TWI576218B - Pneumatic tools for sequential firing trigger devices - Google Patents

Description

Sequential firing trigger device for pneumatic tools

The present invention relates to a sequential firing trigger device, and more particularly to a sequential firing trigger device for a pneumatic tool.

Referring to FIG. 1 and FIG. 2, a conventional pneumatic tool 1 mainly comprises a casing 11, a valve stem 12 disposed on the casing 11 and used to control the airflow to complete the nailing action, and is forced to a pressure along the machine. A safety member 13 of the housing 11 is displaced, a trigger 14 pivotally coupled to the valve housing 12, and an operating member 15 pivotally coupled to the trigger 14.

When the safety member 13 is displaced along the casing 11 by a pressure, and the one end portion of the operating member 15 is stabilized at a fixed position, the trigger 14 can be rotated only by pressing the trigger 14 with respect to the valve stem 12. The other end of the operating member 15 urges the valve stem 12 to control the air flow to complete the nailing action. At the same time, the casing 11 bounces due to the reaction force generated during the nailing, so that the operating member 15 forms a misalignment relationship with the safety member 13 during the reciprocating displacement of the safety member 13 during the bounce. In the case where the operating member 15 is freely rotatable, even if the trigger 14 is pressed, no further firing is performed. Work.

However, when the reaction force is small and the spring bounce is small, the operating member 15 may not be able to disengage from the safety member 13 and maintain the forced relationship with the safety member 13. At this time, if the user When the trigger 14 is released, the valve stem 12 completes a gas circulation. Therefore, when the user accidentally touches the trigger 14, the nailing operation is performed again under the unintended condition, and the workpiece is not easily nailed. And will form a security concern.

A pneumatic tool capable of sequential firing, such as in U.S. Patent No. 7,322,426 (or U.S. Patent No. 7,433,918), which is different from the present invention and the prior art sequential firing (clicking), see No. 7322426 FIG. 3 to FIG. 8 (hereinafter referred to as the label of the aforementioned patent application) are mainly provided with a mode selection member which is disposed inside a trigger member 32 and is capable of providing a biasing force through the spring 72 and displacement relative to the operating member 50. 48 and an actuating member 46. Thereby, in the order in which the operating member 50 and the triggering member 32 are operated, as shown in FIG. 8 and FIG. 9 , the continuous firing state can be automatically entered, or in the click-on state of FIGS. 4 to 7 . When the actuating member 46 is engaged with the operating member 50 (as shown in FIG. 7), the trigger member 32 can no longer be pivoted relative to the actuator 28 before the operating member 50 is returned to the original position after one firing operation. .

However, in the case of the No. 7322426 case, in order to cooperate with the continuous firing/clicking mode, the operating member 50 requires an additional processing of a recess 51, the mode selecting member 48 requires an additional processing of an opening 70, and the actuating member 46 requires an additional processing. Convex 54, not only The design is quite complicated, and the difficulty of processing is also improved. What is important is that the design of the mode selection member 48 and the movable member 46 can be worn.

Accordingly, it is an object of the present invention to provide a sequential firing trigger device that can improve the handling and safety of a pneumatic tool.

Thus, the pneumatic tool comprises a casing, a valve stem movably disposed in the casing and configured to control the airflow to complete the nailing action, and a safety member movably disposed on the casing, the safety component The operation is displaced from a secured position away from the valve stem to a disarmed position adjacent the valve stem, the sequential firing trigger device comprising: a trigger, an operating member, and an abutment member.

The trigger is pivotally coupled to the housing and is rotatable relative to the housing between a non-trigger position and a trigger position.

The operating member is pivotally connected to the trigger and includes a contact portion.

The abutting member is pivotally connected to the trigger, and when the safety member is in the secured position and the trigger is in the non-fired position, the operating member is located on a moving path of the safety member to the unsecured position.

Wherein, when the trigger is in the trigger position, and then the safety member is displaced from the safety position to the release position, the operating member, the abutting member and the safety member are misaligned, so that the operating member cannot press the valve stem Displacement, unable to complete the nailing Work.

When the safety member is in the disengaged position, and then the trigger is swung from the non-trigger position to the trigger position, the touch portion of the operating member is driven by the trigger to press the valve stem to displace the nail to complete the nailing action. And the abutting member abuts the safety member when the trigger is to be disengaged from the trigger position, so that the trigger cannot swing toward the trigger position.

The effect of the invention is that the positional change of the abutting member and the operating member is used to achieve the purpose of sequential firing, and the trigger can not be opposite after a nailing action and before the safety member releases the operating member. The valve stem swings without accidentally touching the trigger to perform the nailing action again, thereby improving handling and safety.

2‧‧‧ pneumatic tools

21‧‧‧Chassis

22‧‧‧ valve stem

23‧‧‧Insurance

231‧‧‧ side

232‧‧‧ side

3‧‧‧ Trigger

31‧‧‧ First pivot

32‧‧‧ First pivot

4‧‧‧Operating parts

41‧‧‧Axis

42‧‧‧Force

43‧‧‧Touching

5‧‧‧Parts

51‧‧‧Axis

52‧‧‧Abutment

521‧‧‧Abutment

522‧‧‧ card resistance surface

6‧‧‧ pivot

7‧‧‧First elastic element

8‧‧‧Second elastic element

9‧‧‧ Third elastic element

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a cross-sectional view showing that an operating member of a conventional pneumatic tool is forced by a safety member and forced by a trigger Pressing a valve stem to complete the nailing action; FIG. 2 is a cross-sectional view showing the operating member of the pneumatic tool misaligned with the safety member; FIG. 3 is a cross-sectional view showing an embodiment of the sequential firing trigger device of the present invention installed in a Pneumatic tool Figure 4 is an exploded perspective view of the embodiment; Figure 5 is a perspective assembled view of the embodiment; Figure 6 is a cross-sectional view showing a trigger in a trigger position in the embodiment, and a fuse is insured When the position is displaced to a disengaged position, it is displaced from an operating member and a top abutting member; FIG. 7 is a cross-sectional view showing that the securing member is in the unsecured position and the trigger is displaced by a non-trigger position. When the trigger position is reached, the operating member presses the valve stem to complete the nailing action; FIG. 8 is a cross-sectional view showing the topping member swinging to the top against the safety member in the embodiment; and FIG. 9 is a cross-sectional view It is stated that the top contact is maintained at the trigger position in this embodiment.

Referring to Figures 3, 4 and 5, an embodiment of the sequential firing trigger device of the present invention is mounted to a pneumatic tool 2. The pneumatic tool 2 includes a casing 21, a valve stem 22 movably disposed in the casing 21 for controlling the airflow to complete the nailing action, and a safety member 23 movably disposed on the casing 21. The safety member 23 is operable to be displaced from a secured position (Fig. 3) remote from the valve stem 22 to a disengaged position adjacent the valve stem 22 (Figs. 6-9) and includes an adjacent side 231 and the other side 232. The sequential firing trigger device comprises: a trigger 3, a The operating member 4, a top abutting member 5, a pivot shaft 6, a first elastic member 7, a second elastic member 8, and a third elastic member 9.

The trigger 3 includes a first pivot portion 31 pivotally connected to the casing 21 and a second pivot portion 32 remote from the casing 21. The second pivot portion 32 can be centered on the first pivot portion 31 and pivoted relative to the casing 21 between a non-trigger position (as shown in FIG. 3) and a trigger position (FIG. 6, FIG. 8 and FIG. 9). .

The operating member 4 is pivotally connected to the second pivot portion 32 of the trigger 3 and includes a pivot portion 41 pivotally connected to the trigger 3, opposite to the pivot portion 41 and centered on the pivot portion 41 An abutting portion 42 of the swing pendulum is interposed between the shaft pivot portion 41 and the abutting portion 42 and corresponds to a contact portion 43 of the valve stem 22.

The abutting member 5 is pivotally connected to the second pivot portion 32 of the trigger 3 and includes a shaft pivot portion 51 pivotally connected to the trigger 3, and opposite to the shaft pivot portion 51 and capable of pivoting the shaft portion 51. It can be used to pivot against a top abutment 52 of the safety member 23 for centering. The abutting portion 52 has an adjacent abutting surface 521 and a blocking surface 522.

The pivot shaft 6 pivots the trigger 3, the pivot portion 41 of the operating member 4, and the pivot portion 51 of the abutting member 5.

The first elastic member 7 is a torsion spring in the present embodiment and is disposed between the trigger 3 and the casing 21 and generates a biasing force that constantly causes the trigger 3 to swing toward the non-trigger position. Preferably, the first elastic member 7 is disposed coaxially with the first pivot portion 31 of the trigger 3.

The second elastic member 8 is a spring piece in the embodiment, and is disposed between the trigger 3 and the operating member 4, and is configured to constantly rotate the contact portion 43 of the operating member 4 away from the valve stem 22. A partial pressure.

The third elastic member 9 is a torsion spring in the embodiment, and is disposed between the trigger 3 and the abutting member 5, and is generated such that the top abutting portion 52 of the abutting member 5 faces away from the valve stem. A biasing force in the 22-direction swivel.

Preferably, the second elastic member 8 and the third elastic member 9 are coaxially disposed with the second pivot portion 32 of the trigger 3.

When the sequential firing trigger device of the present invention is in a normal state, as shown in FIG. 3, the safety member 23 is located at the securing position away from the valve stem 22, and the trigger 3 is in the non-trigger position, the operating member 4 is pressed. The portion 43 is also remote from the valve stem 22 from the abutment portion 52 of the abutment member 5. At this time, the abutting portion 521 of the abutting portion 42 of the operating member 4 and the abutting portion 52 of the abutting member 5 is located on a moving path of the securing member 23 to the unsecured position, adjacent to the securing member 22 Side 231.

Referring to FIG. 3 and FIG. 6, when the user first touches the trigger 3, the non-trigger position is swung to the trigger position in the direction indicated by the arrow A in FIG. 6, and then the safety member 23 is forced to a workpiece (Fig. When the safety position is displaced to the release position according to the direction indicated by the arrow B in the figure, since the trigger 3 is moved to the trigger position, the abutting portion 42 of the operating member 4 is also linked at the same time. The top abutting portion 52 of the abutting member 5 is offset from the moving path of the securing member 23, so that the safety member 23 is moved to the release After the dangerous position, the abutting portion 42 of the operating member 4 and the abutting surface 521 of the abutting portion 52 of the abutting member 5 are misaligned with the securing member 23. At this time, since the abutting portion 42 of the operating member 4 and the trigger portion 43 can be swung around the pivot portion 41, when the trigger portion 43 contacts the valve stem 22, the valve stem 22 is used. When the ejector is pushed and moved away from the valve stem 22, the valve stem 22 is not forced to be displaced, so that the nailing operation cannot be performed.

Referring to FIG. 7 and FIG. 8, when the safety member 23 is first forced to the workpiece, it is displaced to the release position in the direction indicated by the arrow A in FIG. 7, and then the trigger 3 is shown by the arrow B in FIG. When the direction is swung from the non-trigger position to the trigger position, the abutting portion 42 of the operating member 4 abuts against the abutting portion 52 of the abutting member 5 when the securing member 23 moves to the releasing position. The face 521 is pushed up by the side 231 of the securing member 23 and is swung up and close to the valve stem 22, so that the touch portion 43 of the operating member 4 will follow during the movement of the trigger 3 to the firing position. The trigger 3 is swung to press the valve stem 22 in the direction indicated by the arrow C in Fig. 8 (displaced in the opposite direction to the arrow B) to complete the nailing action. At the same time, the abutment surface 521 of the abutting portion 52 of the abutting member 5 may change due to the position of the trigger 3, and the length of the pivot portion 51 to the abutting portion 52 is shorter than the axis of the operating member 4. The length of the arm portion 41 to the urging portion 42 is separated from the side surface 231 of the securing member 23, and at this time, the abutting member 5 is opposite to the swinging direction of the operating member 4 to be opposite to the operating member 4. In the direction of the swing, it is swung out of the safety member 23 and is displaced from the safety member 23 (Fig. 8).

Referring to FIG. 9, at this time, the blocking surface 522 of the abutting portion 52 of the abutting member 5 is 522. Corresponding to the side 232 of the securing member 23, and as the trigger 3 is intended to disengage from the triggering position, against the side 232 of the securing member 23, the trigger 3 is maintained in the triggered position. Therefore, if the next nailing operation is to be performed, the pneumatic tool 2 must be lifted in the direction opposite to the workpiece, and the safety member 23 is released to be reset to the position of the safety member before the trigger 3 can be released to the non-trigger position. And the nailing action is performed sequentially.

Through the above description, the advantages of the foregoing embodiments can be summarized as follows:

1. The present invention can utilize the positional change of the abutting member 5 and the operating member 4, restricting the user from having to press the safety member 23 first, then pressing the trigger 3, releasing the safety member 23, and releasing the trigger 3 In order to complete a nailing procedure and the next nailing action. Thereby, the purpose of the sequential firing is achieved, and it is ensured that the trigger 3 can no longer swing relative to the valve stem 22 after a nailing operation and before the safety member 23 releases the operating member 4, without accidentally touching the valve. The trigger 3 performs the nailing operation again, thereby improving the handling and safety of use.

2. The operating member 4 and the abutting member 5 of the present invention are all of a plate type design, which is not only simple in structure, easy to process, but also coaxially rotated at a fixed position, which can reduce the degree of wear and prolong the service life.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

2‧‧‧ pneumatic tools

21‧‧‧Chassis

22‧‧‧ valve stem

23‧‧‧Insurance

231‧‧‧ side

232‧‧‧ side

3‧‧‧ Trigger

32‧‧‧ First pivot

4‧‧‧Operating parts

42‧‧‧Force

43‧‧‧Touching

5‧‧‧Parts

52‧‧‧Abutment

521‧‧‧Abutment

31‧‧‧ First pivot

522‧‧‧ card resistance surface

Claims (10)

A sequential firing trigger device for a pneumatic tool, the pneumatic tool comprising a casing, a valve stem movably disposed in the casing and configured to control the airflow to complete the nailing action, and a movably disposed on the casing a safety member operable to be displaced from a secured position away from the valve stem to a disarmed position adjacent the valve stem, the sequential firing trigger device comprising: a trigger pivotally coupled to the housing, and Being rotatable relative to the casing between a non-trigger position and a trigger position; an operating member pivotally coupled to the trigger and including a contact portion; and a top abutting member pivotally coupled to the trigger The safety member is located at the safety position and the trigger is located in the non-fired position, and the operating member is located on the movement path of the safety member to the unsecured position; wherein the trigger is first located at the trigger position, and then the insurance When the piece is displaced from the safety position to the release position, the operating member, the abutting member and the safety member are displaced, so that the operating member cannot press the valve stem displacement. The nailing action cannot be completed. When the safety member is first located in the release position, and then the trigger is swung from the non-trigger position to the trigger position, the touch portion of the operating member is driven by the trigger to press the valve stem. Displacement to complete the nailing action, and the abutting member abuts the safety member when the trigger is to be disengaged from the trigger position, such that the trigger cannot swing toward the non-trigger position. A sequential firing trigger device for a pneumatic tool according to claim 1, wherein the operating member further includes a pivot portion pivotally coupled to the trigger, and a phase a pressing portion opposite to the pivot portion and pivotable about the pivot portion of the shaft, the touch portion is interposed between the pivot portion and the pressing portion, and the pressing portion is at the safety member When the safety position is located and the trigger is in the non-fired position, the movement path is located in the safety member. A sequential firing trigger device for a pneumatic tool according to claim 2, further comprising a second elastic member disposed between the trigger and the operating member and generating a constant abutment portion of the operating member A biasing force that swings away from the valve stem. The sequential firing trigger device of the pneumatic tool of claim 2, wherein the abutting member comprises a pivot portion pivotally connected to the trigger, and opposite to the pivot portion of the abutting member The pivot portion is a top abutting portion of the center pivoting portion, and the top abutting portion is located at the securing member when the securing member is in the securing position and the trigger is in the non-fired position On the path. The sequential firing trigger device of the pneumatic tool of claim 4, further comprising a third elastic member disposed between the trigger and the top member and generating a top for the top member The biasing portion is biased toward a direction away from the valve stem. The sequential firing trigger device of the pneumatic tool of claim 4, further comprising a pivot that pivots the trigger, the pivot portion of the operating member, and the pivot portion of the abutting member. The sequential firing trigger device of the pneumatic tool of claim 4, wherein the abutting portion has an adjacent abutting surface and a latching surface, the abutting surface being located at the securing member Position and the trigger has not been When the non-trigger position is swung to the trigger position, it abuts against a side of the safety member, the abutment surface is located at the release position, and then the trigger is swiveled from the non-trigger position to the trigger position. When it is swung out of the safety member, and the engagement surface is against the other side of the safety member when the trigger is disengaged from the trigger position, the trigger cannot be swung toward the trigger position. The sequential firing trigger device of the pneumatic tool of claim 7, wherein when the abutting surface of the abutting portion is disengaged from the securing member, the abutting member is swung in a direction opposite to the swinging direction of the operating member . The sequential firing trigger device of the pneumatic tool of claim 8, wherein the length of the pivoting portion of the abutting member to the abutting portion is shorter than the length of the pivoting portion of the operating member to the abutting portion. A sequential firing trigger device for a pneumatic tool according to claim 1, further comprising a first elastic member disposed between the trigger and the casing and generating a constant rotation of the trigger toward the non-trigger position A partial pressure of the pendulum.