Trigger switch
The trigger switch design with a sealing covering member addresses the inspection challenge of external packing concealment, enhancing dust and water resistance while enabling easy inspection and trigger replacement.
Patent Information
- Authority / Receiving Office
- KR · KR
- Patent Type
- Patents
- Current Assignee / Owner
- OMRON CORP
- Filing Date
- 2023-12-08
- Publication Date
- 2026-07-21
Smart Images
Figure 112023137992651-PAT00004_ABST
Abstract
Description
Technology Field
[0001] The present invention relates to a trigger switch having a trigger that accepts a pressing operation. Background Technology
[0002] For example, a trigger switch used for controlling power tools comprises a trigger that accepts a pressing operation, a shaft member that supports the trigger at one end, and a case having a through hole through which the other end of the shaft member passes. In a trigger switch configured in this way, the shaft member moves inward into the case in response to a pressing operation on the trigger, and returns to its original position when the pressing operation is released. Due to the reciprocating motion of the shaft member, the trigger switch generates a breathing motion in which the air pressure inside the case changes. If foreign substances such as external moisture, dust, or outside air are inhaled due to this breathing motion, there is a risk that it may lead to abnormalities such as a malfunction of the trigger switch.
[0003] In order to increase dust resistance and water resistance, for example, Patent Document 1 discloses a trigger switch for a power tool that has increased dust resistance and water resistance by providing an external packing in the shape of a corrugated tube, in which the tip portion is engaged with the trigger and the base portion is engaged with the case. Prior art literature
[0004] Patent Document 1: Specification of Japanese Patent No. 5898993 The problem to be solved
[0005] However, the trigger switch for power tools disclosed in Patent Document 1 has a problem in that it is difficult to inspect the fit state because, since the external packing is fitted to the trigger, the part of the packing fitted is hidden from the trigger after the packing is assembled.
[0006] The present invention has been made in consideration of these circumstances and aims to provide a trigger switch capable of easily inspecting the bonding state of a coating member. means of solving the problem
[0007] To solve the above problem, the trigger switch of the present disclosure comprises a trigger that accepts a pressing operation, a shaft member that supports the trigger at one end, and a case having a through hole formed therein through which the other end of the shaft member passes. The trigger switch, wherein the shaft member moves inward into the case in accordance with a pressing operation on the trigger, further comprises a covering member that covers the shaft member in a circumferential direction to seal the inside and is axially expandable, wherein the covering member is characterized in that one end is coupled to the outer circumference of the shaft member and the other end is coupled around the through hole of the case.
[0008] In addition, the trigger switch is characterized in that a fitting fixing part is formed on the outer surface of the shaft member, and one end of the covering member is fitted and fixed to the fitting fixing part formed on the shaft member.
[0009] In addition, the trigger switch further comprises a return spring that wraps around the shaft member on the outside of the case and biases the shaft member in the opposite direction to the pressing direction, and the covering member is coupled to cover the return spring that wraps around the shaft member on the outside of the case.
[0010] In addition, the trigger switch is characterized in that the trigger is capable of being coupled and separated with respect to one end of the shaft member. Effects of the invention
[0011] The trigger switch of the present disclosure has a covering member for sealing, one end of which is coupled to the outer circumference of a shaft member, and the other end of which is coupled to the area around a through hole formed in a case. Accordingly, the trigger switch of the present disclosure exhibits excellent effects, such as facilitating inspection of the coupling state before coupling the trigger. Brief explanation of the drawing
[0012] [Fig. 1] This is a schematic perspective view illustrating an example of the appearance of a trigger switch of the present invention. [Fig. 2] This is a schematic exploded perspective view illustrating an example of a trigger switch of the present invention. [Fig. 3] This is a schematic side view illustrating an example of a trigger switch of the present invention. [Fig. 4] This is a schematic cross-sectional view illustrating a partial example of a trigger switch of the present disclosure. [Fig. 5] This is a schematic perspective view illustrating an example of the assembly process of a trigger switch according to the present disclosure. [Fig. 6] This is a schematic perspective view illustrating an example of the assembly process of a trigger switch according to the present invention. [Fig. 7] This is a schematic perspective view illustrating an example of the assembly process of a trigger switch according to the present invention. [Fig. 8] This is a schematic perspective view illustrating an example of the assembly process of a trigger switch according to the present invention. [Fig. 9] This is an explanatory diagram conceptually illustrating an example of trigger exchange of the trigger switch of the present invention. Specific details for implementing the invention
[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0014] <Application Example>
[0015] The trigger switch described herein is applied to various electric devices, including electric tools such as electric drills, electric screwdrivers, electric wrenches, and electric grinders, which are equipped with a driving part such as a motor. In the following embodiments, such a trigger switch (TS) will be described by way of example with reference to the drawings.
[0016] <Structural Example>
[0017] FIG. 1 is a schematic perspective view illustrating an example of the external appearance of a trigger switch (TS) of the present invention. FIG. 1 illustrates the external appearance of a trigger switch (TS) that can be assembled to a power tool, viewed from a diagonal upward perspective. The trigger switch (TS) is a switch operated by a user of a power tool and is equipped with a trigger (1) that the user presses. By the user pressing the trigger (1) of the trigger switch (TS), a driving unit (not shown), such as an electric motor built into the power device, is driven. The trigger switch (TS) is equipped with a case (2) assembled to the power device, a trigger (1), a shaft member (3) (see FIG. 2, etc.) connecting the trigger (1) and the case (2), a return spring (4) (see FIG. 2, etc.) that biases the trigger (1), and a covering member (5) that covers the shaft member (3). Additionally, the trigger switch (TS) is equipped with a switching lever (6) that switches the driving direction of the drive unit, for example, the rotation direction of the electric driver, forward or reverse. In the following description, regarding the direction of the trigger switch (TS), the side where the trigger (1) is attached is described as front, the side of the case (2) as back, the side of the switching lever (6) as up, and the side opposite the switching lever (6) as down; however, these directions are for convenience of explanation and do not limit the direction when using the trigger switch (TS).
[0018] FIG. 2 is a schematic exploded perspective view illustrating an example of a trigger switch (TS) of the present disclosure. FIG. 3 is a schematic side view illustrating an example of a trigger switch (TS) of the present disclosure. FIG. 4 is a schematic cross-sectional view illustrating a part example of a trigger switch (TS) of the present disclosure. FIG. 3 is illustrated with a part of the trigger (1) and case (2) separated so that the interior of the trigger switch (TS) can be seen. FIG. 4 is a schematic cross-sectional view illustrating the front part of the trigger switch (TS) shown at the viewpoint in the direction of the arrow, with the cross-section passing through line segment AB shown in FIG. 1. The trigger switch (TS) is formed using members such as a trigger (1), case (2), shaft member (3), return spring (4), covering member (5), and switching lever (6).
[0019] The trigger (1) is a component that accepts a user's pressing operation. The front surface of the trigger (1) is shaped so that the user hooks their finger when operating it. The trigger (1) is supported at the front end (one end side) of a rod-shaped shaft member (3). The trigger (1) is fitted into the front end of the shaft member (3) and can be connected to and disconnected from the front end of the shaft member (3).
[0020] The case (2) is a hollow case forming a roughly rectangular prism, with one open side closed by a flat cover (20). A circuit (not shown) formed on a substrate is arranged on the inner side of the cover (20). Additionally, in FIG. 3, the cover (20) is shown in a separated state. A roughly circular through hole (21) is formed on the front of the case (2), and the rear end (other end) of the shaft member (3) passes through it. The periphery of the through hole (21) protrudes forward in a cylindrical shape. A switching lever (6) is attached to the upper surface of the case (2). The interior of the case (2) is divided into a lower chamber (22) and an upper chamber (23) in two upper and lower sections. An opening / closing mechanism (24) is housed in the lower part (22) of the case (2), and a switching mechanism (25) is housed in the upper part (23). The opening / closing mechanism (24) is a mechanism that controls the driving unit by opening and closing a circuit formed on a substrate. The opening / closing mechanism (24) is coupled to the rear end of the shaft member (3) and moves back and forth according to the movement of the shaft member (3). The driving unit operates when the opening / closing mechanism (24) moves backward, and the driving unit stops when the opening / closing mechanism (24) returns to the front. The switching mechanism (25) is a mechanism that switches the wiring of the circuit that is opened / closed by the opening / closing mechanism (24). The switching mechanism (25) is coupled to the switching lever (6) and operates according to the oscillation of the switching lever (6). The direction of operation of the driving unit is switched by the operation of the switching mechanism (25).
[0021] The shaft member (3) is a rod-shaped plunger, with a trigger (1) attached to the front end, which is one end, and the rear end, which is the other end, extends through a through hole (21) formed on the front surface of the case (2) and into the interior of the case (2). The front end of the shaft member (3) is formed in a shape that is roughly cut into an arch shape so as to insert the trigger (1) in the appropriate direction. On the outer surface near the front end of the shaft member (3), a fitting fixing part (30) for inserting a covering member (5) is formed. The fitting fixing part (30) is formed as a concave part between annular convex parts formed at the front and back. Among the convex parts forming the fitting fixing part (30), the rear convex part is a locking part (31) that locks the front end of the return spring (4). The rear end of the shaft member (3) has a connecting part (32) formed therein for connecting an opening / closing mechanism (24) housed within the case (2). The connecting part (32) is formed as a groove that rotates around the outer surface of the shaft member (3). The shaft member (3) moves forward and backward in the axial direction according to the forward and backward movement of the trigger (1).
[0022] The return spring (4) is formed using a spring such as a compression coil spring. The return spring (4) wraps around the shaft member (3) in a circumferential direction on the outside of the case (2), biases the shaft member (3) forward in the direction opposite to the pressing direction, and returns the shaft member (3), which was pressed backward together with the trigger (1), to a forward release position. The front end of the return spring (4) is stopped by the stopper (31) of the shaft member (3), and the rear end is stopped by the periphery of the through hole (21) formed on the front of the case (2).
[0023] The covering member (5) is formed in the shape of a roughly cylindrical corrugated tube and covers the shaft member (3) and the return spring (4) in the circumferential direction on the outside of the case (2). The front end, which is one end of the covering member (5), is connected in a state where it is fitted into the fitting fixing part (30) formed on the outer circumference of the shaft member (3). The rear end, which is the other end of the covering member (5), is connected to cover the protruding portion of the periphery of the through hole (21) formed on the front surface of the case (2). The covering member (5) is a packing formed using a material such as rubber that has flexibility and sealing properties, and is stretched in the axial direction to seal the inside.
[0024] The switching lever (6) is a member that receives a switching operation from the user to switch the driving direction of the driving unit and moves left and right, and transmits the oscillating motion to the switching mechanism (25). Also, when the switching lever (6) is operated to be positioned in the middle of the oscillating range, the switching lever (6) functions as a stopper that prevents a pressing operation on the trigger (1).
[0025] The trigger switch (TS) configured as described above is assembled into a power device, such as a power tool, and accepts user operation. A user of the power device performs operations such as a pressing operation to press the trigger (1) or a switching operation to move the switching lever (6). The trigger (1) that accepts the pressing operation moves backward. As the trigger (1) moves backward, the shaft member (3) coupled to the trigger (1) moves backward. As the shaft member (3) moves backward, the opening / closing mechanism (24) coupled to the rear end of the shaft member (3) moves backward, and the driving unit is driven. Also, as the shaft member (3) moves backward, the lower return spring (4) and the covering member (5) are compressed in the axial direction.
[0026] When the user stops the drive unit, the user releases the press of the trigger (1). As the press is released, the return spring (4) biases the shaft member (3) forward. Due to the elastic pressure of the return spring (4), the trigger (1), shaft member (3), and opening / closing mechanism (24) move forward and return to the release position. Additionally, as the shaft member (3) moves forward, the return spring (4) and the covering member (5) extend in the axial direction.
[0027] The trigger switch (TS) of the present invention generates a breathing motion in which the air pressure inside the case (2) changes according to the reciprocating motion of the shaft member (3) back and forth, but since it is sealed by a covering member (5), it prevents the inhalation of foreign substances such as external moisture, dust, and outside air. As such, the trigger switch (TS) of the present invention is structured to have high protective properties, such as dustproof and waterproof properties.
[0028] <Assembly Example>
[0029] Next, the assembly process of the trigger switch (TS) of the present disclosure will be described. FIG. 5 is a schematic perspective view illustrating an example of the assembly process of the trigger switch (TS) of the present disclosure. FIG. 5 illustrates a state in which, as an assembly process, a switching mechanism (25) is housed in an open case (2) in which a cover (20) is not attached, a switching lever (6) is attached from the upper surface of the case (2), and a return spring (4) is attached to the front surface of the case (2).
[0030] FIG. 6 is a schematic perspective view illustrating an example of an assembly process of a trigger switch (TS) of the present disclosure. FIG. 6 illustrates a state in which, in the state exemplified in FIG. 5, an opening / closing mechanism (24) is housed within a case (2), and a shaft member (3) is inserted through a through hole (21) on the front of the case (2) and coupled.
[0031] FIG. 7 is a schematic perspective view illustrating an example of an assembly process of a trigger switch (TS) of the present disclosure. FIG. 7 illustrates a state in which a covering member (5) is combined to cover the shaft member (3) and the return spring (4) in a circumferential direction and seal the interior, as illustrated in FIG. 6. The trigger switch (TS) of the present disclosure can inspect the combined state of the covering member (5) and the sealing state when the shaft member (3) moves, as illustrated in FIG. 7. In addition, as illustrated in FIG. 7, the covering member (5) itself is exposed without a shield such as a trigger (1), thereby improving the efficiency and precision of the inspection.
[0032] FIG. 8 is a schematic perspective view illustrating an example of an assembly process for a trigger switch (TS) of the present disclosure. FIG. 8 illustrates a state in which, in the state exemplified in FIG. 7, a trigger (1) is coupled to the front end of a shaft member (3) and the open side of a case (2) is closed with a cover (20) to complete the trigger switch (TS). The trigger switch (TS) is assembled in this manner.
[0033] <Trigger Exchange Example>
[0034] Next, the replacement of the trigger (1) of the trigger switch (TS) of the present disclosure will be described. FIG. 9 is an explanatory diagram conceptually illustrating an example of the replacement of the trigger (1) of the trigger switch (TS) of the present disclosure. The trigger switch (TS) of the present disclosure allows the trigger (1) to be connected and disconnected with respect to the front end of the shaft member (3). Therefore, as conceptually illustrated in FIG. 9, the trigger switch (TS) of the present disclosure can be mounted in a form that allows the trigger (1) to be replaced by a user even after being assembled into a motor device. Since the front end of the covering member (5) of the trigger switch (TS) of the present disclosure is connected to the shaft member (3) and the rear end is connected to the case (2), the trigger (1) can be replaced without damaging the sealing properties, and thus exhibits excellent effects.
[0035] As described above, the trigger switch (TS) of the present invention exhibits excellent effects, such as being able to increase protection such as dustproof and waterproof properties by sealing it with a covering member (5).
[0036] In addition, the trigger switch (TS) of the present disclosure has one end of the covering member (5) coupled to the outer circumference of the shaft member (3), and the other end coupled to the area around a through hole (21) formed in the case (2). Accordingly, the trigger switch (TS) of the present disclosure can inspect the sealing performance during breathing operation while exposed without a shield such as a trigger (1), and can also verify the connection area of the covering member (5). Therefore, the trigger switch (TS) of the present disclosure exhibits excellent effects, such as facilitating inspection and improving the efficiency and precision of the inspection.
[0037] In addition, the trigger switch (TS) disclosed in the present invention exhibits excellent effects, such as being able to replace the trigger (1) without damaging the sealing properties.
[0038] In addition, the trigger switch (TS) of the present invention exhibits excellent effects, such as being able to miniaturize the case (2) because the return spring (4) is coupled outside the case (2).
[0039] The present invention is not limited to the embodiments described above and may be implemented in various other forms. Accordingly, the embodiments described above are merely examples in all respects and should not be interpreted restrictively. The technical scope of the present invention is defined by the claims and is not bound in any way by the text of the specification. Furthermore, all variations and modifications falling within the equivalent scope of the claims are within the scope of the present invention.
[0040] (Appendix 1)
[0041] A trigger switch comprising a trigger that accepts a pressing operation, a shaft member that supports the trigger at one end, and a case having a through hole formed therein through which the other end of the shaft member passes, wherein the shaft member moves inward toward the case in response to a pressing operation on the trigger.
[0042] The above-mentioned shaft member is covered in a circumferential direction to seal the inside, and further provided with a covering member that is expandable in the axial direction.
[0043] The above-mentioned covering member is,
[0044] One end is connected to the outer circumference of the shaft member, and
[0045] A trigger switch characterized in that the other end is coupled around the through hole of the above case.
[0046] (Appendix 2)
[0047] As a trigger switch described in Appendix 1,
[0048] A fitting fixing part is formed on the outer surface of the above shaft member, and
[0049] A trigger switch characterized in that one end of the above-mentioned covering member is fitted and fixed to a fitting fixing part formed on the above-mentioned shaft member.
[0050] (Appendix 3)
[0051] As a trigger switch described in Booklet 1 or Booklet 2,
[0052] Further comprising a return spring that wraps around the shaft member on the outside of the above case and biases the shaft member in the opposite direction to the pressing direction,
[0053] A trigger switch characterized in that the above-described covering member is coupled to cover the return spring that wraps around the shaft member on the outside of the case.
[0054] (Appendix 4)
[0055] A trigger switch described in any one of Notes 1 to Note 3,
[0056] The above trigger is a trigger switch characterized by being capable of being coupled and separated with respect to one end of the shaft member. Explanation of the symbols
[0057] TS Trigger Switch 1 Trigger 2 cases 20 covers 21 through hole 22 will 23 Loss 24 opening and closing mechanisms 25 switching mechanism 3 shaft members 30 insert fixing part 31 Stop walking 32 connecting part 4 Return Spring 5 Covering member 6-shift lever
Claims
Claim 1 A trigger switch comprising a trigger that accepts a pressing operation, a shaft member that supports the trigger at one end, and a case having a through hole formed therein through which the other end of the shaft member passes, wherein the shaft member moves inward into the case according to a pressing operation on the trigger, further comprising a return spring that wraps around the shaft member on the outside of the case and biases the shaft member in the opposite direction to the pressing direction, and a covering member that covers the shaft member in a circumferential direction to seal the inside and is axially expandable, wherein one end of the covering member is coupled to the outer circumference of the shaft member and the other end is coupled around the through hole of the case, wherein the shaft member has a fitting fixing part formed as a concave portion on the outer surface of the shaft member and a locking part formed by a convex portion constituting a part of the fitting fixing part on one end of the shaft member, wherein one end of the covering member is fitted and fixed to the fitting fixing part, and one end of the return spring A trigger switch characterized by being stopped by the above-mentioned stopper. Claim 2 delete Claim 3 A trigger switch according to claim 1, characterized in that the covering member is coupled to cover the return spring that wraps around the shaft member on the outside of the case. Claim 4 A trigger switch according to claim 1, wherein the trigger is capable of being coupled and separated with respect to one end of the shaft member.