. 2, the conductor 8 has a base 8a and a pair of wings 8b. The base 8a is ring-shaped. Each wing 8b extends upward from the base 8a. The base 8a and the wings 8b are integrally formed. The conductor 8 has a leaf spring structure in which the wings 8b are bent relative to the base 8a. The conductor 8 is conductive. Stainless steel is an example of a preferred material for the conductor 8. The conductor 8 may also be made of copper or an aluminum alloy. In this specification, a substance is said to be "conductive" when the electrical conductivity of the substance is 10 6This refers to a resistance of more than S / m. Here, "S" stands for the reciprocal of resistance "Ω (ohm)" (Siemens) and "m" stands for distance (meters).

[0016] The spring rest 10 is located on the base 8a of the conductor 8. The spring rest 10 is located between a pair of wings 8b. The spring rest 10 is cylindrical. The spring rest 10 is typically made of a resin composition. A preferred material for the spring rest 10 is an oil-resistant resin such as nylon 66.

[0017] The pressing bar 6, the conductor 8, and the spring base 10 are fixed to each other. For example, when the pressing bar 6 is pushed from the outside and moves relative to the body 4, the conductor 8 and the spring base 10 also move. Here, the pressing bar 6, the conductor 8, and the spring base 10 are collectively referred to as a "pressing unit 24." The pressing unit 24 is shown in FIG. 2.

[0018] As shown in Fig. 3, the spring base 10 is fitted into the lower end portion of the spring 12. A spring receiver 30 of a terminal holder 14 (described later) is fitted into the upper end portion of the spring 12. The spring 12 maintains the spring base 10 and the terminal holder 14 at a predetermined distance. As a result, as shown in Fig. 3, the conductor 8 and the pair of terminals 18 are spaced apart. The conductor 8 and the pair of terminals 18 are not in contact with each other.

[0019] FIG. 4(a) is a plan view showing the terminal holder 14, and FIG. 4(b) is a cross-sectional view taken along line IVb-IVb in FIG. 4(a). The terminal holder 14 is generally cylindrical. The terminal holder 14 is typically made of a resin composition. A preferred material for the terminal holder 14 is PBT (polybutylene terephthalate). The material for the terminal holder 14 may be PPS (polyphenylene sulfide) and PET (polyethylene terephthalate). The terminal holder 14 includes a fitting portion 26, a lid portion 28, and a spring receiver 30. The lid portion 28 is provided with a pair of holes 32.

[0020] The fitting portion 26 is cylindrical. The fitting portion 26 has a cavity therein. The outer diameter of the fitting portion 26 is approximately equal to the inner diameter of the upper portion 4a of the body 4 or slightly smaller than the inner diameter of the upper portion 4a. As shown in FIG. 3, the fitting portion 26 is fitted into the upper portion 4a of the body 4 from above and is crimped at the upper end of the body 4. In this way, the terminal holder 14 is fixed to the body 4.

[0021] The lid portion 28 is located above the fitting portion 26. The lid portion 28 and the fitting portion 26 together close the upper opening 16 of the body 4. As shown in Figs. 2 and 4(b), the lid portion 28 has a recess 34 on its upper surface. In this embodiment, the lid portion 28 has a recess on its upper surface except for the arched portion 36. In other words, in a plan view, the recess 34 has a shape obtained by removing the arched portion 36 from a circle. As shown in Figs. 4(a) and (b), the arched portion 36 is provided with a pair of lead-out holes 38 through which the lead wires 22 pass. In this embodiment, the lid portion 28 is formed integrally with the fitting portion 26.

[0022] The spring support 30 protrudes downward from the cover portion 28. The spring support 30 is cylindrical. As shown in Fig. 3, the spring support 30 is fitted onto the upper end of the spring 12. In this embodiment, the spring support 30 is integrally formed with the cover portion 28.

[0023] As shown in Fig. 4(b), each of the pair of holes 32 penetrates the cover portion 28. As shown in Fig. 4(a), the opening of each hole 32 is located in a recess 34. These openings are rectangular in shape. In Fig. 4(a), the double-headed arrow W indicates the width of the hole 32, and the double-headed arrow L indicates the length of the hole 32.

[0024] FIG. 5 is a perspective view showing a pair of terminals 18. In this embodiment, one terminal 18 is the other terminal 18 rotated 180° around the Z axis, and they have substantially the same shape. The terminal 18 includes a contact portion 18a extending in the vertical direction and a grip portion 18b extending in the horizontal direction from the upper end of the contact portion 18a. The contact portion 18a has a long and thin flat plate shape. As shown in FIG. 3, the contact portion 18a passes through the hole 32. The lower end of the contact portion 18a extends to the cavity of the body 4. The grip portion 18b is exposed on the side of the recess 34 of the cover portion 28. The grip portion 18b includes a slit 40 extending downward from the upper end. As shown in FIG. 3, the lead wire 22 is passed through this slit 40. The lead wire 22 is gripped by the slit 40. In this embodiment, the contact portion 18a and the grip portion 18b are formed as a single unit. The terminal 18 is conductive. Preferable materials for the terminal 18 include copper and brass.

[0025] FIG. 6(a) is an enlarged cross-sectional view of the periphery of the terminal 18, and FIG. 6(b) is a further enlarged cross-sectional view of the region R in FIG. 6(a). As shown in the figure, the width W of the hole 32 is slightly larger than the thickness of the contact portion 18a. Therefore, a gap exists between the inner wall 42 of the hole 32 and the contact portion 18a. In this embodiment, the contact portion 18a contacts the inner wall 42 on the outside of the hole 32 (the outside in the radial direction of the lid portion 28) and is separated from the inner wall 42 on the inside of the hole 32 (the inside in the radial direction of the lid portion 28). Although not shown, the length L of the hole 32 is slightly larger than the width of the contact portion 18a.

[0026] As shown in FIG. 6(b), a protrusion 44 is provided on the inner wall 42 of the hole 32. The protrusion 44 protrudes toward the contact portion 18a. An upper surface 46 of the protrusion 44 is inclined downward toward the inside of the hole 32. As shown in FIG. 4(a), the protrusion 44 extends in the length direction of the hole 32. As shown in FIG. 6(b), the gap is narrower at the position where the protrusion 44 is present than at the position where the protrusion 44 is not present. In this embodiment, the protrusion 44 is located at the lower end of the inner wall 42 of the hole 32. The position of the protrusion 44 does not have to be the lower end of the inner wall 42 of the hole 32. The position of the protrusion 44 may be the center or the upper end of the inner wall 42 of the hole 32.

[0027] The filler 20 is filled in the recess 34 of the lid portion 28. As shown in FIG. 3, the filler 20 covers the gripping portion 18b of the terminal 18. Therefore, as shown in FIG. 1, the terminal 18 is not exposed to the outside. The filler 20 is formed by hardening a fluid filler. In this embodiment, the filler 20 is made of a thermosetting resin. A resin that hardens at room temperature may be used as the filler 20. An example of a preferred filler 20 is an epoxy resin.

[0028] In this push switch 2, the on / off state is switched as follows. In the state shown in FIG. 3, the push switch 2 is off. When an upward force is applied to the tip of the pressing bar 6, an upward force is applied to the spring 12 via the spring base 10. The spring 12 is compressed, and the pressing unit 24 moves upward. When the conductor 8 moves upward from the state shown in FIG. 3, each wing 8b comes into contact with the corresponding terminal 18. The pair of terminals 18 both come into contact with the conductor 8. As a result, the pair of terminals 18 are electrically connected to each other, and the push switch 2 is turned on. When the force applied to the tip of the pressing bar 6 is removed, the pressing unit 24 is pushed back downward by the spring 12. As shown in FIG. 3, the wing 8b and the terminal 18 are separated. The electrical connection between the pair of terminals 18 is interrupted, and the push switch 2 returns to the off state. The pressure bar 6 functions as a “push button” for switching between electrical continuity and interruption between a pair of terminals 18 .

[0029] In assembling the push switch 2, the pressing bar 6, the conductor 8, and the spring base 10 are combined to prepare the pressing unit 24. Furthermore, the body 4, the spring 12, the terminal holder 14, the terminal 18, and the lead wire 22 are prepared. As shown in FIG. 2, the pressing unit 24 is inserted into the body 4 through the opening 16 of the body 4 (S1), and then the spring 12 is attached to the spring base 10 (S2). The terminal holder 14 is fitted into the body 4 (S3), and each of the pair of terminals 18 is inserted into the corresponding hole 32 (S4). The lead wire 22 is passed through the slit 40 of the gripping portion 18b of the terminal 18 (S5). Although not shown, a fluid filler is poured into the recess 34 of the cover portion 28 to fill the recess 34. In this embodiment, the fluid filler is hardened by heating, and the filler 20 is formed. This completes the assembly of the push switch 2.

[0030] The effects of this embodiment will be described below.

[0031] In this push switch 2, a protrusion 44 is provided on the inner wall 42 of the hole 32. When the fluid filler is poured into the recess 34, the protrusion 44 prevents the fluid filler from passing through the hole 32 and flowing into the body 4. In this push switch 2, poor contact between the terminal 18 and the conductor 8 is prevented, which would occur if the fluid filler that has flowed into the body 4 covers the surface of the terminal 18. The protrusion 44 prevents air inside the body 4 from passing through the hole 32 and entering the fluid filler. In this push switch 2, voids in the filler 20 are suppressed. The protrusion 44 functions as an obstruction mechanism that prevents the fluid filler and the air in the cavity from passing through the hole 32.

[0032] In this push switch 2, the gap between the inner wall 42 of the hole 32 and the terminal 18 is narrow only at the portion where the protrusion 44 is present. When the terminal 18 is inserted into the hole 32, friction between the inner wall 42 of the hole 32 and the terminal 18 is small. This prevents the force (insertion force) required to insert the terminal 18 into the hole 32 from becoming large. With this push switch 2, easy assembly is achieved.

[0033] In FIG. 6(b), the double-headed arrow D indicates the minimum distance between the protrusion 44 and the terminal 18. The distance D is the minimum distance between the protrusion 44 and the terminal 18 measured in a direction perpendicular to the surface of the terminal 18 facing the inner wall 42. The distance D is preferably 0.1 mm or less. By setting the distance D to 0.1 mm or less, the protrusion 44 effectively prevents the fluid filler and the air in the cavity from passing through the hole 32. From this viewpoint, the distance D is more preferably 0.05 mm or less.

[0034] 7 is a cross-sectional view showing a portion of a terminal holder 52 and a terminal 54 of a push switch according to another embodiment. This drawing shows an enlarged view of the vicinity of a hole 56. This push switch is the same as the push switch 2 in FIG. 1 except for the terminal holder 52.

[0035] As shown in Fig. 7, a protrusion 60 is provided on an inner wall 58 of the hole 56. The protrusion 60 has a lip shape that protrudes toward the terminal 54. The protrusion 60 has a low rigidity and a deformable shape. In this embodiment, the protrusion 60 extends inward while inclining downward. In this embodiment, the protrusion 60 is in contact with the terminal 54.

[0036] In FIG. 7, the dotted line indicates the outline of the protrusion 60 when the terminal 54 is not inserted. When the terminal 54 is not inserted, the downward inclination of the protrusion 60 is smaller than when the terminal 54 is inserted. The protrusion 60 extends in a direction closer to horizontal than when the terminal 54 is inserted. That is, when the terminal 54 is inserted and the terminal 54 moves downward from above the hole 56, the lower end of the terminal 54 comes into contact with the protrusion 60. When the terminal 54 further moves downward, the protrusion 60 elastically deforms downward. As a result of this deformation, the protrusion 60 assumes the shape shown by the solid line in FIG. 7.

[0037] In this push switch, a protrusion 60 is provided on the inner wall 58 of the hole 56. This protrusion 60 is in contact with the terminal 54. The gap of the hole 56 is blocked by this protrusion 60. When the fluid filler is poured into the recess 34, the protrusion 60 prevents the fluid filler from passing through the hole 56 and flowing into the body 4. In this push switch, poor contact at the terminal 54 due to a shortage of the filler 20 is prevented. This protrusion 60 prevents air inside the body 4 from passing through the hole 56 and entering the fluid filler. In this push switch, voids in the filler 20 are suppressed. This protrusion 60 functions as an obstruction mechanism that prevents the fluid filler and the air in the cavity from passing through the hole 56.

[0038] In this push switch, the protrusion 60 extends inward while inclining downward. By adjusting the thickness of this protrusion 60, the rigidity of this protrusion 60 can be reduced. This protrusion 60 can be easily deformed when the terminal 54 is inserted. Therefore, the insertion force is prevented from becoming large. This push switch can be easily assembled.

[0039] 6 and 7, the protrusions 44, 60 are provided on the inner walls 42, 58 on the inside (inside in the radial direction of the lid) of the holes 32, 56. The protrusions may be provided on the inner walls on the outside (outside in the radial direction of the lid) of the holes 32, 56. The protrusions may be provided on both the inner walls 42, 58 on the inside and the outer inner walls of the holes 32, 56.

[0040] 8(a) is a cross-sectional view showing a portion of a terminal holder 70 and a terminal 72 of a push switch according to yet another embodiment. This drawing shows an enlarged view of the vicinity of a hole 80. This push switch is the same as the push switch 2 in FIG. 1, except for the terminal holder 70 and the terminal 72.

[0041] In this embodiment, the terminal 72 has a leaf spring structure folded in two. By this folding, the terminal 72 is formed with a main portion 74 and a folded portion 76. The folded portion 76 has a protruding portion 78 protruding toward the main portion 74. In this terminal 72, the sum of the thickness of the main portion 74 and the thickness of the folded portion 76 is smaller than the width W of the hole 80. As shown in FIG. 8(a), of the opposing inner walls 82 of the hole 80, the main portion 74 is in contact with one of the inner walls 82, and the folded portion 76 is in contact with the other inner wall 82. The hole 80 is closed by the main portion 74 and the folded portion 76. The protruding portion 78 is in contact with the main portion 74.

[0042] Fig. 8(b) shows the terminal 72 of Fig. 8(a) in a state where it is not inserted into the hole 80. When the terminal 72 is not inserted into the hole 80, the "leaf spring" is open compared to when the terminal 72 is inserted into the hole 80. When the terminal 72 is not inserted into the hole 80, the protruding portion 78 is not in contact with the main portion 74.

[0043] During assembly, the terminal 72 is inserted into the hole 80 from above, with the folded point 84 of the terminal 72 at the leading edge. In the vicinity of the folded point 84 of the terminal 72, the width of the hole 80 is greater than the "leaf spring thickness" of the terminal 72 (the distance from the "end of the main part 74 opposite to the folded part 76 side" to the "end of the folded part 76 opposite to the main part 74 side" measured in the horizontal direction in FIG. 8). When the terminal 72 moves downward, the width of the hole 80 and the "leaf spring thickness" become equal, and the main part 74 comes into contact with one inner wall 82, and the folded part 76 comes into contact with the other inner wall 82. When the terminal 72 moves further downward, it is pushed by the inner wall 82, and the "leaf spring" is deformed in the closing direction. When the terminal 72 moves further downward, the protruding part 78 of the folded part 76 comes into contact with the main part 74, and the "leaf spring" cannot deform any further. The protrusion 78 functions as a stopper for the deformation of the “leaf spring.” The terminal 72 is in the state shown in FIG.

[0044] In this embodiment, the terminal 72 has a two-fold leaf spring structure, and the main part 74 and the folded part 76 of the terminal 72 are in contact with the inner wall 82 of the hole 80. The hole 80 is blocked by the main part 74 and the folded part 76. When the fluid filler is poured into the recess 34, the terminal 72 prevents the fluid filler from passing through the hole 80 and flowing into the body. In this push switch, the fluid filler that has flowed into the body covers the surface of the terminal 72, preventing poor contact between the terminal 72 and the conductor. The terminal 72 prevents air inside the body 4 from passing through the hole 80 and entering the fluid filler. In this push switch, voids in the filler 20 are suppressed. The terminal 72 functions as an obstruction mechanism that prevents the fluid filler and the air in the cavity from passing through the hole 80.

[0045] In this embodiment, the terminal 72 is inserted into the hole 80 from the turn-back point 84. Near the turn-back point 84, the width of the hole 80 is wider than the "leaf spring thickness" of the terminal 72, so the insertion force is small. When the terminal 72 is moved downward, the "leaf spring" deforms in the closing direction, so the force required for this movement is reduced. With this push switch, the insertion force is reduced. With this push switch, easy assembly is achieved.

[0046] In this embodiment, the folded portion 76 has a protruding portion 78. The protruding portion 78 functions as a stopper for the deformation of the "leaf spring". This allows the contact pressure between the main portion 74 and the folded portion 76 and the inner wall 82 of the hole 80 to be increased. This terminal 72 effectively prevents the fluid filler from passing through the hole 80 and flowing into the body 4. In this push switch, poor contact between the terminal 72 and the conductor is prevented by the fluid filler flowing into the body covering the surface of the terminal 72. This terminal 72 effectively prevents air inside the body 4 from passing through the hole 80 and entering the fluid filler. In this push switch, voids in the filler 20 are suppressed.

[0047] In this embodiment, the turned-back portion has the protruding portion 78 protruding toward the main portion 74. The main portion 74 may have the protruding portion 78 protruding toward the turned-back portion. The main portion 74 and the turned-back portion 76 may have the protruding portion 78.

[0048] 8, the terminal 72 is folded inward (inward in the radial direction of the lid portion). The terminal 72 may be folded outward (outward in the radial direction of the lid portion).

[0049] As described above, according to this embodiment, contact failure at the terminals and voids in the filler are suppressed, and the superiority of this embodiment is clear.

[0050] In the above embodiment, a push switch for a vehicle transmission is disclosed as an example. The scope of application of the technology disclosed herein is not limited to vehicle transmissions. The technology disclosed herein can be applied to any push switch that has a hole in a main body and a terminal that passes through the hole and that needs to prevent fluid from passing through the hole.

[0051] [Disclosure items] The following section discloses preferred embodiments.

[0052] [Item 1] The device comprises a body which is hollow inside and has a depression on its surface, a pair of holes which open into the depression, a pair of terminals which pass through the pair of holes, respectively, a pressing bar which is exposed from the body and switches between conduction and cut-off between the pair of terminals, and a filling body which is a hardened fluid filling agent; The filling material is filled in the recess so as to cover the portion of the terminal exposed to the recess side, A push switch comprising an obstruction mechanism that inhibits the filler fluid or air in the cavity from passing through the hole.

[0053] [Item 2] 2. The push switch according to item 1, wherein the obstruction mechanism is a protrusion provided on an inner wall of the hole.

[0054] [Item 3] 3. The push switch according to item 2, wherein a gap is provided between the protrusion and the terminal.

[0055] [Item 4] 3. The push switch according to item 2, wherein the protrusion and the terminal are in contact with each other.

[0056] [Item 5] 5. The push switch according to item 4, wherein the protrusion extends toward the inside of the hole while inclining downward.

[0057] [Item 6] Each of the pair of terminals has a leaf spring structure folded in two, and a main portion and a folded portion are formed in the terminal by folding, 6. The push switch according to any one of items 1 to 5, wherein the obstruction mechanism is realized by the main portion and the folded portion contacting an inner wall of the hole.

[0058] [Item 7] 7. The push switch according to item 6, wherein at least one of the main portion and the folded portion has a protrusion protruding toward the other. [Industrial Applicability]

[0059] The push switch described above is used in various devices. [Explanation of symbols]

[0060] 2. Push switch 4. Body 6. Press bar 8. Conductor 10. Spring stand 12 Spring 14, 52, 70... Terminal holder 16. Body opening 18, 54, 72... terminal 18a...Contact part 18b...Gripping part 20. Filling 22... Lead wire 24 Pressing unit 26... Fitting part 28...Lid part 30 Spring support 32, 56, 80...holes 34. Depression 36...Arcuate part 38...Extraction hole 40...Slit 42, 58, 82... Inner wall of hole 44, 60...Protrusion 74 Main part 76 Turn-back part 78...Protrusion 84... Turning point

Claims

1. The device comprises a body which is hollow inside and has a depression on its surface, a pair of holes which open into the depression, a pair of terminals which pass through the pair of holes, respectively, a pressing bar which is exposed from the body and switches between conduction and cut-off between the pair of terminals, and a filling body which is a hardened fluid filling agent; The filling material is filled in the recess so as to cover the portion of the terminal exposed to the recess side, A push switch comprising an obstruction mechanism that inhibits the filler fluid or air in the cavity from passing through the hole.

2. The push switch according to claim 1 , wherein the obstruction mechanism comprises a protrusion provided on an inner wall of the hole.

3. The push switch according to claim 2 , wherein a gap is provided between said projection and said terminal.

4. The push switch according to claim 2 , wherein the projection and the terminal are in contact with each other.

5. 5. The push switch according to claim 4, wherein the projection extends inwardly of the hole while inclining downwardly.

6. Each of the pair of terminals has a leaf spring structure folded in two, and a main portion and a folded portion are formed in the terminal by folding, 6. The push switch according to claim 1, wherein the obstruction mechanism is realized by the main portion and the folded portion contacting an inner wall of the hole.

7. 7. The push switch according to claim 6, wherein at least one of the main portion and the folded portion has a protruding portion protruding toward the other.

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