TW201634195A - Insurance device of power nailer - Google Patents

Abstract

The present disclosure provides an insurance device of power nailer. The insurance device includes an adjusting unit, an acting member and an insurance member. The adjusting unit includes a shaft, an adjusting element and a fixing element. The adjusting element disposed on the shaft has a convex portion at one end and a receiving portion at the other end. The fixing element disposed on the shaft includes a first level portion and a second level portion. The acting member connects the fixing element of the adjusting unit and a shooting device of the power nailer. The insurance member is disposed on a shooting port of the power nailer and has an engaging portion correspondently received in the receiving portion. The adjusting element can be rotated so as to be switched between a first position, a second position and a third position. The adjusting element is correspondent to the first level portion and the second level portion at the first position and the second position, respectively. The engaging portion is released from the receiving portion at the third position. Thus, the nail depth can be easily adjusted and the insurance member can be quickly detached from the power nailer.

Description

Power nail gun insurance mechanism

The present invention relates to an insurance mechanism, and more particularly to a power nail gun insurance mechanism.

The advancement of technology has led to the development of technology. Various power tools or automated tools have replaced traditional hand tools, which are widely used in life and enhance the convenience of human society. For example, the use of a power nail gun instead of a shovel can not only speed up the work, but also reduce the burden on the user.

A typical power nail gun includes a firing port, a power unit and a power trigger unit. The following uses the power trigger unit as a trigger as an example. When the user operates the power nail gun, the trigger device can be triggered to trigger the power device to be fired from the firing port. By continuously pressing the trigger, the nail member can be continuously shot, and the operation mode is very simple. However, because of its simple operation and the sharpness of the hitting nails, it is easy to be accidentally hit and cause accidents. Some manufacturers have developed insurance mechanisms for power nail guns to avoid accidents. The insurance mechanism is usually disposed at the firing port of the power nail gun, and has a protruding distance from the firing port, wherein the insurance mechanism can interlock the trigger Switching between an actuatable and an inoperable state, when the user pushes the insurance mechanism inward, the trigger can be linked to an actuatable state, at which time the trigger can be pressed to trigger the power device, and when the insurance institution returns to the pushdown In the front position, the trigger is connected to an inoperable state, and the trigger cannot be buckled, and the accident caused by the accidental touch can be avoided. In addition, the difference in the protruding distance of the insurance mechanism will affect the nailing depth.

Although the above-mentioned insurance mechanism can avoid the danger that the power nail gun is accidentally touched, the conventional insurance mechanism cannot adjust the protruding distance, or even if the mechanism for adjusting the protruding distance is provided, the structure is complicated, difficult to adjust, and unfavorable for manufacturing. Or it is not conducive to adjusting the nailing depth. In addition, most of the insurance institutions used in the fixed form can not be removed by the nail gun. Based on the usage habits of different users or the use of special work places, such as a narrow working space, the setting of the insurance mechanism may lead to the power nail. The gun is inoperable or reduces the user's operational fluency.

In view of this, how to improve the insurance mechanism of the power nail gun makes it easy to adjust the nailing depth and quickly dismantle the nail gun, which is the goal of the relevant industry.

An embodiment of the present invention provides a power nail gun insurance mechanism that is disposed on a power nail gun, and the insurance mechanism includes an adjustment unit, a linkage unit, and a fuse unit. The adjusting unit comprises a rotating shaft, an adjusting member and a fixing member. The shaft defines an axial direction. The adjusting member is disposed on the rotating shaft, and the adjusting member has a convex portion at one end and an receiving portion at the other end. Fastener The sleeve is sleeved on the rotating shaft, and the fixing member has at least two-stage portions, which are respectively a first-stage portion and a second-stage portion, and one of the step portions is opposite to the convex portion of the adjusting member. The linkage unit is respectively connected to the fixing member of the adjusting unit and a firing mechanism of the power nail gun. The fuse unit is disposed in a firing port of the power nail gun, and the insurance unit includes a latching portion correspondingly disposed in the receiving portion. The adjustment member can be switched between the first position, the second position and the third position by rotating the adjustment member. Wherein, when the adjusting member is in the first position, the convex portion is aligned with the first step portion of the fixing member; when the adjusting member is in the second position, the convex portion is aligned with the second step portion; when the adjusting member is located at the first position In the three positions, the engaging portion is loosened from the receiving portion.

Thereby, when the adjusting member is in the first position or the second position, the engaging portion of the securing unit is accommodated in the receiving portion of the adjusting member, and the securing unit is engaged with the adjusting member; and the securing unit, the adjusting member and the fixing portion are fixed. The piece and the linkage unit are axially moved inwardly to drive the firing mechanism to a preliminary firing position, and the power nail gun can be fired when the firing position is prepared. By switching between the first position and the second position by the rotation adjusting member, the nailing depth of the power nail gun can be changed, thereby having the advantages of compact structure and easy adjustment of the nailing depth. When the adjusting member is in the third position, since the engaging portion and the receiving portion are loose, the securing unit is separated from the adjusting member, and the securing unit can be dismantled by simply pushing the securing unit outward in the axial direction. It has the advantage of rapid dismantling, which is beneficial to the application of the power nail gun to different working conditions or to meet the usage habits of different users.

According to the foregoing power nail gun safety mechanism, the receiving portion of the adjusting member may include a parallel axial longitudinal groove and an outer ring groove communicating with the longitudinal groove, and the outer ring groove is opened in the adjusting member. A circumferential outer wall. its The engaging portion is received in the longitudinal groove when the adjusting member is in the third position, and the engaging portion is received in the outer ring groove when the adjusting member is in the first position or the second position, and the engaging portion is It is a bump. The receiving portion corresponds to the shape of the engaging portion, so that the adjusting member can move relative to the engaging portion of the securing unit during the adjusting, and the adjusting member can be engaged or loosened by the position of the engaging portion. the goal of. In addition, the adjusting unit may further include a stopping portion and an elastic member. The stopping portion is disposed on the rotating shaft, and the elastic member is disposed between the stopping portion and the fixing member, and the elastic member provides an elastic force to abut the fixing member and the adjusting member. Thereby, the reaction force generated when the power nail gun is fired can be avoided to cause the power nail gun to bounce and cause the axial displacement of the fixing member and the adjusting member to be out of synchronization, and the fixing member and the adjusting member can be prevented from being separated from each other. One of the adjusting member or the fixing member may have elasticity, whereby the friction loss when the adjusting member is switched between the first position, the second position, and the third position can be reduced, and the position switching can be made smoother.

According to the foregoing power nail gun safety mechanism, the adjusting member is urged by the elastic force of the elastic member to press the fixing member. By this pressing action, the fixing force between the adjusting member and the fixing member can be strengthened, and no radial displacement can be generated between the adjusting member and the fixing member, thereby avoiding the dynamic nail gun during the operation, because of vibration or other external force factors. , causing the adjusting member to move from the first position or the second position engaged with the securing unit to the third position loosened from the securing unit, so that the safety unit is suddenly separated and dangerous; and when one of the adjusting member or the fixing member has elasticity When the fixation force is better.

According to the foregoing power nail gun safety mechanism, when the adjusting member is switched from the second position to the first position, the adjusting member is displaced axially toward the firing port, whereby the adjusting member can drive the safety unit to be axially displaced, thereby changing the nailing depth.

Another embodiment of the present invention provides a power nail gun insurance mechanism that is disposed on a power nail gun, and the insurance mechanism includes an adjustment unit, a linkage unit, and a fuse unit. The adjusting unit comprises a rotating shaft, an adjusting member, a fixing member and an elastic member. The shaft defines an axial direction. The adjusting member is disposed on the rotating shaft, and the adjusting member has a convex portion at one end and an receiving portion at the other end. The fixing member is sleeved on the rotating shaft, and the fixing member has at least two-stage portions, which are respectively a first-stage portion and a second-stage portion, and one of the step portions is opposite to the convex portion of the adjusting member. The elastic member is disposed on the rotating shaft, and the elastic member provides an elastic force to push against the fixing member, so that the first step portion or the second step portion abuts against the convex portion. The linkage unit is respectively connected to the fixing member of the adjusting unit and a firing mechanism of the power nail gun. The fuse unit is disposed in a firing port of the power nail gun, and the securing unit includes a latching portion, and the latching portion is a bump and is correspondingly received in the receiving portion. The adjusting member can be switched between a first position, a second position and a third position by rotating the adjusting member. Wherein, when the adjusting member is in the first position, the convex portion is aligned with the first step portion of the fixing member; when the adjusting member is in the second position, the convex portion is aligned with the second step portion; when the adjusting member is located at the first position In the three positions, the engaging portion is loosened from the receiving portion.

Thereby, when the adjusting member is in the first position or the second position, the engaging portion of the securing unit is accommodated in the receiving portion of the adjusting member, and the securing unit is engaged with the adjusting member; and the securing unit, the adjusting member and the fixing portion are fixed. The piece and the linkage unit are axially moved inwardly to drive the firing mechanism to a preliminary firing position, and the power nail gun can be fired when the firing position is prepared. By switching between the first position and the second position by the rotation adjusting member, the nailing depth of the power nail gun can be changed, thereby having the advantages of compact structure and easy adjustment of the nailing depth. And when When the adjusting member is in the third position, since the engaging portion and the receiving portion are loose, the securing unit is separated from the adjusting member, and only the securing unit is pushed out in the axial direction, and the automatic unit of the insurance unit can be removed. The advantage of rapid dismantling is that the power nail gun can be applied to different working conditions or can meet the usage habits of different users.

According to the foregoing power nail gun safety mechanism, the receiving portion of the adjusting member may include a parallel axial longitudinal groove and an outer ring groove communicating with the longitudinal groove, and the outer ring groove is opened in the adjusting member. A circumferential outer wall. Wherein, when the adjusting member is in the third position, the engaging portion is accommodated in the longitudinal groove, and when the adjusting member is in the first position or the second position, the engaging portion is accommodated in the outer ring groove

According to the foregoing power nail gun safety mechanism, when the adjusting member is switched from the second position to the first position, the adjusting member is displaced axially toward the firing port, whereby the adjusting member can drive the safety unit to be axially displaced, thereby further changing The nailing depth.

100‧‧‧Power nail gun

110‧‧‧Insurance institutions

120‧‧‧Scratch

130‧‧‧Scoring agency

140‧‧‧ Ontology

228‧‧‧ Ring groove

230‧‧‧Fixed parts

231‧‧‧First Class Department

232‧‧‧Second Class Department

240‧‧‧Flexible parts

200‧‧‧Adjustment unit

210‧‧‧ shaft

220‧‧‧Adjustment

221‧‧‧ 容部

222‧‧‧ convex

224‧‧‧ outer ring groove

225‧‧‧ longitudinal grooves

226‧‧‧ casing

227‧‧‧Circumferential wall

250‧‧‧Operation Department

260‧‧‧stop

270‧‧‧ casing ring

300‧‧‧ linkage unit

400‧‧‧ insurance unit

410‧‧‧Clock Department

D‧‧‧ step

I‧‧‧ axial

1 is a perspective view of a power nail gun according to an embodiment of the present invention; FIG. 2 is a partial enlarged view of the power nail gun of FIG. 1; and FIG. 3 is an exploded view of the safety mechanism of FIG. FIG. 4 is a cross-sectional view showing the power nail gun of FIG. 2 along the cutting line 4-4; and FIG. 5 is a cross-sectional view showing the power nail gun of FIG. 2 along the cutting line 5-5; Figure 6 is a schematic view showing the release of the fuse unit and the adjusting member of Figure 2; 7 is an enlarged plan view showing the adjusting member and the fixing member of FIG. 3; FIG. 8 is a schematic plan view showing the adjusting member of FIG. 2 in a second position; and FIG. 9 is a second drawing showing the adjusting member of FIG. A top view of the first location.

Please refer to Figure 1. FIG. 1 is a perspective view of a power nail gun 100 according to an embodiment of the invention. The power nail gun 100 includes a safety mechanism 110, a firing port 120, a firing mechanism 130, and a body 140. The insurance mechanism 110 is disposed on the body 140 of the power nail gun 100.

Please refer to Figure 2 and Figure 3 together. 2 is a partial enlarged view of the power nail gun 100 of FIG. 1 , and FIG. 3 is an exploded perspective view of the safety mechanism 110 of FIG. 2 . The insurance mechanism 110 includes an adjustment unit 200, a linkage unit 300, and an insurance unit 400.

The adjusting unit 200 includes a rotating shaft 210, an adjusting member 220, a fixing member 230 and an elastic member 240. The rotating shaft 210 defines an axial direction I, and one end of the rotating shaft 210 is connected to the adjusting member 220, and the other end is connected to the body 140. The rotating shaft 210 is not displaced relative to the body 140 in the axial direction I. The adjusting member 220 is sleeved on the rotating shaft 210 along the axial direction I. One end of the adjusting member 220 has a convex portion 222 and a sleeve 226. The convex portion 222 is located radially outward of the sleeve 226, and the sleeve 226 is sleeved on the rotating shaft. 210 on. The other end of the adjusting member 220 has a receiving portion 221. The receiving portion 221 includes a longitudinal groove 225 and an outer ring groove 224. The longitudinal groove 225 is parallel to the axial direction I. The outer ring groove 224 is formed on the circumferential outer wall 227 of the adjusting member 220. And communicating with the longitudinal groove 225. The fixing member 230 is sleeved on the rotating shaft 210 through the sleeve 226. The fixing member 230 has two-stage portions, which are a first-stage portion 231 and a second-stage portion 232, respectively, and the first-stage portion 231 and the second-stage portion 232 are used to align with the convex portion 222. The elastic member 240 is disposed on the rotating shaft 210 through the sleeve 226. The interlocking unit 300 is connected to the fixing member 230 of the adjusting unit 200 and the firing mechanism 130 of the power nail gun 100 (see FIG. 1). The fuse unit 400 is disposed in the firing port 120 , and the securing unit 400 includes an engaging portion 410 . The latching portion 410 is correspondingly received in the receiving portion 221 of the adjusting member 220 . The adjusting member 220 is mutually switchable between the first position, the second position and the third position. When the adjusting member 220 is in the first position, the convex portion 222 is aligned with the first step portion 231, and the engaging portion 410 is accommodated in the The outer ring groove 224 of the accommodating portion 221, at this time, the adjusting member 220 and the securing unit 400 are in a engaged state; when the adjusting member 220 is in the second position, the convex portion 222 is aligned with the second-stage portion 232, and is engaged The portion 410 is also disposed in the outer ring groove 224 of the accommodating portion 221, and the adjusting member 220 and the securing unit 400 are also in a engaged state; when the adjusting member 220 is in the third position, the engaging portion 410 is accommodated in the accommodating portion 410. The longitudinal groove 225 of the portion 221 is in a state where the adjusting member 220 and the securing unit 400 are detachably released.

Please refer to FIG. 4 at the same time, which is a cross-sectional view of the power nail gun 100 of FIG. 2 along the cutting line 4-4, and FIG. 4 illustrates the adjusting member 220 at the second position, at this time, the convex portion 222 The second step portion 232 is aligned with the second step portion 232, and the engaging portion 410 is received in the outer ring groove 224 of the receiving portion 221. As can be seen from FIG. 4, the engaging portion 410 cannot be displaced relative to the adjusting member 220 in the axial direction. That is, the adjustment member 220 and the insurance unit 400 are in an engaged state, whereby the insurance unit 400 is connected to the adjustment member 220. When the adjusting member 220 is in the first position, the relationship between the engaging portion 410 and the outer ring groove 224 is the same as the second position, and details are not described herein again.

Please refer to FIG. 3 and FIG. 5 simultaneously. FIG. 5 is a cross-sectional view showing the power nail gun 100 of FIG. 2 along the cutting line 5-5. The fifth embodiment shows that the adjusting member 220 is located at the third position. At this time, the engaging portion 410 is received in the longitudinal groove 225 of the receiving portion 221, and the longitudinal groove 225 is parallel to the axial direction I, as shown in FIG. The engaging portion 410 is displaceable relative to the adjusting member 220 in the axial direction I, that is, the adjusting member 220 and the securing unit 400 are detachably released. Referring to FIG. 6 together, FIG. 6 is a schematic diagram showing the release of the fuse unit 400 and the adjusting member 220 of FIG. 2. When the third position of the adjusting member 220 is rotated, only the securing unit 400 needs to be outward in the axial direction I. With the introduction, the fuse unit 400 can be removed from the firing port 120, which has the advantage of rapid removal.

Referring to FIG. 2, in the embodiment, the adjusting unit 200 further includes an operating portion 250. The operating portion 250 is disposed on the rotating shaft 210, and the rotating shaft 210 can be controlled to rotate the adjusting member 220, thereby facilitating rotation of the user. Adjustment member 220. Referring to FIG. 3, in the embodiment, the engaging portion 410 is a bump, and the design of the bump is simple and convenient to enter the receiving portion 221, and the bump is exemplified by a square bump. The shape of the bumps may also be cylindrical or other shapes. The rotating shaft 210 and the shape of the sleeve 226 cooperate with each other. The cross section of the rotating shaft 210 is exemplarily a circular shape, so that the rotating shaft 210 can rotate the adjusting member 220 while rotating, while retaining the adjusting member 220 in the axial direction. The space of the I displacement, of course, the cross section of the rotating shaft 210 may also be a polygonal shape or other shape, or an axial long groove and a protrusion which are matched with the sleeve 226, and the manner of cooperation is generally known in the technical field. Can be easily replaced, not subject to the above disclosure.

In this embodiment, the adjusting unit 200 further includes a stop. The sleeve 260 and the sleeve ring 270 are disposed on the rotating shaft 210 through the sleeve 226. The sleeve ring 270 is disposed on a ring groove 228 of the sleeve 226 and is located at one end of the stopping portion 260 away from the fixing member 230. The ring 270 serves to prevent the resilient member 240 and the stop portion 260 from coming out of the sleeve 226. The elastic member 240 is sleeved on the sleeve 226 and disposed between the stopping portion 260 and the fixing member 230. The elastic force provided by the elastic member 240 can cause the fixing member 230 to abut against the adjusting member 220 without being separated, or elastic. The spring force provided by the member 240 allows the fastener 230 to tighten the adjustment member 220. In detail, please refer to FIG. 1 and FIG. 2 together. When the user operates the power nail gun 100, the insurance unit 400 is pressed against a target surface (not shown), and the insurance unit 400 is stressed. Moving inwardly along the axial direction I, the adjusting member 220, the fixing member 230 and the linking unit 300 are actuated to cause the linking unit 300 to drive the firing mechanism 130 to a preliminary firing position. At this time, the firing mechanism 130 is in an unlocked state, and the user can touch the firing. The mechanism 130 fires a nail (not shown). When the power nail gun 100 is fired, a reaction force is generated to cause the power nail gun 100 to bounce, which causes the fixing member 230 and the adjusting member 220 to generate an asynchronous axial displacement. The present invention maintains the fixing member by the elastic member 240 having an elastic force. 230 abuts against the adjustment member 220 without disengagement. In this embodiment, the elastic member 240 is a spring. In other embodiments, the elastic member 240 may be another elastic restoring member, but such as a metal elastic or the like. Of course, the elastic member 240 may not be provided. It is necessary to hold the fixing member 230 and the adjusting member 220 against each other. The fixing member 230 and the elastic member 240 may not be sleeved on the sleeve 226, but may be directly sleeved on the rotating shaft 210, and are not limited to the above disclosure.

The term "inward" refers to a direction approaching the body 140, and the term "outward" refers to a direction away from the body 140.

Please refer to Figures 7 to 9 together. FIG. 7 is a schematic top plan view of the adjusting member 220 and the fixing member 230 of FIG. 3 , FIG. 8 is a top plan view showing the adjusting member 220 of FIG. 2 at the second position, and FIG. 9 is a second view of FIG. A top view of the adjustment member 220 in the first position. In Fig. 7, the fixing member 230 has a first-stage portion 231 and a second-stage portion 232, and the first-stage portion 231 and the second-stage portion 232 have a step D in the axial direction I. Referring to FIG. 8 and FIG. 9 together, when the adjusting member 220 is switched from the second position (FIG. 8) to the first position (FIG. 9), the adjusting member 220 is displaced to the firing port 120 along the axial direction I. The length of the difference D, in other words, the fuse unit 400 is displaced by the adjustment member 220 to the length of the step D along the axial direction I, that is, the length of the fuse unit 400 protruding the firing port 120 is increased by the step D. In other words, the user can select the position of the adjustment member 220 according to the needs of the construction occasion. When the adjusting member 220 is in the second position, the length of the protruding firing port 120 of the securing unit 400 is short, and is suitable for a workpiece with a hard material and a large force. If the adjusting member 220 is in the first position, the insurance unit 400 The length of the protruding firing port 120 is long, and is suitable for a workpiece with a soft material and a small force. Therefore, the present invention can easily achieve the purpose of changing the nailing depth by simply rotating the adjusting member 220.

In this embodiment, since one end of the elastic member 240 abuts against the sleeve 226, and the elastic member 240 is compressed or stretched, a reaction force acts on the adjacent object, so the adjustment member 220 can be subjected to the elastic member 240. The elastic force acts to tighten the fixing member 230, and the fixing member 230 has a slight elasticity, which can reduce the friction loss of the fixing member 230 and the adjusting member 220 when the position is switched. In other embodiments of the non-elastic member 240, the convex portion 222 of the adjusting member 220 and the first-stage portion 231 or the second-stage portion 232 of the fixing member 230 may be designed to be mutually The shape of the fitting allows the two to be fixed to each other without being limited by the above disclosure.

As can be seen from the above embodiments, the present invention has the following advantages:

1. By adjusting the fit of the component receiving portion and the securing unit engaging portion, the securing member can be engaged or released by the rotating adjusting member to achieve the detachable function of the securing unit.

Second, by the design of the elastic member, the fixing member can be kept in abutment with the adjusting member, and the elastic force of the elastic member can make the adjusting member tighten the fixing member to avoid loosening during the operation.

3. By aligning the class part on the fixing member with the convex part of the adjusting member, the length of the protruding firing port of the insurance unit can be changed, and the user can achieve the purpose of changing the nailing depth according to actual needs.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

110‧‧‧Insurance institutions

120‧‧‧Scratch

140‧‧‧ Ontology

200‧‧‧Adjustment unit

210‧‧‧ shaft

220‧‧‧Adjustment

221‧‧‧ 容部

222‧‧‧ convex

224‧‧‧ outer ring groove

225‧‧‧ longitudinal grooves

226‧‧‧ casing

227‧‧‧Circumferential wall

228‧‧‧ Ring groove

230‧‧‧Fixed parts

231‧‧‧First Class Department

232‧‧‧Second Class Department

240‧‧‧Flexible parts

250‧‧‧Operation Department

260‧‧‧stop

270‧‧‧ casing ring

300‧‧‧ linkage unit

400‧‧‧ insurance unit

410‧‧‧Clock Department

I‧‧‧ axial

Claims (10)

A power nail gun insurance mechanism is disposed on a power nail gun, the insurance mechanism comprising: an adjustment unit comprising: a rotating shaft defining an axial direction; an adjusting member disposed on the rotating shaft, the adjusting member having a convex end The other end has a receiving portion; and a fixing member is sleeved on the rotating shaft, the fixing member has at least two-stage portions, which are respectively a first-stage portion and a second-stage portion, and one of the classes The portion is opposite to the convex portion of the adjusting member; a linking unit is respectively connected to the fixing member of the adjusting unit and a firing mechanism of the power nail gun; and a safety unit is disposed at a firing port of the power nail gun The safety unit includes a latching portion, and the latching portion is correspondingly received in the receiving portion. The adjusting member is rotated to adjust the adjusting member to a first position, a second position and a third position. Switching, wherein the adjusting member is located at the first position, the convex portion is aligned with the first step portion of the fixing member, the adjusting member is located at the second position, and the convex portion is aligned with the second step portion, The adjustment is located in the third place The release engaging portion with the receiving portion. The power nail gun insurance mechanism of claim 1, wherein the engaging portion is a bump. The power nail gun insurance mechanism as claimed in claim 2, wherein the housing portion comprises: a longitudinal groove parallel to the axial direction; and an outer ring groove communicating with the longitudinal groove and opening on a circumferential outer wall of the adjusting member; wherein the adjusting member is located at the third position, the engaging portion is The adjusting portion is located at the first position or the second position, and the engaging portion is received in the outer ring groove. The power nail gun safety mechanism of claim 1, wherein the adjusting unit further comprises: a stopping portion disposed on the rotating shaft; and an elastic member, the elastic member is disposed on the stopping portion and the fixing portion The elastic member provides an elastic force to abut the fixing member and the adjusting member. The power nail gun safety mechanism of claim 4, wherein the fixing member is forced by the elastic force of the elastic member to press the adjusting member. The power nail gun safety mechanism of claim 5, wherein the adjusting member is displaced to the firing port along the axial direction when the adjusting member is switched from the second position to the first position. The power nail gun safety mechanism of claim 6, wherein one of the adjusting member or the fixing member has elasticity. A power nail gun insurance mechanism, which is arranged on a power The nail gun includes: an adjusting unit comprising: a rotating shaft defining an axial direction; an adjusting member disposed on the rotating shaft, the adjusting member having a convex portion at one end and a receiving portion at the other end; The fixing member is sleeved on the rotating shaft, and the fixing member has at least two step portions, which are respectively a first step portion and a second step portion, and one of the step portions is opposite to the convex portion of the adjusting member; An elastic member is disposed on the rotating shaft, and the elastic member provides an elastic force to push against the fixing member to abut the first step portion or the second step portion and the convex portion; a linkage unit is respectively connected to the adjusting unit a fixing mechanism and a firing mechanism of the power nail gun: and a safety unit disposed on a firing port of the power nail gun, the insurance unit includes a locking portion, the engaging portion is a bump, and the card The adjusting portion is disposed between the first position, the second position and the third position, wherein the adjusting member is located in the first position, and the adjusting member is disposed in the first position. The convex portion and the first step of the fixing member Bit portion of the adjusting member at the second position, the projection portion and the second portion of the bit classes, the adjusting element is in the third position, the engaging portion and release the receiving portion. The power nail gun safety mechanism of claim 8, wherein the receiving portion comprises: a longitudinal groove parallel to the axial direction; An outer ring groove communicating with the longitudinal groove and opening on a circumferential outer wall of the adjusting member; wherein the adjusting member is located at the third position, the engaging portion is received in the longitudinal groove, and the adjusting member is located In the first position or the second position, the engaging portion is received in the outer ring groove. The power nail gun safety mechanism of claim 9, wherein the adjusting member is displaced to the firing port along the axial direction when the adjusting member is switched from the second position to the first position.