JP4442906B2 - Switch structure of electrical equipment - Google Patents

Description

  The present invention relates to a switch structure incorporated in an electric device such as a hair dryer.

  A switch structure in an electric device, in particular, a slide switch can be found in Patent Document 1, for example. In this case, a slide switch is disposed in a switch recess formed in the outer surface of the main body case, and an opening surface of the switch recess is covered with a switch panel fixed to the main body case. A switch knob is assembled to the switch panel, and the slide switch can be switched by reciprocating the switch knob.

  The slide switch includes a housing main body for incorporating a movable contact and a fixed contact, a slider for switching the movable contact, a cover that covers both the contacts and the outer surface of the slider, and the like. An operation protrusion is integrally provided on the slider, and the operation protrusion is exposed to the switch outer surface from a switching groove opened in the cover. A housing is constituted by the housing body and the cover.

Utility Model Registration No. 2583199 (paragraph number 0012, FIG. 1)

  Many electric devices such as hair dryers are made of plastic parts for case bodies and internal parts, so that parts of the case bodies and internal parts may be damaged when subjected to a drop impact or a large external force. Or a foreign material may enter the inside of a case body from the knob groove opened for operation knobs. Such debris and foreign matter can easily cause a failure, for example, the debris can fit into the switching groove of the slide switch, or the debris can enter from the switching groove, making it impossible to switch the slider or causing poor continuity. There is. In some cases, even though the slide switch cannot be switched, the switch knob is forcibly slid to break the connection protrusion provided on the inner surface of the switch knob.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a switch structure for an electric device that can eliminate the possibility that a slide switch cannot be switched due to debris or foreign matter, or that the slide switch falls into poor conduction, and can always perform switch operation properly.

In the switch structure of the present invention, a slide switch 9 is disposed inside the case body 2, and a switch knob 10 for switching the slide switch 9 is provided on the outer surface of the case body 2. The slide switch 9 includes a housing 11 and a slider 12 accommodated in the housing 11. A switching groove 15 is opened on the outer surface of the housing 11 facing the switch knob 10, and an operation projection 16 of the slider 12 protrudes from the switching groove 15 to the outer surface of the housing 11. The switch knob 10 is a shield that covers the operating portion 20 exposed on the outer surface of the case body 2, a connecting portion 22 that is provided on the inner surface side of the case body 2 and engages with the operating protrusion 16, and an opening surface of the switching groove 15. And a body 23 . The entire stroke range of the scan Itchinobu 10, it closes the switching groove 15 in sliding contact state and the opening circumferential wall of the shield 23 is switching groove 15. The shield 23 is formed in a rectangular container shape with a peripheral frame 25 that surrounds the opening edge of the switching groove 15 and a closing wall 26 that closes the outer surface of the peripheral frame 25.

  The connecting portion 22 formed as a recess engages and connects with the operation projection 16 of the slider 12 in a state of being externally fitted. The shield 23 includes a first shielding part 23A provided continuously on one side in the sliding direction of the connecting part 22 and a second shielding part 23B provided continuously on the other side in the sliding direction of the connecting part 22.

Opening width B2 of the end face outer width B1 of the switching groove 15 of the circumferential surrounding frame 25 Redirecting a to hear set. The peripheral frame 25 is formed so that the end surface of the peripheral frame 25 that defines the outer width B1 is along the opening edge of the switching groove 15 that defines the opening width B2.

  The slider 12 is supported by the housing 11 so as to be able to slide back and forth between an off position and a plurality of on positions. At each stroke end of the switch knob 10 on the off position side and on position side, a partition wall 27 is formed on the inner surface of the peripheral frame 25 of both the shielding portions 23A and 23B to slidably contact the housing 11 and prevent foreign matter from entering.

  A blade wall 21 that is retained by the inner wall of the case body 2 is formed around the first shielding portion 23A and the second shielding portion 23B.

  A groove that engages the sliding contact surfaces of the case body 2 and the switch knob 10 to guide the switch knob 10 and to prevent the switch knob 10 from moving or tilting in a direction crossing the sliding direction. 36 and a protrusion 35 are formed.

  The closing walls 26 of the first shielding part 23 </ b> A and the second shielding part 23 </ b> B are retained by the inner wall of the case body 2.

  In the present invention, in the switch structure in which the slide switch 9 and the switch knob 10 are arranged inside and outside the case body 2, the operation portion 20, the connecting portion 22 provided on the inner surface side of the case body 2, and the switching groove 15. The switch knob 10 is constituted by a shield 23 or the like that covers the opening surface, and the switching groove 15 opened in the housing 11 of the slide switch 9 can be closed by the shield 23 in the entire stroke range of the switch knob 10.

  Therefore, according to the switch structure of the present invention, even if debris or foreign matter enters the case body 2, the debris or foreign matter fits in the switching groove 15 of the slide switch 9 or enters the housing 11 from the switching groove 15. It is possible to reliably prevent the entry by the shield 23 and prevent the slide switch 9 from being switched or causing a poor conduction, so that the switch operation in the electric device can always be performed properly. Since the shield 23 is in sliding contact with the opening peripheral wall of the switching groove 15 in the entire stroke range of the switch knob 10, there is no room for debris or foreign matter to enter between the shield 23 and the opening peripheral wall of the switching groove 15. Furthermore, even if debris or foreign matter adheres to the opening peripheral wall of the switching groove 15, the shield 23 can forcibly remove the debris or foreign matter by operating the switch knob 10 to slide.

  When the shielding body 23 is constituted by the first shielding part 23A provided on one side of the connecting part 22 and the second shielding part 23B provided on the other side of the connecting part 22, the shielding body 23 is formed as an independent component. In comparison, the overall structure of the switch knob 10 can be simplified, and the cost required for manufacturing the switch structure can be reduced accordingly. Furthermore, since the shield 23 is integrated with the switch knob 10 via the connecting portion 22, when the switch knob 10 is slid, the shield 23 can be smoothly moved to close the switching groove 15. .

  Each of the first shielding portion 23A and the second shielding portion 23B is formed in a container shape with the peripheral frame 25 and the closing wall 26, and the outer width B1 of the end surface of the peripheral frame 25 is slightly smaller than the opening width B2 of the switching groove 15. According to the large switch structure, the sliding contact area between the shielding portions 23A and 23B and the housing 11 can be minimized while reliably preventing debris and foreign matter from entering, and the sliding friction between the two can be reduced. Accordingly, the switching operation of the switch knob 10 can be accurately performed.

  A partition wall 27 is formed on the inner surface of the peripheral frame 25 of both shielding portions 23A and 23B, and foreign matter is prevented from entering between the housing 11 and the partition wall 27 at the end of each stroke of the switch knob 10 on the off position side and on position side. According to such a switch structure, even if a part of the peripheral frame 25 of each shielding portion 23A, 23B protrudes from the end portion of the housing 11 of the slide switch 9 at the stroke end of the switch knob 10, fragments and foreign matters are switched. Intrusion into the groove 15 is blocked by the partition wall 27, and the slide switch 9 can be prevented from being switched or it is possible to more reliably prevent the continuity failure.

  According to the switch structure in which the wing wall 21 is formed so as to protrude around the first shielding portion 23A and the second shielding portion 23B, and the wing wall 21 is retained by the inner wall of the case body 2, the switch knob is operated during the slide switching operation. The peripheral frame 25 can always be brought into sliding contact with the housing 11 by restricting the floating of the case 10 from the case body 2, so that debris and foreign matter enter from the sliding contact surface between the peripheral frame 25 and the housing 11. Thus, the room for entering the switching groove 15 is eliminated, and the reliability of the switch structure can be further improved.

  Grooves 36 and projections 35 that are engaged with each other are formed on the sliding contact surface between the case body 2 and the switch knob 10, and the switch knob 10 is guided only in a reciprocating manner by the regulating action of both 35 and 36, and the switch According to the switch structure that restricts the knob 10 from moving or tilting in the direction crossing the sliding direction, the movement locus of the shield 23 is changed or meandering is restricted, so that the switching groove 15 is formed in the shield 23. In particular, even when the outer width B1 of the end face of the peripheral frame 25 is close to the opening width B2 of the switching groove 15, the switching groove 15 is reliably closed with the peripheral frame 25. Thus, it is possible to prevent foreign matter and the like from entering the switching groove 15.

  According to the switch structure in which the closing walls 26 of the first shielding portion 23A and the second shielding portion 23B are retained by the inner wall of the case body 2, the switch knob 10 is prevented from being lifted off from the case body 2 during a slide switching operation. Thus, the peripheral frame 25 can be always slidably contacted with the housing 11, thereby eliminating the entry of debris and foreign matter from the slidable contact surface between the peripheral frame 25 and the housing 11 and entering the switching groove 15. Further, the reliability of the switch structure can be further improved. In particular, when the retaining wall 26 and the wing wall 21 are retained by the inner wall of the case body 2, the switch knob 10 is further reliably prevented from floating away from the case body 2, thereby blocking the intrusion of debris and foreign matter. it can.

(Example) FIGS. 1-8 shows the Example which applied the switch structure based on this invention to the hair dryer (electrical equipment). In FIG. 2, the hair dryer has a hollow cylindrical main body case 1 that is long on the left and right sides, and a grip (case body) 2 provided on the rear side of the lower surface of the main body case 1. The blower fan 3, the motor 4 that rotationally drives the blower fan 3, and the heater 5 are arranged in the order of description from the suction port side. A switch structure is provided on the front face of the grip 2 to switch the energized state of the motor 4 and the heater 5. The grip 2 can be displaced between a use posture indicated by a solid line and a folded storage posture indicated by an imaginary line.

  The switch structure includes a slide switch 9 disposed inside the grip 2 and a switch knob 10 disposed on the outer surface of the case body 2 to switch the slide switch 9. As shown in FIG. 1, the slide switch 9 includes a housing 11, a slider 12 accommodated in the housing 11, a movable contact 13, a fixed contact 14, and the like. The housing 11 includes a rectangular box-shaped housing main body 11a and a cover 11b having a U-shaped cross-section that closes the opening surface of the housing main body 11a. A switching groove 15 is formed on the main surface wall of the cover 11b facing the switch knob 10. It is open. The slider 12 is guided and supported by the housing main body 11 so as to be only slidable in the vertical direction. A square-axis operation protrusion 16 formed integrally with the slider 12 is projected from the switching groove 15 to the outer surface of the housing 11.

  As shown in FIGS. 3 to 6, the switch knob 10 includes a bullet-shaped operation unit 20 exposed on the outer surface of the grip 2, a wing wall 21 that is slidably guided by the grip 2 and held at the same time, and a wing wall 21. A U-shaped frame-shaped connecting portion 22 provided at the upper and lower center of the inner surface and a shield 23 formed above and below the connecting portion 22 and covering the opening surface of the switching groove 15 in the entire stroke range of the switch knob 10 are integrally provided. Made of plastic molded products.

  As shown in FIG. 3, the shield 23 is continuously provided above the connecting portion 22 (on one side in the sliding direction) and continuously below the connecting portion 22 (on the other side in the sliding direction). It is comprised with the 2nd shielding part 23B provided. The first shielding part 23A and the second shielding part 23B are each formed in a shallow rectangular container shape with a peripheral frame 25 surrounding the opening edge of the switching groove 15 and a closed wall 26 closing the outer surface of the peripheral frame 25. A partition wall 27 is formed on the inner surface of the surrounding frame 25 of the shielding portions 23A and 23B to prevent foreign matter from entering. By providing the partition wall 27, the space surrounded by the peripheral frame 25 is vertically divided by the partition wall 27. The partition wall 27 is provided to prevent intrusion of debris and foreign matter, details of which will be described later.

  The peripheral frame 25 is formed continuously with the U-shaped connecting portion 22, and the outer width B1 of the end surface is set slightly larger than the opening width B2 of the switching groove 15 (see FIG. 8). Specifically, the outer half of the end face of the peripheral frame 25 protrudes from the opening edge of the switching groove 15, and the inner half of the end face of the peripheral frame 25 faces the opening face of the switching groove 15. Thus, the sliding contact resistance between the peripheral frame 25 and the cover 11b when the switch knob 10 is switched is reduced while closing the opening surface of the switching groove 15 with the upper and lower peripheral frames 25 in the entire stroke range of the switch knob 10. be able to. The previous wing wall 21 is projected so as to surround the periphery of the peripheral frame 25, and the outer surface thereof is flush with the closing wall 26.

  As shown in FIGS. 5 and 6, the grip 2 is formed in a hollow body by joining a pair of left and right cases 2a and 2b divided into left and right, and a slide switch 9 is provided on the inner surface of the left and right cases 2a and 2b. An assembly seat 29 for positioning and fixing, a guide wall 30 that slides and guides the wing wall 21 in cooperation with the slide recess 31, and a slide recess 31 that accommodates the switch knob 10 on the outer surface of the case. The slide recess 31 is formed in a bullet shape like the operation unit 20, but the vertical dimension is set larger by the vertical stroke of the operation unit 20. A slide groove 32 that allows the switch knob 10 to slide up and down is notched in the slide recess 31 on the left case 2a side. The left and right cases 2a and 2b are integrated so as not to be separated by screwing screws 33 into the screw bosses 2c provided above and below the case inner surface from the outer surface of the case (see FIG. 5).

  In the state where the slide switch 9 and the switch knob 10 are assembled between the left and right cases 2a and 2b, the slide switch 9 is clamped and fixed by a pair of left and right mounting seats 29, and the wing wall 21 is slid into the slide recess as shown in FIG. The inner wall 31 and the guide wall 30 are guided and supported so as to slide up and down. In this assembled state, the outer surfaces of the blade wall 21 and the closing wall 26 are retained by the inner wall of the slide recess 31. The connecting portion 22 is externally engaged with the operation protrusion 16 of the slider 12, and the end surface of the peripheral frame 25 is in contact with the surface of the cover 11b.

  By sliding the switch knob 10 upward from the off position at the lower end shown in FIG. 1, the slide switch 9 is switched in the order of low-temperature air, low-temperature air, and high-temperature air. The heat generation temperature of 5 can be changed to large or small. FIG. 7 shows a state where switching to the hot air position is performed. Thus, when the slide switch 9 is slid, the switch knob 10 is engaged with the sliding contact surface between the slide recess 31 and the operation unit 20 in order to restrict the switch knob 10 from moving or tilting in a direction crossing the sliding direction. A mating groove 36 and a projection 35 are provided. In this embodiment, the projection 35 is provided in the slide recess 31 and the vertical groove 36 is provided in the inner surface of the operation unit 20. The operation unit 20 is also restricted from moving or tilting in the direction intersecting the sliding direction by the left and right step walls of the slide recess 31.

  According to the above switch structure, the opening surface of the switching groove 15 is covered with the shield 23 in the entire stroke range of the switch knob 10, and debris and foreign matter fit into the switching groove 15 of the slide switch 9, or the switching groove 15. From entering the inside of the housing 11 can be reliably prevented. When the switch knob 10 is in the off position, the switching groove 15 is closed by the first shield 23 </ b> A and the peripheral wall of the connecting portion 22. From this state, when the switch knob 10 is slid to the low cold air position or the low warm air position, the switching groove 15 is blocked by the first shield 23A and the second shield 23B, and the first position is low in the low warm air position. 2 The closed area by the shield 23B is larger than the closed area by the first shield 23A. When the switch knob 10 is switched to the hot air position, the switching groove 15 is blocked by the second shield 23 </ b> B and the peripheral wall of the connecting portion 22.

  In the state where the switch knob 10 is switched to the hot air position, as shown in FIG. 7, the upper half portion of the first shield 23 </ b> A protrudes from the upper end of the housing 11, but the partition wall 27 is positioned closer to the upper end of the housing 11. Since the lower half of the peripheral frame 25 is closed, debris and foreign matter do not enter the switching groove 15 at the hot air position. In the state where the switch knob 10 is returned to the off position, the lower half portion of the second shield 23B protrudes from the lower end of the housing 11 as shown in FIG. 1, but the partition wall 27 is similarly positioned closer to the lower end of the housing 11. Since the upper half of the peripheral frame 25 is closed, no debris or foreign matter enters the switching groove 15 at the off position.

  The shielding part 23 can be formed separately from the switch knob 10. In that case, for example, as shown in FIG. 9, the shielding portion 23 is formed in a U-shaped frame shape, and the arms 40 at the upper and lower ends are engaged and connected to the wing wall 21, and the switch is performed by the shielding wall 41 that is in sliding contact with the cover 11b. In the entire stroke range of the knob 10, the opening surface of the switching groove 15 is closed by the shielding portion 23. The shielding wall 41 has an opening 42 through which the operation protrusion 16 is inserted. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted.

  In addition to the above-described embodiments, the switch structure of the present invention can be applied to small electric devices other than hair dryers, and can also be applied to a slide-switching switch structure in which a power source is simply switched on and off. The assembly position of the switch structure can be incorporated in an arbitrary position such as a main body case. Further, the slide switch 9 need not be arranged in a vertically long posture, and can be arranged in a horizontally long posture or an inclined posture. The connecting portion 22 does not need to be formed in a square frame shape, and may have a circular cross section or an oval shape depending on the shape of the operation protrusion 16. The partition walls 27 can be formed at a plurality of locations inside the peripheral frame 25 as necessary.

It is a vertical side view of a switch structure. It is a side view of a hair dryer. It is a disassembled perspective view of a switch structure. It is a front view of the switch structure applied to the hair dryer. It is an exploded front view of a switch structure and its mounting structure. It is the sectional view on the AA line in FIG. It is a vertical side view of the state which switched the switch knob. It is the BB sectional view taken on the line in FIG. It is a vertical side view which shows another Example of switch structure.

Explanation of symbols

2 Grip (case body)
DESCRIPTION OF SYMBOLS 9 Slide switch 10 Switch knob 11 Housing 12 Slider 15 Switching groove 16 Operation protrusion 20 Operation part 21 Wing wall 22 Connection part 23 Shielding body 23A 1st shielding body (1st shielding part)
23B 2nd shielding body (2nd shielding part)

Claims (7)

A slide switch (9) is disposed inside the case body (2), and a switch knob (10) for switching the slide switch (9) is provided on the outer surface of the case body (2).
The slide switch (9) includes a housing (11) and a slider (12) accommodated in the housing (11), and a switching groove (15) is opened on the outer surface of the housing (11) facing the switch knob (10). The operation protrusion (16) of the slider (12) protrudes from the switching groove (15) to the outer surface of the housing (11).
The switch knob (10) includes an operation portion (20) exposed on the outer surface of the case body (2) and a connection portion (22) provided on the inner surface side of the case body (2) and engaged with the operation protrusion (16). ) And a shield (23) covering the opening surface of the switching groove (15),
In the entire stroke range of the switch knob (10), the switching groove (15) is closed in a state where the shield (23) is in sliding contact with the opening peripheral wall of the switching groove (15),
An electric device in which the shield (23) is formed in a rectangular container shape with a peripheral frame (25) surrounding the opening edge of the switching groove (15) and a closed wall (26) closing the outer surface of the peripheral frame (25). Switch structure. The connecting portion (22) formed as a recess is engaged and connected in a state of being externally fitted to the operation protrusion (16) of the slider (12),
The first shield part (23A) provided continuously on one side in the sliding direction of the connecting part (22) and the second provided continuously on the other side in the sliding direction of the connecting part (22). The switch structure for an electric device according to claim 1, comprising a shielding portion (23 </ b> B).   The outer surface (B1) of the end face of the peripheral frame (25) is set to be larger than the opening width (B2) of the switching groove (15), and the end face of the peripheral frame (25) that defines the outer width (B1) 3. The switch structure for an electric device according to claim 1, wherein a peripheral frame is formed so as to extend along an opening edge of the switching groove defining the opening width. The slider (12) is supported by the housing (11) so as to be able to slide back and forth between the off position and a plurality of on positions.
A partition wall (27) that slides into contact with the housing (11) and prevents entry of foreign substances at the stroke end of the switch knob (10) at the off position side and the on position side is a frame around both shielding portions (23A and 23B). 3. The switch structure for an electric device according to claim 2 , wherein the switch structure is formed on an inner surface of the electric device. The first shield part (23A) provided continuously on one side in the sliding direction of the connecting part (22) and the second provided continuously on the other side in the sliding direction of the connecting part (22). It is composed of a shielding part (23B),
The blade wall (21) that is retained by the inner wall of the case body (2) is formed around the first shielding portion (23A) and the second shielding portion (23B) so as to protrude. The switch structure of the electrical equipment in any one.   The sliding contact surfaces of the case body (2) and the switch knob (10) are engaged with each other to slide the switch knob (10), and the switch knob (10) does not move in a direction crossing the sliding direction. The switch structure for an electric device according to any one of claims 1 to 5, wherein a groove (36) and a protrusion (35) are formed to restrict tilting. The first shielding portion (23A), and a second shielding portion closing wall (26) of (23B) is according to any one of claims 2, 4, 5 on the inner surface wall of the case body (2) it is then retaining held Switch structure for electrical equipment.

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