Holding device, leg mechanism and lever

Abstract

The lever used to switch between the locked and unlocked states of the leg rest will be made easier for the user to operate. [Solution] A holding device comprising three legs 10 that are extendable and each includes an upper section 11, a middle section 12, and a lower section 13 that extend in the direction of extension and retraction, and three levers 13 for switching between a released state in which the middle section 12 and the lower section 13 are movable and a fixed state in which the middle section 12 and the lower section 13 are fixed, wherein each lever 13 includes a plate-shaped gripping section 131 that is grasped by the user, and a support section 132 to which the gripping section 131 is connected and which is rotatably connected to the legs 10 about a central axis P, wherein the gripping section 131 includes a first recess G1 provided on the peripheral edge R1 and a second recess G2 provided on the peripheral edge R2.

Description

Technical Field

[0001] The present invention relates to a technology of a holding device for holding an imaging device.

Background Art

[0002] Various holding devices for holding an imaging device (e.g., a camera) have been conventionally proposed. For example, Patent Document 1 discloses a tripod having three legs whose lengths can be changed (i.e., telescopic). Each leg includes an upper segment, a middle segment, and a lower segment. In a released state where the length of each leg can be changed, the middle segment is movable relative to the upper segment, and the lower segment is movable relative to the middle segment. On the other hand, in a fixed state where the length of each leg is fixed, the middle segment is fixed relative to the upper segment, and the lower segment is fixed relative to the middle segment. That is, in the released state, the middle segment and the lower segment are in a movable state, and in the fixed state, the middle segment and the lower segment are in a fixed state.

[0003] In the technology of Patent Document 1, the user can switch between the fixed state and the released state by gripping and operating a lever provided on the leg.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the lever of Patent Document 1 has a problem that the portion that the user grips with a finger is flat, making it difficult for the user to operate. In view of the above circumstances, an object of the present invention is to make it easier for the user to operate a lever for switching between the fixed state and the released state of the leg.

Means for Solving the Problems

[0006] [1] A device for holding an imaging device, comprising three legs that are extendable and extendable, each including an upper section, a middle section, and a lower section, and three levers provided on each of the three legs for switching between a release state in which the length of the leg can be extended and a fixed state in which the length of the leg is fixed, wherein in the release state, the middle section is movable relative to the upper section, and the lower section is movable relative to the middle section, and in the fixed state, the middle section is fixed relative to the upper section, and the lower section is fixed relative to the middle section. A holding device in which a stepped portion is fixed, the lever includes a plate-shaped gripping portion that is grasped by a user, and a support portion to which the gripping portion is connected and which is rotatably connected to the leg portion about a central axis, the release state and the fixed state can be switched depending on the angle at which the user who is grasping the gripping portion rotates the lever, the gripping portion includes an opposing surface that faces the leg portion when in the fixed state, and the opposing surface includes a first recess provided on one peripheral edge in a direction parallel to the central axis and a second recess provided on the other peripheral edge in a direction parallel to the central axis.

[0007] [2] A retaining device of [1] including a third recess provided on the peripheral edge of the opposing surface opposite to the support portion.

[0008] [3] The width of the third recess gradually narrows from the peripheral edge of the opposing surface opposite to the support portion toward the support portion, and the first recess and the second recess are located on opposite sides of the third recess on the opposing surface, the retaining device of [2].

[0009] [4] The holding device of [1] wherein the portion of the gripping part on the side opposite to the opposing surface protrudes in the portion corresponding to the first recess and the second recess.

[0010] [5] The device is extendable and comprises three legs including an upper section, a middle section, and a lower section extending in the direction of extension and retraction, and a lever provided on the leg for switching between a released state in which the length of the leg can be extended and a fixed state in which the length of the leg is fixed, wherein in the released state the middle section is movable relative to the upper section and the lower section is movable relative to the middle section, wherein in the fixed state the middle section is fixed relative to the upper section and the lower section is fixed relative to the middle section, and the lever is operated by the user A leg mechanism comprising a plate-shaped gripping portion for gripping, and a support portion to which the gripping portion is connected and which is rotatably connected to the leg portion about a central axis, wherein the release state and the fixed state can be switched depending on the angle at which the user gripping the gripping portion rotates the lever, the gripping portion includes an opposing surface that faces the leg portion when in the fixed state, and the opposing surface includes a first recess provided on one peripheral edge in a direction parallel to the central axis and a second recess provided on the other peripheral edge in a direction parallel to the central axis.

[0011] [6] A lever for switching between a release state in which the length of the legs can be extended and a fixed state in which the length of the legs is fixed, with respect to three legs including an upper section, a middle section, and a lower section that are extendable and extendable in the direction of extension and retraction, wherein in the release state the middle section is movable relative to the upper section and the lower section is movable relative to the middle section, and in the fixed state the middle section is fixed relative to the upper section and the lower section is fixed relative to the middle section, comprising a plate-shaped gripping portion for gripping by a user and a support portion to which the gripping portion is connected and which is connected to the legs, wherein the gripping portion includes a first recess provided on one side of the periphery in a direction parallel to the central axis and a second recess provided on the other side of the periphery in a direction parallel to the central axis. [Effects of the Invention]

[0012] According to the present invention, the lever for switching between the fixed and unlocked states of the leg becomes easier for the user to operate. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view of the holding device according to an embodiment. [Figure 2] This is a perspective view of the leg portion according to the embodiment. [Figure 3] This is a perspective view of the lever according to the embodiment. [Figure 4] This is a front view of the lever according to the embodiment. [Figure 5] This is a side view of the lever according to the embodiment. [Figure 6] This is a side view of the lever according to the embodiment. [Figure 7] This is a bottom view of the lever according to the embodiment. [Figure 8] This is a rear view of the gripping portion according to the embodiment. [Modes for carrying out the invention]

[0014] Figure 1 is a perspective view of the holding device 100 according to this embodiment. The holding device 100 is a device for holding an imaging device (e.g., a camera). In this embodiment, a so-called tripod is exemplified as the holding device 100.

[0015] As illustrated in Figure 1, the holding device 100 comprises three extendable legs 10, three levers 20 provided on each of the three legs 10, and a connecting part 30 that connects the three legs 10. Various connecting devices (e.g., a tripod head or adapter) for mounting an imaging device are installed on the connecting part 30, and the imaging device is fixed to the holding device 100 via these connecting devices.

[0016] Figure 1 shows the X-direction in which the leg portion 10 extends, the positive end of the leg portion 10 in the X-direction (end T1), and the negative end of the leg portion 10 in the X-direction (end T2). The three leg portions 10 are connected by a connecting portion 30 at the end T1 side. Typically, the three leg portions 10 are connected to the connecting portion 30 such that each of the end T2s of the three leg portions 10 rotates toward and away from each other.

[0017] Each leg portion 10 can switch between a state where its length can be changed (hereinafter referred to as the "released state") and a state where the length of each leg portion 10 is fixed (hereinafter referred to as the "fixed state"). FIG. 1 is a view of the state where each leg portion 10 is extended to a certain extent.

[0018] In the following description, since the three leg portions 10 have the same configuration, the description will be made by focusing on one leg portion 10. FIG. 2 is a perspective view focusing on one leg portion 10. The leg portion 10 of the present embodiment includes, for example, an upper stage portion 11, a middle stage portion 12, and a lower stage portion 13 extending along the X direction. When the leg portion 10 is most extended, the upper stage portion 11, the middle stage portion 12, and the lower stage portion 13 are positioned in this order from the side of the connecting portion 30.

[0019] In the following description, one end of the upper stage portion 11 is denoted as "end E1", the other end of the upper stage portion 11 is denoted as "end E2", one end of the middle stage portion 12 is denoted as "end E3", the other end of the middle stage portion 12 is denoted as "end E4", one end of the lower stage portion 13 is denoted as "end E5", and the other end of the lower stage portion 13 is denoted as "end E6". End E1, end E3, and end E5 are the ends on the side of the connecting portion 30 (the positive side in the X direction). End E2, end E4, and end E6 are the ends on the side opposite to the connecting portion 30 (the negative side in the X direction). The end T1 of the leg portion 1 is the end E1 of the upper stage portion 11, and the end T2 of the leg portion 10 is the end E6 of the lower stage portion 13.

[0020] In the released state, the middle stage portion 12 is movable with respect to the upper stage portion 11, and the lower stage portion 13 is movable with respect to the middle stage portion 12. That is, in the released state, both the middle stage portion 12 and the lower stage portion 13 can move. On the other hand, in the fixed state, the middle stage portion 12 is fixed with respect to the upper stage portion 11, and the lower stage portion 13 is fixed with respect to the middle stage portion 12. That is, in the fixed state, the movement of the middle stage portion 12 and the lower stage portion 13 is inhibited.

[0021] The upper section 11 of this embodiment includes, for example, an axial first member 111, a second member 112, and a first connecting section 113 along the X direction. The first member 111 and the second member 112 are spaced apart. The shapes of the first member 111 and the second member 112 are not particularly limited and may be cylindrical or polygonal. The first connecting section 113 is an element that connects the first member 111 and the second member 112 and is located on the end E2 side of the upper section 11. Specifically, the first connecting section 113 connects the first member 111 and the second member 112 at the negative end in the X direction.

[0022] The middle section 12 includes a third member 121, a fourth member 122, a second connecting section 123, and a third connecting section 124. The third member 121 and the fourth member 122 are axial members aligned in the X direction. As illustrated in Figure 2, the third member 121 and the fourth member 122 are movable along the X direction between the first member 111 and the second member 112. The shapes of the third member 121 and the fourth member 122 are not particularly limited and may be cylindrical or polygonal prisms.

[0023] The second connecting portion 123 and the third connecting portion 124 are elements that connect the third member 121 and the fourth member 122. The second connecting portion 123 connects the third member 121 and the fourth member 122 at the end E3 side of the middle section 12. Furthermore, the second connecting portion 123 is connected to the first member 111 and the second member 112 of the upper section 11 so that it can move along the X direction. In other words, the middle section 12 and the upper section 11 are connected so that the middle section 12 can move relative to the upper section 11. The third connecting portion 124 connects the third member 121 and the fourth member 122 at the end E4 side of the middle section 12.

[0024] The lower section 13 includes an axial fifth member 131 aligned with the X direction. The fifth member 131 is connected to the third connecting section 124 between the third member 121 and the fourth member 122 so as to be movable along the X direction. That is, the lower section 13 is connected to the middle section 12 so as to be movable relative to the middle section 12.

[0025] In the released state, the leg portion 10 can be extended or retracted by changing the overlapping range of the upper portion 11 and the middle portion 12, and by changing the overlapping range of the middle portion 12 and the lower portion 13. The overlapping range of the upper portion 11 and the middle portion 12 is the range in which the upper portion 11 and the middle portion 12 are in the same position in the X direction, and the overlapping range of the middle portion 12 and the lower portion 13 is the range in which the middle portion 12 and the lower portion 13 are in the same position in the X direction.

[0026] Switching between the unlocked state and the locked state can be done using the lever 20. Specifically, the common lever 20 can be used to lock the middle section 12 and the lower section 13, and also to release the lock on the middle section 12 and the lower section 13.

[0027] Lever 20 is an operating device operated by the user to switch between a released state and a fixed state. Lever 20 is provided on the leg portion 10. In this embodiment, lever 20 is provided on the end E3 side of the middle section 12. Specifically, lever 20 is provided on the second connecting portion 123 located on the end E3 side of the middle section 12.

[0028] Figures 3 to 7 show the lever 20 viewed from different directions. Specifically, the lever 20 comprises a gripping portion 21 and a support portion 22. The gripping portion 21 is a plate-shaped part that the user grips. The support portion 22 is connected to the middle section 12 (second connecting portion 123) so as to be rotatable around the central axis P. The gripping portion 21 is connected to the support portion 22. Therefore, by gripping and operating the gripping portion 21, the entire lever 20 rotates around the central axis P.

[0029] Figures 3 to 7 illustrate the Y and Z directions. The Y direction is parallel to the central axis P and perpendicular to the X direction. The Z direction is perpendicular to both the X and Z directions. Figure 3 is a perspective view of the lever 20, Figure 4 is a front view of the lever 20 viewed from the negative Z direction, Figure 5 is a side view of the lever 20 viewed from the positive Y direction, Figure 6 is a side view of the lever 20 viewed from the negative Y direction, and Figure 7 is a bottom view of the lever 20 viewed from the negative X direction.

[0030] Figures 3 to 7 show the lever 20 in its fixed state. The gripping portion 21 is positioned opposite the middle section 12 when it is fixed. The surface of the gripping portion 21 that faces the leg portion 10 when it is fixed is denoted as the first surface F1 (an example of an "opposing surface"), and the surface opposite to the first surface F1 (the surface on the opposite side of the opposing surface from the middle section 12) is denoted as the second surface F2. In this embodiment, since the lever 20 is provided on the middle section 12, the first surface F1 is the surface that faces the middle section 12.

[0031] Figures 3 to 7 illustrate the positive peripheral edge R1 in the Y direction of the gripping portion 21 (an example of "one peripheral edge in a direction parallel to the central axis"), the negative peripheral edge R2 in the Y direction of the gripping portion 21 (an example of "the other peripheral edge in a direction parallel to the central axis"), and the negative peripheral edge R3 in the X direction of the gripping portion 21 (an example of "the peripheral edge opposite to the support portion 22").

[0032] As shown in Figure 3, the lever 20, which is located opposite the middle section 12 and is in a fixed position, is rotated (in the direction of the arrow in the figure) to move the position of the peripheral edge R3 of the gripping section 21 from the negative side to a predetermined position on the positive side in the X direction, thereby releasing it. The user gripping the gripping section 21 can switch between the released and fixed states depending on the angle at which they rotate the lever 20. The gripping section 21 is in a fixed state when the peripheral edge R3 is located furthest to the negative side in the X direction, and it is released when the lever 20 is rotated from the fixed state and the position of the peripheral edge R3 moves to the positive side in the X direction.

[0033] As illustrated in Figure 4, the gripping portion 21 is positioned to overlap the middle section 12 in a front view. The width (length in the Y direction) of the gripping portion 21 is, for example, smaller than the width of the middle section 12 (second connecting portion 123). The length (length in the X direction) of the gripping portion 21 is set such that, for example, the peripheral edge R3 of the gripping portion 21 is located on the negative side in the X direction than the negative end of the second connecting portion 123 in the X direction. However, the size of the gripping portion 21 is not limited to the above examples as long as it is possible for the user to grip it.

[0034] As illustrated in Figures 3 to 7, the gripping portion 21 includes a first recess G1 and a second recess G2. The first recess G1 is provided on the peripheral edge R1 side, and the second recess G2 is provided on the peripheral edge R2 side. The first recess G1 and the second recess G2 are the parts into which fingers are inserted and hooked when gripping the gripping portion 21.

[0035] The first recess G1 and the second recess G2 are provided symmetrically with respect to a straight line passing through the center of the gripping portion 21 in the Y direction. That is, in this embodiment, the shape of the first recess G1 when viewed from the positive side in the Y direction and the shape of the second recess G2 when viewed from the negative side in the Y direction are typically the same. However, it is not essential that the first recess G1 and the second recess G2 have symmetrical shapes.

[0036] As illustrated in Figure 5, the first recess G1 is a recess on the first surface F1 that is recessed away from the middle section 12. When viewed from the positive side in the Y direction, the first recess G1 is formed, for example, from a position corresponding to the negative end in the X direction of the second connecting section 123 of the peripheral edge R1 to the negative end D1b in the X direction of the peripheral edge R1. In this embodiment, in a side view, the portion of the peripheral edge R1 corresponding to the first recess G1 is formed to be recessed away from the leg section 10 (middle section 12). In this embodiment, the negative end D1b in the X direction of the peripheral edge R1 is located closer to the surface of the middle section 12 (third member 121) than the most recessed portion D1a in the portion of the peripheral edge R1 where the first recess G1 is formed. Therefore, it is easy for the user to grip the portion D1a with their fingers.

[0037] As illustrated in Figure 6, the second recess G2 is a recess on the first surface F1 that is recessed away from the middle section 12. When viewed from the negative side in the Y direction, the second recess G2 is formed, for example, from a position corresponding to the negative end in the X direction of the second connecting section 123 of the peripheral edge R2 to the end D2b on the negative side in the X direction of the peripheral edge R2. In this embodiment, in a side view, the portion of the peripheral edge R2 corresponding to the second recess G2 is formed to be recessed away from the leg section 10 (middle section 12). In this embodiment, the end D2b on the negative side in the X direction of the peripheral edge R2 is located closer to the surface of the middle section 12 (fourth member 122) than the most recessed portion D2a in the portion of the peripheral edge R2 where the second recess G2 is formed. Therefore, it is easy for the user to grip the portion D2a with their fingers.

[0038] As illustrated in Figure 7, the first surface F1 further includes a third recess G3 provided in the peripheral edge R3. The third recess G3 is also a portion into which fingers are inserted and hooked when gripping the gripping portion 21. The third recess G3 is a recess in the first surface F1 that is recessed in a direction away from the middle section 12 (second connecting portion 123). When viewed from the negative side in the X direction, the portion of the peripheral edge R3 corresponding to the third recess G3 is formed to be recessed on the opposite side from the second connecting portion 123. The portion of the peripheral edge R3 corresponding to the third recess G3 is formed to form a curve.

[0039] Figure 8 is a rear view of the gripping portion 21 when viewed from the positive side in the Z direction (viewed from the middle portion 12 side). As illustrated in Figure 8, the first recess G1, the second recess G2, and the third recess G3 are formed within a predetermined area on the first surface F1.

[0040] The first recess G1 is formed within a predetermined region (the region enclosed by the dashed line and the peripheral edge R1) extending from the peripheral edge R1 toward the negative side in the Y direction (towards the peripheral edge R2). The second recess G2 is formed within a predetermined region (the region enclosed by the dashed line and the peripheral edge R2) extending from the peripheral edge R2 toward the positive side in the Y direction (towards the peripheral edge R1). The third recess G3 is located between the first recess G1 and the second recess G2. Specifically, the third recess G3 is formed between the first recess G1 and the second recess G2 within a predetermined region (the region enclosed by the dashed line and the peripheral edge R3) extending from the peripheral edge R3 toward the positive side in the X direction (towards the support portion 22).

[0041] In this embodiment, the third recess G3 is formed such that its width (length in the Y direction) gradually narrows from the peripheral edge R3 side. The first recess G1 and the second recess G2 are formed in areas opposite each other, flanking the third recess G3. Each recess (G1, G2, G3) is provided such that the depression is formed by a gentle slope from the dashed line side toward the edge (R1, R2, R3). Therefore, the surface of the recesses (G1, G2, G3) is, for example, a curved surface. However, the recesses (G1, G2, G3) may include portions that form an angle.

[0042] When a user wants to release the lever from the fixed state shown in Figure 3, they can rotate the lever 20 by placing their finger on at least one of the first recess G1, the second recess G2, and the third recess G3.

[0043] Compared to the case where the gripping portion 21 is composed of a flat surface (for example, Patent Document 1), it is more difficult to grip with fingers and rotate the lever 20. In contrast, in this embodiment, the gripping portion 21 includes a first recess G1 and a second recess G2, making it easier to insert fingers from the side of the gripping portion 21 and to grip with fingers on the side of the gripping portion 21. Furthermore, in this embodiment, the gripping portion 21 also includes a third recess G3, making it easier to insert fingers from the bottom of the gripping portion 21 and to grip with fingers on the bottom of the gripping portion 21. As described above, in this embodiment, the lever 20 for switching between the fixed state and the released state of the leg portion 10 is easier for the user to operate.

[0044] Furthermore, in this embodiment, the width (length in the Y direction) of the third recess G3 gradually narrows from the peripheral edge R3 toward the support portion 22, and on the first surface F1, the first recess G1 and the second recess G2 are located on opposite sides of the third recess G3, which has the advantage of being able to provide the third recess G3 while ensuring the widths of the first recess G1 and the second recess G2. However, a configuration in which the width of the third recess G3 is constant toward the support portion 22 is also adopted.

[0045] In this embodiment, as illustrated in Figure 3, the second surface F2 of the gripping portion 21 is shaped such that the portion corresponding to the first recess G1, the portion corresponding to the second recess G2, and the portion corresponding to the third recess G3 protrude toward the opposite side from the middle section 12. Therefore, compared to a configuration in which the second surface F2 is flat, it is easier for the user to grip the gripping portion 21. However, a configuration in which the second surface F2 is flat is also adopted.

[0046] <Variation> The forms exemplified above can be modified in various ways. Specific examples of modifications are given below. It is also possible to combine two or more forms arbitrarily selected from the following examples.

[0047] (1) In the present invention, the specific structure of the leg portion 10 and the specific structures of the upper portion 11, middle portion 12, and lower portion 13 are not limited to the above examples, as long as it is possible to switch between the released state and the fixed state with the lever 20. For example, a configuration in which the upper portion 11, middle portion 12, and lower portion 13 each include a single axial member oriented along the X direction (for example, Japanese Patent Application Publication No. 2024-152047) can also be adopted. Furthermore, the specific structure for switching between the released state and the fixed state with the lever 20 can be appropriately changed depending on the structure adopted in the leg portion 10, but one example is as follows.

[0048] For example, the leg portion 10 comprises a first control unit that acts on the upper portion 11 in response to the rotation of the lever 20, and a second control unit that acts on the lower portion 13 in response to the rotation of the lever 20. For example, the first control unit includes one first rod, and the second control unit includes one second rod that extends from end E3 to end E4 in the middle portion 12 (for example, inside the cylindrical third member 121). The first rod and the second rod are connected to the support portion 22 of the lever 20. A first push block that presses the upper portion 11 when the lever is in the fixed state shown in Figure 3 is connected to the first rod, and a second push block that presses the lower portion 14 when the lever is in the fixed state shown in Figure 3 is connected to the second rod. When the lever 20 rotates from the fixed state shown in Figure 3 to the released state, the pressure on the upper portion 11 by the first push block is released, and the pressure on the lower portion 13 by the second push block is released. The positions of the first and second push pieces are not particularly limited.

[0049] However, in addition to the examples above, the specific structure for switching between the unlocked state and the locked state using the lever 20 may optionally be one of the following known technologies (e.g., U.S. Patent Application Publication No. 2008 / 111036, Chinese Utility Model Registration No. 218564910, etc.).

[0050] (2) The position where the lever 20 is provided can also be changed depending on the structure of the leg portion 10 and the specific structure for switching between the released state and the fixed state with the lever 20. Typically, it is on the end E3 side of the middle section 12, but other locations such as the end E4 of the middle section 12, the end E1 or end E2 of the upper section 11, or the end E4 of the lower section 13 may also be used.

[0051] (3) The aforementioned leg portion 10 and lever 20 (i.e., a pair of one leg portion 10 and one lever 20) can be conceived as a leg portion 10 mechanism. [Explanation of Symbols]

[0052] 1: Legs 10: Legs 11: Upper section 12: Middle section 13: Lower section 20: Lever 21: Grip part 22: Support part 30:Connection part 100: Holding device 111: First member 112: Second member 113: 1st connection part 121: Third member 122: Fourth member 123:Second connection part 124:Third connection part 131: Fifth member F1: 1st page F2: 2nd side G1: First recess G2: Second recess G3: Third recess R: Peripheral area

Claims

1. A device for holding an imaging device, It is extendable and comprises three legs, each including an upper section, a middle section, and a lower section, which extend in the direction of said extension. Each of the three legs is provided with three levers for switching between a released state in which the length of the leg can be extended or retracted, and a fixed state in which the length of the leg is fixed. In the released state, the middle section is movable relative to the upper section, and the lower section is movable relative to the middle section. In the aforementioned fixed state, the middle section is fixed to the upper section, and the lower section is fixed to the middle section. The lever includes a plate-shaped gripping portion that the user grasps, and a support portion to which the gripping portion is connected and which is rotatably connected to the leg portion around a central axis. Depending on the angle at which the user gripping the gripping part rotates the lever, it is possible to switch between the released state and the fixed state. The gripping portion includes an opposing surface that faces the leg portion when it is in the fixed state, The opposing surfaces include a first recess provided on one peripheral edge in a direction parallel to the central axis, and a second recess provided on the other peripheral edge in the same direction parallel to the central axis. holding device.

2. The third recess is provided on the peripheral edge of the opposing surface opposite to the support portion. The holding device according to claim 1.

3. The width of the third recess gradually narrows from the peripheral edge of the opposing surface opposite to the support portion toward the support portion. In the aforementioned opposing surfaces, the first recess and the second recess are located on opposite sides of the third recess. The holding device according to claim 2.

4. On the side of the gripping portion opposite to the opposing surface, the portions corresponding to the first recess and the second recess each protrude. The holding device according to claim 1.

5. It is extendable and has three legs, including an upper section, a middle section, and a lower section, which extend in the direction of extension. The leg portion is provided with a lever for switching between a released state in which the length of the leg portion can be extended or retracted, and a fixed state in which the length of the leg portion is fixed. In the released state, the middle section is movable relative to the upper section, and the lower section is movable relative to the middle section. In the aforementioned fixed state, the middle section is fixed to the upper section, and the lower section is fixed to the middle section. The lever includes a plate-shaped gripping portion that the user grasps, and a support portion to which the gripping portion is connected and which is rotatably connected to the leg portion around a central axis. Depending on the angle at which the user gripping the gripping part rotates the lever, it is possible to switch between the released state and the fixed state. The gripping portion includes an opposing surface that faces the leg portion when it is in the fixed state, The opposing surfaces include a first recess provided on one peripheral edge in a direction parallel to the central axis, and a second recess provided on the other peripheral edge in the same direction parallel to the central axis. Leg mechanism.

6. A lever for switching between a released state in which the length of the legs can be extended and retracted, and a fixed state in which the length of the legs is fixed, for three legs that are extendable and retractable, including an upper section, a middle section, and a lower section that extend in the direction of extension and retraction. In the released state, the middle section is movable relative to the upper section, and the lower section is movable relative to the middle section. In the aforementioned fixed state, the middle section is fixed to the upper section, and the lower section is fixed to the middle section. A plate-shaped gripping part that the user grasps, The gripping portion is connected to a support portion which is connected to the leg portion, The gripping portion includes, on one side, a first recess provided on the peripheral edge of one side in a direction parallel to the central axis, and a second recess provided on the peripheral edge of the other side in a direction parallel to the central axis. lever.

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