JP4338596B2 - Press switch - Google Patents

Description

  The present invention relates to a push-type switch, and more particularly to a push-type switch that can give a high-class feeling when operated (pressed).

  Conventionally, a key switch including a membrane substrate, a pair of fixed contacts, a click rubber, a frame, and a key top is known (see Patent Document 1 below).

  The membrane substrate is disposed on a chassis of an electronic device or the like.

  A pair of fixed contacts are provided on the membrane substrate.

  The click rubber is almost dome-shaped and covers a pair of fixed contacts. Conductive rubber is provided on the inner surface of the click rubber. The conductive rubber faces a pair of fixed contacts with a gap.

  The frame faces the membrane substrate and the click rubber with a slight gap. The frame has a slide guide. The slide guide is cylindrical.

  The key top has a sliding part. The sliding portion has an octagonal prism shape, is inserted into the slide guide, and slides along the thickness direction of the chassis.

  Grease is applied to the slide guide and the sliding portion in order to make the sliding smooth and reduce the generation of noise.

  When the key top is pressed with a finger, the sliding portion slides to press the click cover. When the click cover is pressed to a certain extent, the click cover is reversed, and the conductive rubber contacts the pair of fixed contacts. As a result, the pair of fixed contacts are closed. Further, when the click rubber is reversed, a click feeling is generated.

When the finger is released from the key top, the elasticity of the click rubber returns the key top to the original position and the conductive rubber moves away from the pair of fixed contacts.
Japanese Unexamined Patent Publication No. 2004-71306 (see paragraphs 0011 to 0014, FIG. 1)

  A high-class feeling is demanded for the pressure switch disposed on the instrument panel for automobiles.

  In order to give the above-mentioned key switch a high-class feeling, a method of using an expensive material for the key top or applying a special color, pattern, or the like can be considered.

  However, there is a limit to providing a high-class feeling unless the operational feeling when the key switch is input is improved.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a push-type switch that can make an operator feel high-quality when the push-type switch is operated.

In order to solve the above-described problem, the push switch according to the first aspect of the present invention includes a fixed member to which a switch body is fixed, a movable member that is slidably supported by the fixed member, and capable of transmitting a pressing force to the switch body. and the member, the push type switch and a grease applied to the sliding portion between the movable member and the fixed member, the viscosity of the grease Ri der range of 1000～2750Pa, and the fixing member the A guide groove is provided on one side of the movable member, and a rail that slides relative to the guide groove is provided on the other side, and a first grease reservoir for holding the grease in the guide groove is the guide. It is provided in at least one of the groove and the rail .

Since the viscosity of the grease is in the range of 1000 to 2750 Pa as described above, when the operator presses the movable member with the finger, an appropriate weight (force that the fingertip receives from the grease) is transmitted to the fingertip, and the operator moves the movable member. It can be seen that moves more slowly than the conventional one. Further, the operator can feel that the play of the movable member and the generation of sound are further suppressed. As described above, since the guide groove is provided on one of the fixed member and the movable member and the rail that slides relative to the guide groove is provided on the other side, the movable member slides more stably. As described above, since the first grease reservoir is provided in at least one of the guide groove and the rail, the grease is hardly reduced even when used for a long period of time, and a good operational feeling is maintained over a long period of time.

  According to a second aspect of the present invention, in the press switch according to the first aspect, the grease is a fluorine-based grease.

  Since the grease is a fluorine-based grease as described above, the change in viscosity due to the temperature is small, and the change in operational feeling due to the change in temperature is suppressed.

According to a third aspect of the present invention, in the push-type switch according to the first or second aspect , the second grease reservoir for returning the grease moved to one end side of the guide groove to the center portion of the guide groove is the guide. It is provided on one end side of the groove or the rail.

  As described above, since the second grease reservoir is provided on one end side of the guide groove or rail, the grease is hardly reduced even when used for a long period of time, and a good operational feeling is maintained over a long period of time.

  As described above, according to the press switch of the first aspect of the invention, it is possible to give a high-class feeling to the operator during operation.

  According to the press switch of the invention of claim 2, it is possible to suppress a change in operational feeling due to a change in temperature.

  According to the push-type switch of the invention of claim 3, it is possible to further enhance the sense of quality during operation.

  According to the pressing type switch of the fourth and fifth aspects of the invention, a good operational feeling can be maintained over a long period of time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is an exploded perspective view of a push-type switch according to a first embodiment of the present invention, FIG. 2 is a perspective view when the knob of the push-type switch shown in FIG. 1 is viewed obliquely from below, and FIG. 3A is shown in FIG. FIG. 3B is a plan view of the push-type switch, FIG. 3C is a bottom view of the push-type switch, FIG. 3D is a right side view of the push-type switch, and FIG. 4 is IV-IV in FIG. 5 is a cross-sectional view taken along the line V-V in FIG. 3D, and FIG. 6 is an enlarged view of a portion A in FIG. 5.

  As shown in FIGS. 1 to 6, the push switch includes a switch body 3, a printed wiring board 5, a case 7, and a knob (movable member) 9.

  The switch body 3 is arranged at one corner of the printed wiring board 5. The switch body 3 has a click plate 31, a pair of fixed contacts (not shown), and a movable contact (not shown). The click plate 31 is made of an insulating elastic material and is formed in a substantially dome shape. A convex portion 31 a is formed on the top of the click plate 3. The pair of fixed contacts are disposed on the printed wiring board 5 and covered with the click plate 31. The movable contact is provided on the inner surface of the click plate 31 and faces a pair of fixed contacts.

  A conductor pattern (not shown) is formed on the printed wiring board 5. A part of the conductor pattern is connected to a pair of fixed contacts.

  The case 7 is integrally formed of resin and has a cylindrical portion 71, a frame portion 72, and a housing portion 73.

  The cylindrical portion 71 is substantially a rectangular tube shape, and includes three columnar portions 71a and a plurality of plate-shaped portions 71d interposed between the three columnar portions 71a. The columnar portion 71a extends along the height direction H1 of the cylindrical portion 71 (see FIG. 1). The height of the columnar part 71a is higher than the height of the plate-like part 71d. Therefore, the tip of the columnar portion 71a protrudes from the tip surface of the plate-like portion 71d, and this protruding portion is a grease supply protrusion 71e (see FIGS. 1 and 4). A guide groove 71h is formed on the outer surface of the columnar portion 71a. The guide groove 71h extends along the height direction H1 of the cylindrical portion 71. A grease supply reservoir (second grease reservoir) 71k is formed on the grease supply protrusion 71e. The grease supply reservoir 71k extends to the end of the guide groove 71h.

  Projections 71p are formed on the two opposing plate-like portions 71d. The protrusion 71p is substantially wedge-shaped.

  The frame portion 72 surrounds one end of the cylindrical portion 71. The frame portion 72 has three grease supply reservoirs (second grease reservoirs) 72a. The grease supply reservoir 72a communicates with the guide groove 71h.

  The accommodating portion 73 is formed at one corner of the frame portion 72, and almost half of the accommodating portion 73 enters the cylindrical portion 71 (see FIG. 5). A hole 73 a is formed at the top of the accommodating portion 73. The accommodating portion 73 accommodates the switch body 3.

  The printed wiring board 5 and the case 7 described above constitute a fixing member to which the switch body 3 is fixed.

  The knob 9 is substantially box-shaped and is made of resin. The knob 9 has a skirt portion 91, a pressed portion 92, and a pressing portion 93.

  The skirt portion 91 has a substantially rectangular tube shape, and includes three rails 91a and a plurality of plate-like portions 91d interposed between the three rails 91a. The rail 91a extends along the height direction H2 of the knob 9 (see FIG. 1). The height of the rail 91a is higher than the height of the plate-like portion 91d. Therefore, the front end of the rail 91a protrudes from the front end surface of the plate-like portion 91d, and this protruding portion is a grease supply protrusion 91e (see FIG. 1). A grease holding groove (first grease reservoir) 91h is formed in the rail 91a. The grease holding groove 91h extends along the longitudinal direction of the rail 91a.

  The rail 91a is slidably inserted into the guide groove 71h. Thus, in the first embodiment, the guide groove 71h and the rail 91a constitute a sliding portion.

  The grease supply protrusion 91e enters the grease supply reservoir 72a when the knob 9 is closest to the frame portion 72.

  A hole 91p is formed in each of the two opposing plate-like portions 91d. The hole 91p is rectangular and receives the protrusion 71p. At this time, the protrusion 71p is relatively movable within a predetermined range. This determines the stroke of the knob 9 and prevents the knob 9 from falling off the case 7.

  The pressed portion 92 is a portion pressed by a finger. The pressed portion 92 has a plate shape and is coupled to one end of the skirt portion 91. The pressed portion 92 has three grease supply reservoirs (second grease reservoirs) 92a. The grease supply reservoir 92a is formed so as to surround the rail 91a and communicates with the grease holding groove 91h. The grease supply reservoir 92a receives the grease supply protrusion 71e when the knob 9 is closest to the frame portion 72.

  The pressing portion 93 is disposed at one corner of the pressed portion 92 and is coupled to the skirt portion 91. The distal end portion of the pressing portion 93 is inserted into the accommodating portion 73 through the hole 73a. The pressing portion 93 presses the convex portion 31 a of the click plate 31.

  Grease 11 is applied to the guide groove 71h and the rail 91a (see FIG. 6). As the grease 11, a fluorinated grease having a viscosity in the range of 1000 to 2750 Pa is used.

  In addition, the viscosity of the grease 11 was represented by rotational torque. This rotational torque is the shear force (unit Pa) when 0.2 cc of grease is placed on the plate of the rotational viscometer and this plate is rotated at 10 rpm.

  7 is a cross-sectional view of the same cut portion as FIG. 4 when the knob is not pressed, and FIG. 8 is a cross-sectional view of the same cut portion as FIG. 4 when the knob is pressed.

  Next, the operation of the push switch of this embodiment will be described.

  In a state where the operator does not press the knob 9 with a finger (the state shown in FIG. 7), the knob 9 is pressed via the convex portion 31 a by the elasticity of the click plate 31, and the knob 9 is separated from the printed wiring board 5. In position.

  When the operator presses the knob 9 with a finger against the elasticity of the click plate 31, the pressing force is transmitted to the click plate 31 via the pressing portion 93 and the convex portion 31a, and the click plate 31 is gradually crushed. When the pressing force on the click plate 31 exceeds a predetermined value, the click plate 31 is reversed and enters the state shown in FIG. At this time, a click feeling is generated and the movable contact contacts a pair of fixed contact points, and the switch body 3 is turned on.

  When the finger is released from the knob 9, the knob 9 returns to the original position by the elasticity of the click plate 31, the movable contact is separated from the pair of fixed contacts, and the switch body 3 is turned off.

  Next, circulation of the grease 11 will be described.

  When the operator does not press the knob 9 with a finger, the knob 9 is located away from the printed wiring board 5 by the click plate 31 as described above. In this state, the grease supply protrusions 71e and 91e are separated from the grease supply reservoirs 92a and 72a, respectively.

  When the knob 9 is pressed and moved toward the printed wiring board 5, the grease 11 in the guide groove 71h is held by the grease holding groove 91h, so that it hardly leaks from the guide groove 71h. When it is in the ON state, it is slightly discharged from the guide groove 71h. However, the grease 11 discharged from the guide groove 71h is stored in the grease supply reservoirs 72a and 92a as shown in FIG. At this time, the grease supply protrusions 71e and 91e are inserted into the grease supply reservoirs 92a and 72a, respectively, and the grease 11 stored in the grease supply reservoirs 72a and 92a adheres to the grease supply protrusions 71e and 91e.

  When the finger is released from the knob 9 and the knob 9 returns to the original position by the elasticity of the click plate 31, the grease 11 attached to the grease supply protrusions 71e and 91e returns to the guide groove 71h. Therefore, the reduction of the grease 11 is extremely reduced.

  Next, the operational feeling when the knob 9 is operated will be described.

  The rail 91a slides in the guide groove 71h after the operator starts pressing the knob 9 until the switch body 3 is turned on. At this time, since the grease 11 having a high viscosity is present between the rail 91a and the guide groove 71h, the rail 91a moves slowly, and generation of noise such as rattling or sliding noise of the knob 9 is suppressed. In this way, the operator feels a moderate resistance at the fingertip when pressing the knob 9, and the knob 9 at that time moves gently and slowly without rattling, so the operator can obtain a high-class feeling. Further, when the click plate 31 is reversed, the click feeling becomes gentle by the high-viscosity grease 11, and the high-grade feeling is enhanced.

  Next, the effect of this embodiment will be described.

  According to this push type switch, since the grease 11 having a viscosity in the range of 1000 to 2750 Pa is used, when the operator presses the knob 9 with a finger, an appropriate resistance acts on the finger of the operator, and the knob 9 moves slowly and quietly with little rattling. As a result, the operator can obtain a high-class feeling.

  Further, since the grease 11 is a fluorine-based grease, the change in viscosity due to the temperature is small, and the change in operational feeling due to the change in temperature can be suppressed.

  Further, since the grease holding groove 91h, the grease supply reservoirs 72a and 92a, and the grease supply protrusions 91e and 71e are employed, the grease 11 is hardly reduced even when used for a long time, and a high-class feeling can be maintained for a long time.

  In this embodiment, a fluorine-based grease is used as the grease 11. However, the grease is not limited to a fluorine-based grease, and for example, an oliffin-based grease may be used.

  Further, although the grease holding groove 91h is provided in the rail 91a, it is not always necessary to provide the grease holding groove 91h in the rail 91a.

  Although the case 7 is provided with the grease supply protrusion 71e and the grease supply reservoir 72a, and the knob 9 is provided with the grease supply protrusion 91e and the grease supply reservoir 92a, the grease supply protrusions 71e and 91e and the grease supply reservoirs 72a and 92 are necessarily provided. There is no need.

  In this embodiment, the guide groove 71 h is provided in the case 7 and the rail 91 h is provided in the knob 9. However, the guide groove may be provided in the knob 9 and the rail may be provided in the case 7.

  The number of guide grooves 71h and rails 91h is not limited to three.

  Next, a description will be given of tests conducted to determine the range of the viscosity of the grease that produces a high-class feeling during operation.

Table 1 shows the viscosity of the samples and greases used in this test.

  FIG. 9 is a graph showing the relationship between the average rank of each sample and the viscosity of the grease, FIG. 10 is a table showing the evaluation items and the seven-point evaluation points, and FIG. 11 is the average evaluation of each sample regarding the moist feeling during knob operation. 12 is a graph showing the relationship between the point and the viscosity of the grease, FIG. 12 is a graph showing the relationship between the average evaluation point of each sample related to the rattling of the knob and the viscosity of the grease, and FIG. 13 is a graph showing the relationship between the sound generation during the knob operation. It is a graph which shows the relationship between an average evaluation score and the viscosity of grease.

  As shown in Table 1, sample A was prepared by applying grease to the sliding parts (guide groove 71h and rail 91a) of the push switch. Samples B to G were coated with greases having different viscosities. Table 1 shows the viscosity of the grease used for each of the samples B to G.

  Next, the samples A to G are operated by a plurality of monitors, and after ranking each sample A to G with respect to the feel, rattling and superiority of the sound at that time, the average of the ranks of the samples A to G Asked. The result is shown in FIG.

  On average, the monitor felt a sense of quality for the 3rd and higher samples. The viscosity of the grease used for the third or higher sample is in the range of 1000 Pa to 2750 Pa.

  Next, each sample A to G was evaluated with respect to the moist feeling (resistance feeling), rattling, and operation noise. In order to score the evaluation, as shown in FIG. 10, the evaluation of each item is divided into 7 levels, and in the plus (+) evaluation, 3, 2, and 1 are given for each stage, and minus (− In the evaluation of), evaluation points of -1, -2, and -3 were given for each stage, and when neither could be evaluated, an evaluation score of 0 was given.

  The plurality of monitors evaluated each sample A to G for each item. FIG. 11 shows the relationship between the average evaluation point of the moist feeling of each sample A to G and the viscosity of the grease, and FIG. 12 shows the relationship between the average evaluation point regarding the roughness of each sample A to G and the viscosity of the grease. FIG. 13 shows the relationship between the average evaluation point regarding the sounds of samples A to G and the viscosity of the grease.

  As shown in FIG. 11, the evaluation point of moist feeling is higher as the viscosity of the grease is higher. However, the moist feeling did not match the high-quality feeling at the time of operation, and when the viscosity exceeded 2500 Pa, the moist feeling became excessive, and many monitors felt an extreme decrease in the feeling of input operation (feeling to push in).

  However, as shown in FIG. 12 and FIG. 13, the evaluation point for rattling and sound generation becomes higher as the viscosity of the grease increases. Therefore, when evaluated in total, even if the viscosity of the grease exceeds 2500 Pa, a high-class feeling can still be obtained. . Therefore, as shown in FIG. 9, the range in which a high-class feeling can be obtained is 1000 to 2750 Pa.

  FIG. 14 is a graph showing the relationship between the sliding speed and sliding resistance of the knob when a low-viscosity grease and a high-viscosity grease are used.

  As shown in FIG. 14, when grease having a low viscosity indicated by a dotted line is used (sample B), even if the sliding speed v of the knob 9 increases, the sliding resistance F does not increase so much. On the other hand, when grease having a high viscosity indicated by a solid line is used (sample D), the sliding resistance F increases at a higher rate than the increase rate when the sliding speed v of the knob 9 increases.

The sliding resistance F is assumed that the viscosity coefficient of grease is C and the sliding speed of the knob is v.
F = Cv
Is required.

  As described above, when grease having a high viscosity is used, the sliding resistance F increases at a rate higher than the increasing rate of the sliding speed, so that a rapid change in the load on the knob 9 is alleviated. This action mainly leads to an improvement in operational feeling after the click plate 31 is inverted.

  Based on the above test results, the viscosity range of the grease 11 was set to 1000 Pa to 2750 Pa.

  Since it is difficult to express the difference in operation feeling between sample C and sample D, the difference in operation feeling between sample C and sample D is graphed.

  FIG. 15 is a graph in which the horizontal axis represents the knob stroke, and the vertical axis represents the knob speed and the load on the knob.

  In order to make it easier to compare the operational feeling of sample C and the operational feeling of sample D, the pressing force applied to knob 9 from the start of pressing knob 9 until the click plate 31 is reversed (between strokes S0 to S1) is sampled. C and Sample D were the same.

  Curve VC is a line indicating the relationship between the stroke (S) and the speed (V) of the knob 9 of the sample C, Curve VD is a line indicating the relationship between the stroke (S) and the speed (V) of the knob 9 of the sample D, Curve FC is a line indicating the relationship between the stroke (S) and the load (F) of the knob 9 of the sample C, and curve FD is a line indicating the relationship between the stroke (S) and the load (F) of the knob 9 of the sample D. is there.

  As shown in FIG. 15, the knob 9 of the sample D moves slightly more slowly than the knob 9 of the sample C between the strokes S <b> 0 to S <b> 1.

  While the click plate 31 is reversed until the knob 9 is stopped (strokes S1 to S2), both the speed (V) and the load (F) of the sample C change suddenly, but the speed of the sample D (V) and the load is changed. Both (F) change more gently than sample C. That is, the click feeling is sharp in the sample C, and the click feeling is gentle in the sample D.

  As described above, a high-grade operation feeling of the knob 9 can be obtained by the slow movement of the knob 9 and the gentle feeling of clicking.

  Next, a modification of the first embodiment will be described.

  FIG. 16 is a cross-sectional view of a sliding portion of a first modification of the first embodiment.

  As shown in FIG. 16, in the first modification, a plurality of grooves 91q are formed on the side surface of the grease supply protrusion 91e.

  In the first modification, the grease 11 is easily attached to the grease supply protrusion 91e by the groove 91q, so that the circulating action of the above-described grease 11 can be enhanced.

  FIG. 17 is a cross-sectional view of a sliding portion of a second modification of the first embodiment.

  As shown in FIG. 17, in the second modification, the bulging portion 91r is formed in the portion of the rail 91a that is accommodated in the grease supply reservoir 92a. The bulging portion 91r is shaped to fit into the grease supply reservoir 71k. The bulging portion 91r returns the grease 11 in the grease supply reservoir 71k into the guide groove 71h when the grease supply protrusion 71e is inserted into the grease supply reservoir 92a.

  In the second modification, the grease 11 in the grease supply reservoir 71k can be returned to the guide groove 71h by the bulging portion 91r, so that the circulating action of the grease 11 can be enhanced as in the first modification.

  FIG. 18 is an enlarged cross-sectional view of a part A of a third modification of the first embodiment.

  As shown in FIG. 18, in this third modified example, grease holding grooves 71r are formed on the opposing inner surfaces of the guide groove 71h, respectively. The grease holding groove 71r extends in parallel with the guide groove 71h.

  In the third modification, since the grease holding groove 71r is provided in addition to the grease holding groove 91h, the reduction of the grease 11 can be further reduced.

  FIG. 19 is an enlarged cross-sectional view of part A of the fourth modification of the first embodiment.

  As shown in FIG. 19, in the fourth modification, grease holding grooves 71r are formed on the opposing inner surfaces of the guide groove 71h, and the grease is held from the upper surface of the rail 91a (the surface facing the bottom surface of the guide groove 71h). The groove 91h was abolished.

  This fourth modification has the same operational effects as the first embodiment shown in FIG.

  FIG. 20 is an enlarged cross-sectional view of a part A of a fifth modification of the first embodiment.

  As shown in FIG. 20, in the fifth modification, grease holding grooves 91s are formed on both side surfaces of the rail 91a, and the grease holding grooves 91h are eliminated from the rail 91a.

  This fifth modification has the same effects as those of the first embodiment shown in FIG.

  FIG. 21 is an enlarged cross-sectional view of part A of the sixth modification of the first embodiment.

  As shown in FIG. 21, in the sixth modification, a key 91t is formed instead of forming the grease retaining groove 91h on the upper surface of the rail 91a (the surface facing the bottom surface of the guide groove 71h). The key 91t forms a gap G for holding the grease 11 between the upper surface of the rail 91a and the guide groove 71h.

  This sixth modification has the same operational effects as the first embodiment shown in FIG.

  FIG. 22 is a cross-sectional view of a sliding portion of a seventh modification of the first embodiment.

  As shown in FIG. 22, in the seventh modification, a plurality of grease retaining grooves 91u are formed on both side surfaces of the rail 91a instead of forming the grease retaining grooves 91h on the upper surface of the rail 91a. The grease retaining groove 91u extends in a direction orthogonal to the longitudinal direction of the rail 91a.

  This seventh modification has the same effects as those of the first embodiment shown in FIG.

  FIG. 23 is an exploded perspective view of a push-type switch according to a second embodiment of the present invention, FIG. 24 is a perspective view of a state where a part of the case of the push-type switch shown in FIG. FIG. 26 is a cross-sectional view of the push-type switch shown in FIG.

  Portions common to the first embodiment are denoted by the same reference numerals as those in the first embodiment, description thereof is omitted, and only portions having different configurations will be described.

  As shown in FIGS. 23 to 26, this push switch includes a switch body 3, a printed wiring board 5, a case 207, a knob 209, and a slider 210.

  Although the movable member of the first embodiment is composed of only the knob 9, the movable member of the second embodiment is composed of the knob 209 and the slider 210.

  The case 207 includes a cylindrical portion 271, a lid portion 272, and a columnar portion 273. The case 207 accommodates the slider 210 and is fixed on the printed wiring board 5. The cylindrical portion 271 has a rectangular tube shape. The lid portion 272 is coupled to one end of the cylindrical portion 271. A hole 272a is formed in the lid portion 272. Three grease supply reservoirs (second grease reservoirs) 272b are formed on the inner surface of the lid portion 272 (see FIG. 25). Three columnar portions 273 are arranged in the cylindrical portion 271. The columnar part 273 is coupled to the cylindrical part 271 and the lid part 272. A guide groove 273 a is formed in the columnar portion 273. The guide groove 273a communicates with the grease supply reservoir 272b. A grease supply protrusion 273b is formed by cutting out a part of one end of the columnar portion 273.

  The knob 209 has a skirt portion 291 and a pressed portion 292. The skirt portion 291 has a rectangular tube shape. Two holes 291p are formed in the skirt portion 291. The pressed portion 292 has a flat plate shape and is coupled to one end of the skirt portion 291. The peripheral portion of the pressed portion 292 protrudes from the side surface of the skirt portion 291.

  The slider 210 has a first cylindrical portion 211 and a second cylindrical portion 212.

  The 1st cylindrical part 211 is a rectangular tube shape, and the rail 211a is formed in three places of the side surface. One end of the rail 211a protrudes from one end surface of the first cylindrical portion 211, and this protruding portion is a grease supply protrusion 211b (see FIG. 26). The rail 211a is slidably inserted into the guide groove 273a of the case 207. As a result, the slider 210 can slide with respect to the case 207. The grease supply protrusion 211 b is inserted into the grease supply reservoir 272 b of the lid portion 272 when the slider 210 is lifted by the click plate 31.

  Three projecting portions 211c are formed at one end of the first cylindrical portion 211 so as to be adjacent to the rail 211a. A grease supply reservoir 211d is formed in the overhanging portion 211c. The grease supply reservoir 211d receives one end of the rail 211a. Further, the grease supply reservoir 211 d receives the grease supply protrusion 273 b of the columnar portion 273 when the slider 210 is lifted by the click plate 31.

  A pressing piece 211e that presses the switch body 3 and a reinforcing plate 211f that supports the pressing piece 211e are provided on the inner side surface of the first cylindrical portion 211 (see FIG. 26).

  The second tubular portion 212 is a rectangular tubular shape, is slightly smaller than the first tubular portion 211, and is coupled to the other end of the first tubular portion 211. The second cylindrical portion 212 protrudes from the case 207 through the hole 272a. Two protrusions 212 a are formed on the side surface of the second cylindrical portion 212. The protrusion 212a is inserted into the hole 291p of the knob 209. Thereby, the knob 209 is fixed to the second cylindrical portion 212.

  The second embodiment has the same effects as the first embodiment.

FIG. 1 is an exploded perspective view of a push-type switch according to a first embodiment of the present invention. FIG. 2 is a perspective view when the knob of the push-type switch shown in FIG. 1 is viewed obliquely from below. 3A is a front view of the push-type switch shown in FIG. FIG. 3B is a plan view of the pressing switch. FIG. 3C is a bottom view of the pressing switch. FIG. 3D is a right side view of the pressing switch. 4 is a cross-sectional view taken along line IV-IV in FIG. 3A. FIG. 5 is a cross-sectional view taken along line VV in FIG. 3D. FIG. 6 is an enlarged view of part A in FIG. FIG. 7 is a cross-sectional view of the same cut portion as FIG. 4 when the knob is not pressed. FIG. 8 is a cross-sectional view of the same cut portion as FIG. 4 when the knob is pressed. FIG. 9 is a graph showing the relationship between the average rank of each sample and the viscosity of the grease. FIG. 10 is a table showing evaluation items and seven-level evaluation points. FIG. 11 is a graph showing the relationship between the average evaluation score of each sample and the viscosity of the grease with respect to the moist feeling during knob operation. FIG. 12 is a graph showing the relationship between the average evaluation score of each sample and the viscosity of the grease with respect to rattling of the knob. FIG. 13 is a graph showing the relationship between the average evaluation score of each sample and the viscosity of grease with respect to the generation of sound during knob operation. FIG. 14 is a graph showing the relationship between the sliding speed and sliding resistance of the knob when a low-viscosity grease and a high-viscosity grease are used. FIG. 15 is a graph in which the horizontal axis represents the knob stroke, and the vertical axis represents the knob speed and the load on the knob. FIG. 16 is a cross-sectional view of a sliding portion of a first modification of the first embodiment. FIG. 17 is a cross-sectional view of a sliding portion of a second modification of the first embodiment. FIG. 18 is an enlarged cross-sectional view of a part A of a third modification of the first embodiment. FIG. 19 is an enlarged cross-sectional view of part A of the fourth modification of the first embodiment. FIG. 20 is an enlarged cross-sectional view of a part A of a fifth modification of the first embodiment. FIG. 21 is an enlarged cross-sectional view of part A of the sixth modification of the first embodiment. FIG. 22 is a cross-sectional view of a sliding portion of a seventh modification of the first embodiment. FIG. 23 is an exploded perspective view of a push switch according to a second embodiment of the present invention. 24 is a perspective view of a state where a part of the case of the push-type switch shown in FIG. 23 is cut out and turned over. FIG. 25 is an enlarged view of a portion B in FIG. 26 is a cross-sectional view of the push-type switch shown in FIG.

Explanation of symbols

3 Switch body 5 Printed wiring board (fixing member)
7 Case (fixing member)
71h Guide groove (sliding part)
71k Grease supply reservoir (second grease reservoir)
72a Grease supply reservoir (second grease reservoir)
9 Knob (movable member)
91a rail (sliding part)
91h Grease holding groove (first grease reservoir)
92a Grease supply reservoir (second grease reservoir)
11 Grease 207 Case 272b Grease supply reservoir (second grease supply reservoir)
273a Guide groove (sliding part)
273b Grease supply protrusion 210 Slider 211a Rail (sliding part)
211d Grease supply reservoir

Claims (3)

A fixing member to which the switch body is fixed;
A movable member supported slidably on the fixed member and capable of transmitting a pressing force to the switch body;
In a press switch comprising a grease applied to a sliding portion between the fixed member and the movable member,
The viscosity of the grease Ri range der of 1000～2750Pa,
A guide groove is provided on one of the fixed member and the movable member, and a rail that slides relative to the guide groove is provided on the other side.
A pressure switch, wherein a first grease reservoir for holding the grease in the guide groove is provided in at least one of the guide groove and the rail .   The press switch according to claim 1, wherein the grease is a fluorine-based grease. Claim 1, characterized in that the second grease reservoir for returning the grease moved to one end side of the guide groove in a central portion of the guide groove is provided on one end side of the guide groove or the rail Or the press type switch of Claim 2 .

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