Handheld electric tool

Abstract

The utility model relates to a handheld electric tool which comprises a front shell and a rear shell which are connected through an elastic structure and can axially move relative to each other. The handheld electric tool further comprises at least one thrust indicator, and the thrust indicator comprises a marking part which is arranged on a first shell in the rear shell or the front shell. The indicating part is arranged on a second shell of the rear shell or the front shell, so that the marking part and the indicating part are located on the two sides of the elastic structure in the axial direction respectively, when the front shell is located at the free position farthest from the rear shell, the indicating part and the marking part have a first relative position, and when the front shell is located at the free position farthest from the rear shell, the indicating part and the marking part have a second relative position; and when the rear shell is close to the front shell under the action of thrust applied by the user, the indicating part and the marking part have a second relative position for indicating that the handheld electric tool meets the working thrust. By means of the handheld electric tool, the thrust applied by a user at present can be indicated, so that the magnitude of the current thrust can be visually known, and thrust adjustment is facilitated.

Description

Technical Field

[0001] The utility model generally relates to a handheld electric tool. Background Art

[0002] Handheld power tools are well known in the prior art, especially electric hammers, handheld impact drills, etc. For these handheld power tools, when using them to perform operations such as drilling on concrete or any other materials, appropriate thrust (feed force, which means the thrust applied by the user to the handheld power tool along the axial direction of the handheld power tool (e.g., corresponding to the axial direction of the motor therein)) is very important for the speed and power efficiency of the drilling operation.

[0003] Especially for handheld power tools such as electric hammers, they usually also include an impact system for causing an axial movement of a working head (such as a drill bit) to facilitate drilling of the working head during operations such as drilling. In this case, it is obvious that if the thrust (feed force) applied by the user to the tool is too small, the impact system will not be able to provide a stable impact force between the working head (such as a drill bit) and the object to be processed (such as a workpiece to be drilled). Therefore, the internal components of the handheld power tool such as the electric hammer will be subjected to unnecessary impact, thereby shortening the service life of the handheld power tool.

[0004] On the contrary, if the thrust (feed force) applied by the user to a handheld power tool such as an electric hammer is too large, the pressure or contact force between the working head and the object to be processed will be greater, which will make the friction force greater, especially when the working head rotates. Obviously, the rotational load of the motor of the handheld power tool will increase, so that the motor speed will be unexpectedly reduced, resulting in a decrease in the impact frequency and impact energy of the impact system. This is because when the battery power is stable, the total power that the motor can achieve is also generally stable. Due to the increase in friction, a certain part of the mechanical energy will be converted into heat energy and wasted, which passively leads to a decrease in the impact frequency and impact energy. In this case, the operating rate of the working head is also reduced. Even for a constantly controlled motor (that is, the motor speed is controlled to remain constant and therefore the impact frequency and impact are also maintained constant), this increased rotational load will also lead to an increase in power consumption, thereby reducing the overall power efficiency of the handheld power tool. Utility Model Content

[0005] The utility model relates to a handheld electric tool, which comprises a front shell and a rear shell, wherein the rear shell and the front shell are connected via an elastic structure and can move axially relative to each other; the handheld electric tool also comprises at least one thrust indicator, which comprises a marking portion, which is arranged on the rear shell or a first shell in the front shell; and an indicating portion, which is arranged on the rear shell or a second shell in the front shell, so that the marking portion and the indicating portion are respectively located at both sides of the elastic structure along the axial direction, wherein when the front shell is at a free position farthest from the rear shell, the indicating portion and the marking portion are in a first relative position to each other, and when the rear shell approaches the front shell under the action of a thrust applied by a user, the indicating portion is in a second relative position to the marking portion due to the approach so as to be able to indicate the value or range of the thrust applied by the user.

[0006] Optionally, the marking portion is constructed as a marking strip and extends at least a portion in the circumferential direction on the outer circumferential surface of the first shell, and / or the indicating portion is constructed as an indicating strip and extends a certain length in the axial direction on the outer circumferential surface of the second shell away from the second shell, wherein the indicating strip is constructed to cover at least a portion of the marking strip on the radial outside when the first shell and the second shell are in the second relative position due to their proximity to each other.

[0007] Optionally, the length of the indicator bar extending from the second shell is less than the maximum distance between the rear shell and the front shell in the free position, so that when the indicator bar and the marking bar cross each other in the second relative position, it indicates that the thrust applied by the user is within an appropriate range.

[0008] Optionally, the handheld power tool is constructed to achieve at least one of the following: the handheld power tool is an electric hammer; or the handheld power tool is a cordless tool.

[0009] Optionally, the marking portion is constructed to protrude and extend on at least a portion of the outer circumferential direction of the first shell and includes an opening passing through the marking portion, and the indicating portion is constructed as an indicating bar and is constructed to align with the opening of the marking portion so that the indicating portion passes through the opening when the marking portion and the indicating portion are in a second relative position.

[0010] Optionally, the indicator portion includes a thrust indicator portion so that the range or value of the thrust applied by the user is displayed when the indicator portion and the marking portion are in a second relative position, wherein the thrust indicator portion is selected as a scale to display the value of the applied thrust at the second relative position between the marking portion and the indicator portion based on the scale corresponding to the relative position of the marking portion and the indicator portion.

[0011] Optionally, the indicator portion includes a thrust indicator portion so that the range or value of the thrust applied by the user is displayed when the indicator portion and the marking portion are in the second relative position, wherein the thrust indicator portion is constructed as an opening opened in the indicator portion so that at least a portion of the marking portion can be observed through the opening when the marking portion and the indicator portion are in the second relative position, wherein the marking portion is coated with a single color or multiple color areas along the axial direction of the marking portion, so that when the marking portion and the indicator portion are in the second relative position, when a single color marking portion or a specific color area in the marking portion can be observed through the opening, it indicates that the thrust currently applied by the user is within an appropriate range.

[0012] Optionally, the indicator portion includes a thrust indicator portion so that the range or value of the thrust applied by the user is displayed when the indicator portion and the marking portion are in a second relative position, wherein along the dimension of the indicator portion in the axial direction, the indicator portion includes multiple color areas, so that when the marking portion and the indicator portion are in the second relative position, when a specific color area in the indicator portion is obscured by the marking portion, it indicates that the thrust currently applied by the user is within an appropriate range.

[0013] Optionally, the indicating portion further comprises a limiting portion, which is configured to protrude from the indicating portion and be movably attached to the indicating portion and capable of being locked to an appropriate position on the indicating portion, wherein a size of the limiting portion is configured to be larger than a size of the opening of the marking portion.

[0014] Optionally, a proximity sensor is provided in the marking portion to sense the proximity of the indicating portion to the marking portion to provide feedback as to whether the applied thrust is within an appropriate range.

[0015] With the help of the thrust indicator for the handheld power tool of the present application, it is possible to indicate the thrust currently applied by the user, so that the user can intuitively understand the magnitude of the thrust currently applied by the user, thereby facilitating the user to adjust the thrust. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other advantages and aspects of the present application will become more apparent with reference to the following detailed description made with reference to the accompanying drawings, in which:

[0017] Figure 1A An overall view of a handheld power tool with a thrust indicator according to an embodiment of the present invention is shown, wherein the handheld power tool is in a released state or a free position;

[0018] Figure 1B The handheld power tool in the released state according to the embodiment of the utility model is shown in FIG. Figure 1A An enlarged view of the thrust indicator in area A of FIG.

[0019] Figure 2AAn overall view of a handheld power tool with a thrust indicator according to an embodiment of the utility model is shown, wherein the handheld power tool is in a pushing state;

[0020] Figure 2B The handheld electric tool in a pushing state according to an embodiment of the utility model is shown. Figure 2A An enlarged view of the thrust indicator in area B in FIG.

[0021] Figure 3A A general view showing another type of handheld power tool having a thrust indicator according to an embodiment of the present invention, wherein the handheld power tool is in a released state; and

[0022] Figure 3B Another type of handheld power tool in a released state according to an embodiment of the utility model is shown. Figure 3A An enlarged view of the thrust indicator in area C of FIG. DETAILED DESCRIPTION

[0023] Throughout the present application, the same reference numerals denote the same or similar elements, parts or steps.

[0024] First, in the context of the present application, the axial direction refers to the direction from the working head of the handheld power tool to the handle system, and in certain cases also refers to the direction along which the drilled hole extends when the handheld power tool performs an operation such as drilling. The circumferential direction refers to the direction around the axial direction on a plane perpendicular to the axial direction, and the radial direction refers to the direction of the diameter of any circular cross-section around the axial direction on a plane perpendicular to the axial direction, wherein the radial inner side is closer to the surrounding axial direction.

[0025] Figure 1A An overall view of a handheld power tool with a thrust indicator according to an embodiment of the utility model is shown, wherein the handheld power tool is in a released state; Figure 1B A detailed view showing a thrust indicator of a handheld power tool in a released state according to an embodiment of the present invention; Figure 2A An overall view of a handheld power tool with a thrust indicator according to an embodiment of the utility model is shown, wherein the handheld power tool is in a pushing state; Figure 2B A detailed view showing a thrust indicator of a handheld power tool in a pushing state according to an embodiment of the utility model; Figure 3A A general view showing another type of handheld power tool having a thrust indicator according to an embodiment of the present invention, wherein the handheld power tool is in a released state; and Figure 3BA detailed view of a thrust indicator of another type of handheld power tool in a released state according to an embodiment of the present invention is shown.

[0026] In the following, we will combine Figure 1A-1B , 2A-2B, 3A-3B describe the thrust indicator for the handheld power tool of the present application. First of all, it should be understood that in the above and below of the present application, thrust, which may also be referred to as feed force, refers to the pushing force applied by the user to the handheld power tool along the axial direction of the handheld power tool, such as the extension direction of the drill hole in the drilling operation, so as to push the handheld power tool toward a workpiece to be drilled.

[0027] In the context of the present application, although the construction of the handheld power tool is described in particular by taking an electric hammer as an example, those skilled in the art will appreciate that the scope of the present application is not intended to be limited to an electric hammer, but may be applicable to any other possible handheld power tool, such as a handheld impact drill, without departing from the scope of the present application. Still more preferably, in an embodiment of the present application, the handheld power tool is a cordless handheld power tool, in particular a cordless electric hammer. In fact, for a cordless power tool, due to its limited power, it can significantly improve the efficiency of power under appropriate conditions, especially under appropriate pressure in the axial direction, so that the handheld power tool can achieve higher efficiency and save power in situations such as a single charge or a single battery replacement.

[0028] In addition, although the appearance and specific structure of the handheld power tool are specifically shown in the various drawings of the present application, these are not restrictive, and those skilled in the art can make various adaptive modifications to the structure of the handheld power tool without departing from the scope of the present application.

[0029] like Figure 1A-1B As shown in Figures 2A-2B, and in particular as shown in Figures 1A and 2A, the handheld power tool includes a front housing 1 and a rear housing 2. As known to those skilled in the art, the front housing 1 is constructed to include at least a working head for realizing the functions of the handheld power tool. In the embodiment of the present application, since the handheld power tool is selected as an electric hammer, the front housing 1 is particularly constructed to be able to realize an impact drilling operation, wherein the impact drilling operation means that an additional axial heavy striking action can be applied during the drilling operation to facilitate the drilling operation for high-hardness objects. Of course, this is only exemplary, and the handheld power tool may be selected as other power tools besides the electric hammer.

[0030] The rear housing 2 is configured to be held by a user for operation of the handheld power tool. As shown in the drawings of the present application, the handheld power tool includes a front housing 1 and a rear housing 2. As will be understood by those skilled in the art, in the embodiments of the present application, the front and rear are respectively defined along the axial direction of the handheld power tool and the front represents the side where the execution system for realizing the function of the handheld power tool (for example, including the working head of the handheld power tool, for example, including the hammer head in the case of an electric hammer) is located and the rear represents the side where the handle system of the handheld power tool is located. It should be understood that components such as motors, brushes, wiring, etc. for the handheld power tool can be accommodated in the space defined by the front housing 1 and the rear housing 2.

[0031] In the embodiment of the present application, the front housing 1 is connected to the rear housing 2 via an elastic mechanism 3, and the elastic mechanism 3 is configured to be compressively arranged between the rear housing 2 and the front housing 1 to, for example, absorb and buffer the impact of the vibration generated by the front housing 1 when performing an operation on the user's side. As will be understood by those skilled in the art, the elastic mechanism 3 is configured to absorb vibration by compression or release of the elastic mechanism 3.

[0032] In this case, when a thrust is applied to the handheld power tool for operation, the rear housing 2 can be close to the front housing 1 due to the compression of the elastic mechanism 3. Conversely, when the thrust is released from the handheld power tool, the rear housing 2 can move away from the front housing 1 to a free position or an original position due to the release of the elastic mechanism 3.

[0033] exist Figure 1A-1B In the embodiments of 2A-2B, the handheld power tool further comprises a thrust indicator, which comprises a marking portion 5, which is arranged on the rear housing 2, especially on its outer peripheral surface; and an indicating portion 4, which is arranged on the front housing 1, especially on its outer peripheral surface and corresponds to the position of the marking portion 5, so that the marking portion 5 and the indicating portion 4 are respectively located at both sides of the elastic mechanism 3 and when the rear housing 2 is in a free position, the indicating portion 4 and the marking portion 5 are in a first relative position to each other and when the rear housing 2 is close to the front housing 1 under the thrust applied by the user, the indicating portion 4 will be close to the marking portion 5 due to the close proximity (see Figure 2A-2B ) is in a second relative position, at least in this second relative position, it is possible to indicate a range or value of the thrust, and in particular to indicate that the thrust is in an appropriate range.

[0034] exist Figure 1A-1B In the embodiments of 2A-2B, the marking portion 5 is configured as a marking strip and extends along at least a portion of the circumferential direction on the outer circumferential surface of the rear housing 2. Figure 1A-1BIn the embodiments of 2A-2B, the marking strip is, for example, configured to protrude and extend radially outward from the outer peripheral surface of the rear housing 2. Alternatively, the marking strip may also be configured to be recessed and extend radially outward from the outer peripheral surface of the rear housing 2 to form a groove, configured to be a slit disposed along at least a portion of the circumferential direction of the outer peripheral surface of the rear housing 2, or configured to be a surface pattern disposed along at least a portion of the circumferential direction of the outer peripheral surface of the rear housing 2, without departing from the scope of the present application. Preferably, the marking strip is configured to be as flat as possible without increasing or significantly increasing the space occupied by the handheld power tool.

[0035] Although in Figure 1A-1B In the embodiments of 2A-2B, the marking strip is constructed to be integrally constructed with the outer peripheral surface of the rear shell 2, but this is only exemplary. Alternatively, the marking strip can be constructed to be manufactured separately from the rear shell 2 and attached to the outer peripheral surface of the rear shell 2. As an example and limitation, the marking strip is attached to the outer peripheral surface of the rear shell 2 by bonding, screwing, snap-on connection, etc. In addition, optionally, in order to make the marking strip more clearly visible to the user, the marking strip can be coated with a selected color to distinguish it from the rear shell 2. It can be imagined that along the width (dimension in the axial direction) of the marking strip, the entire marking strip can be selectively coated with only a single color or multiple color areas.

[0036] In this case, Figure 1A-1B And in the embodiments of 2A-2B, the indicating portion 4 is constructed as an indicating strip and extends in the axial direction on the outer peripheral surface of the front shell 1 to a certain length away from the front shell 1. Preferably and as an example, the length is less than the spacing between the rear shell 2 and the front shell 1 in the free position. In other words, in the first relative position, the indicating portion 4 and the marking portion 5 are separated from each other and do not interfere with each other. The advantage of this construction is that when the indicating portion 4 and the marking portion 5 are in the second relative position and cross each other, especially orthogonally cross, it can be indicated that sufficient thrust has been applied to the handheld power tool. Of course, this is merely exemplary, and any other embodiments in which the indicating portion 4 and the marking portion 5 have crossed each other, especially orthogonally crossed in the first relative position can be conceived without departing from the scope of the present application.

[0037] exist Figure 1A-1B In the embodiments of 2A-2B, the indicator strip is configured to cover at least a portion of the marking strip at the top, i.e., radially outward, when the front housing 1 and the rear housing 2 are in the second relative position due to the proximity of the front housing 1 and the rear housing 2 so that the indicator strip and the marking strip intersect with each other (see Figure 2A-2B), especially orthogonally crossed. Optionally, the indicator strip can be constructed to be manufactured separately from the front shell 1 and attached to the outer peripheral surface of the front shell 1. As an example and limitation, the indicator strip is attached to the outer peripheral surface of the front shell 1 by adhesive connection, screw connection, snap connection, etc. In addition, optionally, in order to make the indicator strip more clearly visible to the user, the indicator strip can be coated with another selected color to distinguish it from the front shell 1. It is conceivable that along the length of the indicator strip (the dimension in the axial direction), the entire indicator strip can be selectively coated with only a single color or multiple color areas. Preferably, for the embodiment of the indicator strip and the marking strip coated with a single color, the color of the indicator strip is different from the color of the marking strip.

[0038] As will be understood by those skilled in the art, although the marking portion 5 is described herein as being disposed on the outer peripheral surface of the rear shell 2 and the indicating portion 4 is disposed on the outer peripheral surface of the front shell 1, this is merely exemplary and the positions of the marking portion 5 and the indicating portion 4 may be interchanged without departing from the scope of the present application.

[0039] As will be understood by those skilled in the art, although the marking portion 5 is described herein as being disposed on the outer peripheral surface of the rear housing 2 and the indicating portion 4 is disposed on the outer peripheral surface of the front housing 1, this is merely illustrative, and in fact, the marking portion 5 and the indicating portion 4 may be disposed at any appropriate position of the front housing 1 and the rear housing 2 according to the configuration without departing from the scope of the present application. As a variation, the indicating portion 4 may be configured to extend integrally from the end surface of the rear housing 2 opposite to the front housing 1 and the marking portion 5 may be configured as an opening opened in the end surface of the front housing 1 opposite to the rear housing 2 so that a cavity capable of accommodating the axial displacement of the indicating portion 4 is disposed inside the front housing 1.

[0040] Figure 3A-3B The construction and Figure 1A-1B as well as Figure 2A-2B The structure of the indicator in is basically the same, and the only difference is the structure of the handheld power tool, which will not be further described here. Figure 3A-3B In the embodiment, it can be clearly found that the indicating portion 4 is constructed as an indicating strip and extends in the axial direction on the outer peripheral surface of the rear shell 2 to a certain length away from the rear shell 2. Preferably and as an example, the length is less than the distance between the rear shell 2 and the front shell 1 in the free position. In other words, in the first relative position, the indicating portion 4 and the marking portion 5 are separated from each other and do not interfere with each other, and when the indicating portion 4 and the marking portion 5 cross each other in the second relative position, especially when they cross or orthogonally, it indicates that sufficient thrust has been applied to the handheld power tool. Of course, this is only exemplary, and it can be imagined that in the first relative position, the indicating portion 4 and the marking portion 5 have crossed each other, and the range of thrust can be indicated by means of the relative position between the indicating portion 4 and the marking portion 5.

[0041] Although the thrust indicator of the present application is described above with reference to the various drawings of the present application, the above-mentioned configuration is merely exemplary and various modifications may exist.

[0042] In the above embodiment, the indicating portion 4 is configured as an indicating strip and the marking portion 4 is configured as a marking strip, and the indicating strip is configured to cover at least a portion of the marking strip at the top, i.e., radially outward, when in the second relative position. However, as a variation, the indicating portion 4 is configured to pass through an opening provided in the marking portion 5 when in the second relative position. In other words, in this variation, the marking portion 5 is configured to protrude and extend along at least a portion of the circumferential direction on the outer peripheral surface of the front housing and include an opening passing through the marking portion 5. Accordingly, the indicating portion 4 is still configured as an indicating strip and is configured to align with the corresponding opening of the marking portion 5 so that the indicating portion 4 passes through the opening when the marking portion 5 and the indicating portion 4 are in the second relative position.

[0043] Optionally, in all embodiments of the present application, the indicator 4 may include a thrust indicator (not shown) to display the range or value of the thrust applied by the user when the indicator 4 is at the second relative position to the marking portion 5. As an example, the thrust indicator is selected as a scale to reflect the range or value of the thrust applied by the user by means of the scale position of the marking portion 5 on the indicator 4 at the second relative position between the marking portion 5 and the indicator 4.

[0044] It is also conceivable that, in the case where the indicator portion 4 is configured as an indicator bar and the marking portion 4 is configured as a marking bar, and the indicator bar is configured to cover at least a portion of the marking bar when in the second relative position, the thrust indicator portion can be selected as an opening opened on the indicator portion 4, so that when the marking portion 5 and the indicator portion 4 are in a cross position with each other and the thrust applied by the user is in an appropriate range, at least a portion of the marking portion 5 can be observed through the opening, which is particularly advantageous for the color-coated marking portion 5. Specifically, when the user applies a thrust in the axial direction to the handheld power tool so that the marking bar and the indicator portion are in the second relative position, the marking portion 5, especially the marking portion 5 of a specific color or a specific color portion in the marking portion 5, such as a green marking portion 5 or a green area in the marking portion 5, can be observed through the opening, indicating that the thrust currently applied by the user is in a preferred or appropriate range, that is, in a range that helps to achieve the operation of the handheld power tool.

[0045] It can also be imagined that in the case where the indicating portion 4 is constructed to pass through the marking portion 5, that is, the indicating portion 4 is constructed as an indicating bar and the marking portion 5 is constructed to protrude and extend on at least a portion of the outer circumferential direction on the outer circumferential surface of a front shell, such as and includes an opening passing through the marking portion 5, or the marking portion 5 is constructed as an opening opened in the end surface of the front shell 1 opposite to the rear shell 2, along the dimension of the indicating portion in the axial direction, the indicating portion includes multiple color areas and when the user applies a thrust in the axial direction to the handheld power tool, if a specific color area in the indicating portion 4 is obscured by the marking portion 5, it indicates that the thrust currently applied by the user is in a preferred or appropriate range, that is, in a range that facilitates the operation of the handheld power tool.

[0046] Optionally, in an embodiment of the present application, the indicator portion 4 may include a limiting portion, which is configured to protrude from the indicator portion 4 and is configured to be movably attached to the indicator portion 4 and can be locked to an appropriate position on the indicator portion 4, wherein the size of the limiting portion is configured to be larger than the size of the opening in the marking portion 5, so that when the limiting portion passes through the opening in the marking portion 5, the maximum penetration degree of the indicating portion 4 is limited, thereby indicating that the user will not apply excessive thrust to the handheld power tool, thereby affecting the efficiency of the tool, etc. For example, in actual use, it is usually desired that the limiting portion is as close to the marking portion 5 as possible but does not squeeze the marking portion 5. Obviously, the closer the locking position of the limiting portion is to the position where the indicator portion 4 is attached to the housing, the greater the thrust that can be applied to the handheld power tool. The limiting portion is preferably selected as an elastic component so that it is possible to determine whether the currently applied thrust is too large or insufficient by observing the deformation of the limiting portion.

[0047] Of course, optionally and conceivably, a sensor, such as a proximity sensor, may also be provided in the marking portion 5 to sense the proximity of the indicator portion 4 to the marking portion 5 to provide feedback on whether the applied thrust is within an appropriate range. The proximity sensor is configured to provide a feedback signal when the indicator portion 4 reaches a desired proximity, such as by lighting up an indicator light or changing the color of the indicator light, to inform the user that the currently applied thrust meets the requirements.

[0048] Of course, optionally and conceivably, a near-field sensor and a corresponding sensing circuit are respectively provided in the indicating portion and the marking portion, so that when the indicating portion and the marking portion are in the second relative position, the interaction between the near-field sensor and the corresponding sensing circuit can electronically display that the handle system and the execution system are close enough to meet the thrust requirement.

[0049] Optionally, the indicating portion 4 and the marking portion 5 are arranged on the top side of the handheld power tool, which top side, for example, represents the side of the handheld power tool opposite to the extension direction of the handle of the rear shell 2, so that the user can easily see the indication of the thrust indicator when using the handheld power tool.

[0050] Optionally, although only a single thrust indicator is described in the embodiments of the present application, this is merely exemplary. In fact, the handheld power tool may include two or more thrust indicators at the same time to facilitate the user to observe the application of thrust from different angles.

[0051] Optionally, the indicating portion 4 of the thrust indicator may also be configured as a ring rather than a bar, and a slot may be provided in the indicating portion 4 along the axial direction of the handheld power tool to display the position of the marking portion 5 in the indicating portion 4. In this case, when the indicating portion 4 and the marking portion 5 are in the second relative position, the indicating portion 4 completely covers the entire marking portion 5 so that the relative position of the marking portion 5 and the indicating portion 4 can only be observed through the slot of the indicating portion 4. In fact, in this case, the indicating portion 4 is configured as a cylindrical portion extending circumferentially from the rear housing 2, and its size is larger than the size of the end face of the front housing 1 opposite to the rear housing 2 so that the front housing 1 can be at least partially displaced into the indicating portion 4 in the second relative position.

[0052] It should be understood that in the context of the present application, descriptions such as appropriate thrust or an appropriate range of thrust or thrust meeting requirements mean that the thrust currently applied is neither too large to cause increased friction and reduce the efficiency of the handheld power tool nor too small to provide a stable impact force for operations such as impact operations, that is, the thrust range when the operating efficiency of the handheld power tool is in a high state.

[0053] Although specific embodiments of the present application are described in the above embodiments, those skilled in the art should be aware that these are merely exemplary.

Claims

1. A handheld electric tool, comprising a front housing (1) and a rear housing (2), wherein the rear housing (2) and the front housing (1) are connected via an elastic structure (3) and are capable of axial movement relative to each other; characterized in that: The handheld power tool further comprises at least one thrust indicator, which comprises a marking portion (5) which is arranged on a first shell of the rear shell or the front shell; and an indicating portion (4) which is arranged on a second shell of the rear shell or the front shell, so that the marking portion (5) and the indicating portion (4) are respectively located on both sides of the elastic structure (3) in the axial direction, wherein when the front shell (1) is in a free position farthest from the rear shell (2), the indicating portion (4) and the marking portion (5) have a first relative position to each other, and when the rear shell (2) approaches the front shell (1) under the thrust applied by the user, the indicating portion (4) and the marking portion (5) have a second relative position indicating that the handheld power tool meets the working thrust.

2. The handheld power tool according to claim 1, characterized in that: The marking portion (5) is constructed as a marking strip and extends along at least a portion of the circumferential direction on the outer circumferential surface of the first shell, and / or the indicating portion (4) is constructed as an indicating strip and extends along the axial direction on the outer circumferential surface of the second shell to a certain length away from the second shell, wherein the indicating strip is constructed to cover at least a portion of the marking strip on the radial outside when the first shell and the second shell are in the second relative position due to the proximity of the first shell and the second shell.

3. The handheld power tool according to claim 2, characterized in that: The length of the indicator bar extending from the second shell is less than the maximum distance between the rear shell (2) and the front shell (1) in the free position, so that when the indicator bar and the marking bar intersect each other in the second relative position, it indicates that the thrust applied by the user is within an appropriate range.

4. The handheld power tool according to claim 1, characterized in that The handheld power tool is an electric hammer; and / or the handheld power tool is a cordless tool.

5. The handheld power tool according to claim 1, characterized in that: The marking portion (5) is configured to protrude and extend from at least a portion of the outer peripheral surface of the first shell in the circumferential direction and include an opening passing through the marking portion (5), and the indicating portion (4) is configured as an indicating bar and is configured to be aligned with the opening of the marking portion (5) so that the indicating portion passes through the opening when the marking portion (5) and the indicating portion (4) are in the second relative position.

6. The handheld power tool according to any one of claims 2 to 5, characterized in that: The indicating portion includes a thrust indicator portion so as to display the range or value of the thrust applied by the user when the indicating portion (4) and the marking portion (5) are in the second relative position, wherein the thrust indicator portion is selected as a scale to display the value of the thrust applied at the second relative position between the marking portion (5) and the indicating portion (4) based on the scale corresponding to the relative position of the marking portion (5) and the indicating portion (4).

7. The handheld power tool according to claim 2, characterized in that: The indicating portion (4) comprises a thrust indicator portion so that when the indicating portion (4) and the marking portion (5) are in the second relative position, the range or value of the thrust applied by the user is displayed, wherein the thrust indicator portion is constructed as an opening opened in the indicating portion (4) so ​​that when the marking portion (5) and the indicating portion (4) are in the second relative position, at least a portion of the marking portion (5) can be observed through the opening, wherein along the dimension of the marking portion (5) along the axial direction, the marking portion (5) is coated with a single color or multiple color areas, so that when the marking portion (5) and the indicating portion (4) are in the second relative position, when the marking portion (5) of a single color or a specific color area in the marking portion (5) can be observed through the opening, it indicates that the thrust currently applied by the user is within an appropriate range.

8. The handheld power tool according to claim 5, characterized in that: The indicating portion (4) includes a thrust indicator portion so that when the indicating portion (4) and the marking portion (5) are in the second relative position, the range or value of the thrust applied by the user is displayed, wherein along the dimension of the indicating portion (4) along the axial direction, the indicating portion (4) includes a plurality of color areas, so that when the marking portion (5) and the indicating portion (4) are in the second relative position, when a specific color area in the indicating portion (4) is shielded by the marking portion (5), it indicates that the thrust currently applied by the user is within an appropriate range.

9. The handheld power tool according to claim 5, characterized in that: The indicating portion (4) further comprises a limiting portion, which is configured to protrude from the indicating portion (4) and be movably attached to the indicating portion (4) and capable of being locked to an appropriate position on the indicating portion (4), wherein the size of the limiting portion is configured to be larger than the size of the opening in the marking portion (5).

10. The handheld power tool according to any one of claims 1 to 5, characterized in that: A proximity sensor is provided in the marking portion (5) to sense the proximity of the indicating portion (4) to the marking portion (5) to provide feedback on whether the applied thrust is within an appropriate range.

Images