Switch sealing structure and electric tool

Abstract

The utility model provides a switch sealing structure and an electric tool, the switch sealing structure comprises a casing, a trigger and a sealing sleeve, and the casing is provided with a guide hole in a penetrating manner; the trigger is located outside the machine shell, one end of the trigger is rotatably arranged on the machine shell, a pressing rod is arranged on the trigger in a protruding mode, and the pressing rod can be movably inserted into the guide hole; the sealing sleeve is located outside the machine shell, the pressing rod is sleeved with the sealing sleeve, and the sealing sleeve abuts against the outer shell wall of the machine shell. By adding the sealing sleeve on the pressing rod of the trigger, when the trigger presses the switch in the casing, the sealing sleeve is extruded in the pressing direction of the trigger, and the sealing sleeve deforms in the direction perpendicular to the pressing direction, so that the contact area between the sealing sleeve and the casing wall of the casing is increased; according to the technical scheme, the space, communicated with the outside, in the machine shell is reduced, the sealing performance of the guide hole of the machine shell is improved, and therefore the probability that dust enters the machine shell is reduced, and electronic components in the machine shell are prevented from being damaged by the dust.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of electric tools, and in particular to a switch sealing structure and an electric tool. Background Art

[0002] Power tools like grinders are driven by motors, which in turn drive accessories connected to the output terminals to work on the workpiece. A common switch type for power tools is the trigger switch. The sealing structure of the trigger switch often consists of a labyrinthine structure, which is somewhat effective in preventing dust. However, in harsh working conditions with high dust content, the labyrinthine structure alone is often insufficient. Dust can easily enter the handle and damage electronic components such as the switch. Therefore, optimization and redesign of the dustproof structure are essential. Utility Model Content

[0003] The purpose of the embodiments of the present utility model is to provide a switch sealing structure and an electric tool, aiming to solve the problem that the dust-proof maze structure of the existing electric tool is limited in effect, and dust may enter the casing, causing the switch and other electronic components in the casing to be easily damaged.

[0004] In order to solve the above technical problems, the embodiments of the present invention provide a switch sealing structure, comprising:

[0005] A casing, wherein a guide hole is provided through the casing;

[0006] a trigger, the trigger being located outside the housing, one end of the trigger being rotatably mounted on the housing, a pressing rod being protruding from the trigger, and an end of the pressing rod away from the trigger being movably inserted into the guide hole along the axial direction of the pressing rod, and being configured to drive the pressing rod to move when the trigger is rotated, so as to trigger a switch located within the housing through the end of the pressing rod away from the trigger;

[0007] A sealing sleeve is located outside the casing, the sealing sleeve is sleeved on the pressing rod, and one end of the sealing sleeve away from the trigger abuts against the outer wall of the casing.

[0008] Preferably, the sealing sleeve is provided with an annular convex edge at the connection between the end surface and the outer peripheral surface close to the housing, and the annular convex edge is in contact with the outer shell wall of the housing.

[0009] Preferably, the switch sealing structure further comprises an elastic member, which is sleeved on the pressing rod, wherein one end of the elastic member close to the housing abuts against the side of the annular ridge away from the housing, and the other end of the elastic member away from the housing abuts against the connection between the pressing rod and the trigger.

[0010] Preferably, an annular protrusion is provided on the peripheral side surface of the end of the pressing rod close to the trigger, and the end of the elastic member away from the housing abuts against the side of the annular protrusion close to the housing.

[0011] Preferably, an annular boss is provided on the peripheral side surface of the end of the pressing rod close to the trigger, and the annular boss is located on the side of the annular protrusion close to the housing. The end of the elastic member away from the housing is sleeved on the annular boss, and the elastic member forms a snap fit with the annular boss.

[0012] Preferably, the elastic member is a spring.

[0013] Preferably, the sealing sleeve is a rubber sleeve.

[0014] Preferably, a mounting groove is provided on the outer shell wall of the casing, the trigger is rotatably provided at the mounting groove, the guide hole is provided on the bottom wall of the mounting groove, and the end of the sealing sleeve away from the trigger abuts against the bottom wall of the mounting groove.

[0015] Preferably, a rotation connection structure is provided between one end of the trigger and the housing, and a grip portion is provided at one end of the trigger away from the rotation connection structure. The grip portion is used for the operator to grip and rotate the pressing rod, and the pressing rod is provided on the grip portion.

[0016] In order to achieve the above-mentioned object, the present invention also provides an electric tool, comprising the above-mentioned switch sealing structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the switch sealing structure of the present invention adds a sealing sleeve to the pressing rod of the trigger. When the switch in the casing is pressed by the trigger, the sealing sleeve is squeezed in the pressing direction of the trigger, and the sealing sleeve will deform in a direction perpendicular to the pressing direction, thereby increasing the contact area between the sealing sleeve and the outer wall of the casing, reducing the space connecting the inside of the casing with the outside world, and improving the sealing of the guide hole of the casing, thereby reducing the probability of dust entering the inside of the casing and preventing dust from damaging the electronic components inside the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 This is a schematic structural diagram of an electric tool in an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the internal structure of the power tool;

[0021] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0022] Figure 4 for Figure 2 Exploded view of the trigger.

[0023] Description of the accompanying drawings of this utility model:

[0024] Power tool 100 , housing 1 , guide hole 11 , mounting slot 12 , trigger 2 , grip 21 , rotating shaft 22 , limit hook 23 , pressing rod 3 , annular protrusion 31 , annular boss 32 , sealing sleeve 4 , annular flange 41 , switch 5 , switch housing 51 , elastic member 6 , safety member 7 .

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The utility model provides a switch sealing structure, which can be used in electric tools such as grinders. The following will take the switch sealing structure used in a grinder as an example for introduction. Figures 1 to 4 The invention shows a preferred embodiment of the switch sealing structure used in a grinding machine.

[0030] See also Figures 1 to 4 In this embodiment, the switch sealing structure includes a housing 1 , a trigger 2 and a sealing sleeve 4 .

[0031] See also Figures 1 to 4 A guide hole 11 is provided through the housing 1 .

[0032] Specifically, a mounting cavity is formed within the housing 1, and electronic components such as a switch 5 are disposed within the mounting cavity. A guide hole 11 is provided on the housing wall of the housing 1, corresponding to the switch 5. The guide hole 11 penetrates the housing wall of the housing 1 and communicates with the mounting cavity of the housing 1. Hereinafter, the direction in which the guide hole 11 penetrates the housing wall of the housing 1 is defined as "upward and downward," and the guide hole 11 is provided on the lower housing wall of the housing 1.

[0033] See also Figures 1 to 4 The trigger 2 is located outside the casing 1, and one end of the trigger 2 can be rotatably arranged on the casing 1. A pressing rod 3 is protruded from the trigger 2. The end of the pressing rod 3 away from the trigger 2 can be inserted into the guide hole 11 and moved along the axial direction of the pressing rod 3. It is used to drive the pressing rod 3 to move when the trigger 2 rotates, so as to trigger the switch 5 located in the casing 1 through the end of the pressing rod 3 away from the trigger 2.

[0034] Specifically, one end of the trigger 2 in the longitudinal direction of the trigger 2 is rotatably mounted on the housing 1, and the rotation axis of the trigger 2 is parallel or approximately parallel to the width direction of the trigger 2. Hereinafter, the longitudinal direction of the trigger 2 is defined as the front-to-back direction, and the end of the trigger 2 that is rotatably connected to the housing 1 is defined as the rear end of the trigger 2.

[0035] A rotation connection structure is provided between the rear end of the trigger 2 and the housing 1, and the rear end of the trigger 2 is rotatably provided on the housing 1 through the rotation connection structure. The specific setting method of the rotation connection structure is not particularly limited. Figures 1 to 4 In this embodiment, the rotating connection structure includes a rotating shaft 22 and a rotating shaft hole (not shown in the figure). The rotating shaft hole is set on the housing 1, and the rotating shaft 22 extends along the width direction of the trigger 2. The rotating shaft 22 is set at the rear end of the trigger 2.

[0036] Optionally, see Figures 1 to 4In this embodiment, a grip portion 21 is provided at one end of the trigger 2, away from the rotational connection structure, for the operator to grip and rotate the pressing rod 3. The grip portion 21 is provided at the front end of the trigger 2. When the operator grips the grip portion 21 of the pressing rod 3, the pressing rod 3 can be driven to rotate toward the housing 1.

[0037] The pressing rod 3 extends vertically and is disposed upwardly on the trigger 2. The lower end of the pressing rod 3 is disposed on the trigger 2, and the upper end of the pressing rod 3 is inserted into the guide hole 11 of the housing 1. The pressing rod 3 is movable up and down relative to the housing 1. When an operator presses the grip 21 of the pressing rod 3, the pressing rod 3 rotates toward the housing 1, driving the pressing rod 3 upward, allowing the upper end of the pressing rod 3 to extend into the housing 1 and press the trigger point of the switch 5. The lower end of the pressing rod 3 can be fixed to the trigger 2 by means of a clip or screw, or the pressing rod 3 can be integrally formed with the trigger 2.

[0038] See also Figures 1 to 4 The sealing sleeve 4 is located outside the casing 1 , and the sealing sleeve 4 is sleeved on the pressing rod 3 . The end of the sealing sleeve 4 away from the trigger 2 abuts against the outer wall of the casing 1 .

[0039] Specifically, the sealing sleeve 4 may be a rubber sleeve, etc., and is mounted on the pressing rod 3, and the pressing rod 3 is arranged to be movable up and down relative to the sealing sleeve 4. When the operator does not press the trigger 2, that is, when the trigger 2 is in the initial position, the upper end surface of the sealing sleeve 4 abuts against the outer wall of the housing 1, so that the sealing sleeve 4 can seal the guide hole 11 of the housing 1. When the operator presses the trigger 2, that is, when the trigger 2 is in the pressing position, the sealing sleeve 4 is squeezed in the pressing direction of the trigger 2 (i.e., up and down), and the sealing sleeve 4 deforms horizontally. This increases the contact area between the sealing sleeve 4 and the outer wall of the housing 1, reduces the space between the interior of the housing 1 and the outside world, and improves the sealing performance of the guide hole 11 of the housing 1, thereby reducing the probability of dust entering the interior of the housing 1 and preventing dust from damaging the electronic components inside the housing 1.

[0040] The lower end of the sealing sleeve 4 can abut against the trigger 2 or the pressing rod 3, so that the sealing sleeve 4 can be squeezed when the trigger 2 is pressed; the lower end of the sealing sleeve 4 can also abut against a component fixed to the trigger 2 or the pressing rod 3, so that the sealing sleeve 4 can be squeezed when the trigger 2 is pressed. Figures 1 to 4 In this embodiment, the switch sealing structure also includes an elastic member 6, which is sleeved on the pressing rod 3. The end of the elastic member 6 close to the housing 1 abuts against the lower side of the sealing sleeve 4, and the end of the elastic member 6 away from the housing 1 abuts against the connection between the pressing rod 3 and the trigger 2.

[0041] Specifically, the elastic member 6 can be a spring, etc., with the upper end of the elastic member 6 abutting the underside of the sealing sleeve 4, and the lower end of the elastic member 6 abutting the connection between the pressing rod 3 and the trigger 2. When the trigger 2 is in the pressed position, the elastic force of the elastic member 6 causes the upper end surface of the sealing sleeve 4 to abut against the outer wall of the housing 1. When the operator presses the trigger 2, the pressing force applied to the trigger 2 is transmitted to the sealing sleeve 4 via the elastic member 6, causing the sealing sleeve 4 to be squeezed in the direction of the trigger 2's pressing. When the operator releases the trigger 2, the trigger 2 automatically returns to its initial position under the action of the elastic member 6, simultaneously driving the pressing rod 3 to automatically move downward and reset.

[0042] The lower end of the elastic member 6 can abut against the trigger 2, and the lower end of the elastic member 6 can also abut against the pressing rod 3. Figures 1 to 4 In this embodiment, an annular protrusion 31 is provided on the peripheral side surface of the pressing rod 3 near the trigger 2 , and the end of the elastic member 6 away from the housing 1 abuts against the side of the annular protrusion 31 near the housing 1 .

[0043] Specifically, the annular protrusion 31 is provided at the junction of the peripheral side surface and the lower end surface of the pressing rod 3, and the lower surface of the annular protrusion 31 is flush with the lower end surface of the pressing rod 3. The elastic member 6 is located above the annular protrusion 31, and the lower end of the elastic member 6 abuts the upper surface of the annular protrusion 31.

[0044] Further, see Figures 1 to 4 In this embodiment, an annular boss 32 is convexly provided on the peripheral side surface of the pressing rod 3 near the trigger 2. The annular boss 32 is located on the side of the annular protrusion 31 near the housing 1. The end of the elastic member 6 away from the housing 1 is sleeved on the annular boss 32, and the elastic member 6 and the annular boss 32 form a snap fit.

[0045] Specifically, the annular boss 32 is located above the annular protrusion 31 and is provided at the junction of the circumferential side surface of the pressing rod 3 and the upper surface of the annular protrusion 31. The lower end of the elastic member 6 and the annular protrusion 31 form an interference fit, thereby forming a snap fit between the lower end of the elastic member 6 and the annular boss 32, thereby fixing the elastic member 6 to the pressing rod 3.

[0046] The switch sealing structure of the present invention adds a sealing sleeve 4 to the pressing rod 3 of the trigger 2. When the switch 5 in the housing 1 is pressed by the trigger 2, the sealing sleeve 4 is squeezed in the pressing direction of the trigger 2, and the sealing sleeve 4 will deform in a direction perpendicular to the pressing direction. This increases the contact area between the sealing sleeve 4 and the outer wall of the housing 1, reduces the space connecting the inside of the housing 1 with the outside world, and improves the sealing performance of the guide hole 11 of the housing 1, thereby reducing the probability of dust entering the interior of the housing 1 and preventing dust from damaging the electronic components inside the housing 1.

[0047] Optionally, see Figures 1 to 4 In this embodiment, an annular convex edge 41 is provided at the connection between the end surface of the sealing sleeve 4 close to the housing 1 and the outer peripheral surface, and the annular convex edge 41 is in contact with the outer shell wall of the housing 1.

[0048] Specifically, the outer diameter of the upper end of the sealing sleeve 4 is larger than that of the lower end, thereby forming an annular ridge 41 at the junction of the upper end surface and the outer peripheral surface of the sealing sleeve 4. The sealing sleeve 4 abuts against the outer wall of the housing 1 via the annular ridge 41, which not only increases the contact area between the sealing sleeve 4 and the outer wall of the housing 1 but also facilitates deformation of the upper end of the sealing sleeve 4 when squeezed, thereby further improving the sealing performance of the guide hole 11 of the housing 1.

[0049] Further, see Figures 1 to 4 In this embodiment, one end of the elastic member 6 close to the housing 1 abuts against a side of the annular convex edge 41 away from the housing 1 .

[0050] Specifically, the upper end of the elastic member 6 is sleeved on the outer periphery of the lower end of the sealing sleeve 4, and the upper end of the elastic member 6 abuts the lower surface of the annular flange 41, so that the pressing force applied to the trigger 2 can be transmitted to the annular flange 41 of the sealing sleeve 4 through the elastic member 6, so that the annular flange 41 of the sealing sleeve 4 is squeezed in the pressing direction of the trigger 2 and deformed.

[0051] Optionally, see Figures 1 to 4 In this embodiment, a mounting groove 12 is provided on the outer shell wall of the casing 1, the trigger 2 can be rotatably arranged at the mounting groove 12, the guide hole 11 is provided on the bottom wall of the mounting groove 12, and the end of the sealing sleeve 4 away from the trigger 2 abuts against the bottom wall of the mounting groove 12.

[0052] Specifically, the lower wall of the housing 1 is provided with a mounting groove 12 with a notch facing downward. The shape of the mounting groove 12 generally matches the shape of the trigger 2. When the trigger 2 is in the initial position, at least a portion of the grip portion 21 of the trigger 2 extends out of the notch and out of the mounting groove 12, making it easier for the operator to press the grip portion 21 of the trigger 2.

[0053] The pressing rod 3 is arranged on the trigger 2, and the specific setting position of the pressing rod 3 on the trigger 2 can be set according to actual conditions. Figures 1 to 4 In this embodiment, the pressing rod 3 is disposed on the gripping portion 21 .

[0054] Specifically, the pressing rod 3 is disposed on the grip portion 21, which facilitates transmitting the pressing force applied to the trigger 2 to the sealing sleeve 4. A safety member 7 is disposed between the trigger 2 and the housing 1. The safety member 7 is used to limit the rotation of the trigger 2, effectively preventing the trigger 2 from being accidentally pressed. A limit hook 23 is provided on the trigger 2, and the housing 1 is provided with a snap groove (not shown). When the trigger 2 is in the initial position, the limit hook 23 forms a snap fit with the snap groove to limit the trigger 2 in the initial position. The safety member 7 and the limit hook 23 are located in front of the rotating shaft 22, and the pressing rod 3 is located in front of the safety member 7 and the limit hook 23.

[0055] Optionally, in this embodiment, a dustproof labyrinth structure is provided at the guide hole 11 .

[0056] Specifically, the original dustproof maze structure on the casing 1 can be retained, so that the dustproof maze structure and the sealing sleeve 4 form a double-layer dustproof mechanism. Even if some dust can pass through the sealing sleeve 4, the dustproof maze structure can isolate this part of the dust, thereby effectively improving the overall dustproof performance of the power tool 100.

[0057] The dustproof labyrinth structure may include a first dustproof rib arranged on the inner wall of the guide hole 11; the dustproof labyrinth structure may also include an annular groove arranged around the guide hole 11, and the annular convex edge 41 of the sealing sleeve 4 is located in the annular groove.

[0058] Optionally, see Figures 1 to 4 In this embodiment, the switch 5 includes a switch housing 51 and a switch body (not shown in the figure). The switch body is arranged in the switch housing 51. The switch housing 51 includes a switch box and a switch cover covering the switch box. The dust-proof maze structure includes a second dust-proof rib arranged between the switch box and the switch cover.

[0059] The utility model also provides an electric tool, which may be a grinder, etc. The electric tool includes a switch sealing structure. Since the switch sealing structure adopts the technical solution of the above embodiment, it has the beneficial effects brought by the technical solution of the above embodiment.

[0060] Optionally, in this embodiment, the power tool is a brushless DC power tool.

[0061] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A switch sealing structure, characterized in that: include: A casing, wherein a guide hole is provided through the casing; a trigger, the trigger being located outside the housing, one end of the trigger being rotatably mounted on the housing, a pressing rod being protruding from the trigger, and an end of the pressing rod away from the trigger being movably inserted into the guide hole along the axial direction of the pressing rod, and being configured to drive the pressing rod to move when the trigger is rotated, so as to trigger a switch located within the housing through the end of the pressing rod away from the trigger; A sealing sleeve is located outside the casing, the sealing sleeve is sleeved on the pressing rod, and one end of the sealing sleeve away from the trigger abuts against the outer wall of the casing.

2. The switch sealing structure according to claim 1, characterized in that: An annular convex edge is provided on the connection between the end surface of the sealing sleeve close to the housing and the outer peripheral surface, and the annular convex edge is in contact with the outer shell wall of the housing.

3. The switch sealing structure according to claim 2, characterized in that: The switch sealing structure also includes an elastic member, which is sleeved on the pressing rod, and the end of the elastic member close to the housing abuts against the side of the annular flange away from the housing, and the end of the elastic member away from the housing abuts against the connection between the pressing rod and the trigger.

4. The switch sealing structure according to claim 3, characterized in that: An annular protrusion is convexly provided on the peripheral side surface of one end of the pressing rod close to the trigger, and one end of the elastic member away from the housing abuts against a side of the annular protrusion close to the housing.

5. The switch sealing structure according to claim 4, characterized in that: An annular boss is provided on the peripheral side surface of the pressing rod at one end close to the trigger, and the annular boss is located on the side of the annular protrusion close to the housing. The end of the elastic member away from the housing is sleeved on the annular boss, and the elastic member and the annular boss form a snap fit.

6. The switch sealing structure according to claim 3, characterized in that: The elastic member is a spring.

7. The switch sealing structure according to claim 1, wherein: The sealing sleeve is a rubber sleeve.

8. The switch sealing structure according to claim 1, wherein: A mounting groove is provided on the outer shell wall of the casing, the trigger is rotatably provided at the mounting groove, the guide hole is provided on the bottom wall of the mounting groove, and the end of the sealing sleeve away from the trigger abuts against the bottom wall of the mounting groove.

9. The switch sealing structure according to claim 1, wherein: A rotation connection structure is provided between one end of the trigger and the housing, and a grip portion is provided at one end of the trigger away from the rotation connection structure. The grip portion is used for an operator to grip and rotate the pressing rod, and the pressing rod is provided on the grip portion.

10. An electric tool, characterized in that: The invention comprises a switch sealing structure according to any one of claims 1 to 9.

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