Office chair with waist pillow capable of being quickly disassembled and assembled

Abstract

The utility model provides an office chair with a waist pillow capable of being quickly disassembled and assembled, the office chair comprises a backrest bracket, a fixed seat, a switching piece and the waist pillow, the fixed seat is connected to the front side of the backrest bracket, and the fixed seat is provided with a first chute; the switching piece is movably mounted on the fixed seat, and the switching piece can move relative to the fixed seat so as to be switched between a locking position and an unlocking position; the waist pillow comprises a sliding part, and when the switching piece is located at the unlocking position, the sliding part can slide along the first sliding groove so as to enter and exit from the first sliding groove; when the sliding part is located in the first sliding groove and the switching piece is located at the locking position, the switching piece prevents the sliding part from sliding along the first sliding groove, and therefore the sliding part is prevented from being separated from the first sliding groove. The waist pillow of the office chair is high in disassembly convenience, and a user can conveniently clean or maintain the waist pillow.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to an office chair with a lumbar support that can be quickly disassembled and installed. Background Technology

[0002] Many chairs on the market are equipped with lumbar support pillows. As a key support component for maintaining the physiological curvature of the lumbar spine, the lumbar support pillow can support the user's lower back and improve the comfort of the chair. There are situations during chair use where it is necessary to remove the lumbar support pillow. For example, users need to remove the lumbar support pillow for cleaning or repair. However, currently, the removal and maintenance of lumbar support pillows on chairs is not very convenient, which causes great inconvenience to users when cleaning and repairing them. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes an office chair with a lumbar support that can be quickly disassembled, and the lumbar support is highly convenient to remove.

[0004] An office chair with a quickly detachable lumbar support according to an embodiment of the present invention includes: a backrest support; a fixed base connected to the front side of the backrest support, the fixed base having a first sliding groove; a switching member movably connected to the fixed base, the switching member being movable relative to the fixed base to switch between a locked position and an unlocked position; and a lumbar support including a sliding part, wherein when the switching member is in the unlocked position, the sliding part can slide along the first sliding groove to enter and exit the first sliding groove; and when the sliding part is located in the first sliding groove and the switching member is in the locked position, the switching member prevents the sliding part from sliding along the first sliding groove, thereby preventing the sliding part from separating from the first sliding groove.

[0005] An office chair with a quickly detachable lumbar support according to an embodiment of this utility model has at least the following advantages: When disassembling the lumbar support, the user only needs to drive the switching mechanism to the unlocked position, and then slide the lumbar support relative to the backrest bracket to remove it. Similarly, when installing the lumbar support, the user only needs to slide the lumbar support relative to the backrest bracket, allowing the sliding part to slide into the first sliding groove, and then drive the switching mechanism to the locked position to install the lumbar support onto the front side of the backrest bracket. The lumbar support and backrest are not connected by screws, eliminating the need for the user to tighten screws to disassemble or install the lumbar support. Therefore, the office chair with a quickly detachable lumbar support of this utility model offers high convenience in both disassembly and installation, thereby improving the ease of cleaning and maintaining the lumbar support for the user.

[0006] According to some embodiments of the present invention, the sliding part is provided with a second sliding groove, and the switching member includes a limiting part, which can slide along the second sliding groove; when the sliding part is located in the first sliding groove and the switching member is in the locked position, the limiting part is located in the second sliding groove, and the groove wall of the second sliding groove can abut against the limiting part to prevent the sliding part from sliding out of the first sliding groove.

[0007] According to some embodiments of the present invention, the switching component includes a connecting part, which is rotatably connected to the fixed base, and the second slide groove is arc-shaped; when the sliding part is located in the first slide groove and the switching component is in the locked position, the limiting part is located at the inner end of the second slide groove, the tangent of the groove wall at the inner end is a horizontal line, and the connecting part and the limiting part are located on the same vertical straight line.

[0008] According to some embodiments of the present invention, the sliding part is further provided with a third sliding groove, the outer end of the second sliding groove is connected to the third sliding groove, the extension direction of the third sliding groove is the same as the extension direction of the first sliding groove, when the switching member is in the unlocked position and the sliding part is located in the sliding groove, the limiting part is located in the third sliding groove and can slide along the third sliding groove.

[0009] According to some embodiments of the present invention, the first slide groove is provided with an opening that allows the sliding part to leave the first slide groove, and the opening is arranged facing upward.

[0010] According to some embodiments of the present invention, the switching member includes: an operating part, which is exposed on the fixed seat and outside the lumbar pillow; and a limiting part, which is located at both ends of the switching member respectively. When the sliding part is located in the first sliding groove and the switching member is in the locked position, the limiting part abuts against the sliding part to prevent the sliding part from sliding.

[0011] According to some embodiments of the present invention, the switching component further includes a connecting portion, which is rotatably connected to the fixed base and is located between the operating portion and the limiting portion.

[0012] According to some embodiments of the present invention, the surface of the fixing base is provided with a first pattern and a second pattern, the first pattern and the second pattern are different, and the first pattern and the second pattern are respectively located on both sides of the operating part.

[0013] According to some embodiments of the present invention, the operating part is located outside the first slide groove, and the operating part is located on the rear side of the first slide groove.

[0014] According to some embodiments of the present invention, the fixed base includes a first positioning part and a second positioning part, and the switching member is provided with a positioning groove. When the switching member is in the locked position, the first positioning part engages with the positioning groove to prevent the switching member from moving; when the switching member is in the unlocked position, the second positioning part engages with the positioning groove to prevent the switching member from moving.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of an office chair according to one embodiment of the present utility model;

[0018] Figure 2 This is a diagram of an office chair after the lumbar support has been removed.

[0019] Figure 3 This is a schematic diagram of the lumbar support, the mounting base, and the switching mechanism;

[0020] Figure 4 This is a schematic diagram of the lumbar support, fixing base, and switching mechanism from a top-down perspective.

[0021] Figure 5 A schematic diagram showing a portion of the sliding part of the lumbar pillow located within the first groove;

[0022] Figure 6 This is a schematic diagram illustrating the movement of the switching components and sliding parts during the disassembly of the lumbar pillow;

[0023] Figure 7 This is a schematic diagram of the first positioning part, the second positioning part, and the positioning groove.

[0024] Reference numerals: 101-Office chair, 102-Backrest support, 103-Lumbar pillow, 104-Armrest, 105-Seat frame, 106-Fixed seat, 107-Switching part, 108-Sliding part, 109-Second slide groove, 110-Third slide groove, 111-First slide groove, 112-First pattern, 113-Second pattern, 114-First screw, 115-Hinge, 116-Second screw, 117-Operating part, 118-Connecting part, 119-Limiting part, 120-Allowing groove, 121-Backrest, 122-Neck pillow, 123-Tangent, 124-Straight line, 125-First positioning part, 126-Second positioning part, 127-Positioning groove, 128-Elastic cantilever, 129-End protrusion. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Figure 1 An office chair 101 according to an embodiment of the present invention is shown. The office chair 101 includes a backrest support 102, a seat frame 105, armrests 104, and a lumbar support 103. The backrest support 102 is connected to the rear side of the seat frame 105. The lumbar support 103 is installed on the front side of the backrest support 102. A neck pillow 122 and a backrest 121 are also installed on the backrest support 102. The lumbar support 103 is located below the backrest 121 and above the seat frame 105. The upper part of the seat frame 105 is used to support flexible materials such as sponge or mesh fabric (not shown in the figures). Two armrests 104 are located on the left and right sides of the seat frame 105, respectively. The lumbar support 103 may include a frame and flexible material installed on the frame. The frame may be made of plastic and has high strength. The frame is used to support the flexible material. The flexible material may be sponge, mesh fabric, etc. The flexible material is located on the front side of the lumbar support 103 and is used to contact the user's waist.

[0030] Figure 2 The diagram shows the lumbar support 103 and the backrest support 102 when they are separated. Figure 2 As shown, the office chair 101 also includes a fixed base 106 and a switching element 107. The fixed base 106 is connected to the front side of the backrest 121, and the switching element 107 is movably connected to the fixed base 106. The switching element 107 can move relative to the fixed base 106, thereby switching between a locked position and an unlocked position. More specifically, in Figure 6 In (a), the switching element 107 is in the locked position; Figure 6 (b) and Figure 6 In (c), the switch 107 is in the unlocked position. For example... Figure 3 and Figure 4 As shown, the lumbar pillow 103 includes a sliding part 108, which may be part of the frame of the lumbar pillow 103 described above. The fixing base 106 is provided with a first sliding groove 111, which may be a dovetail groove or other groove suitable for the sliding part 108 to slide in. The sliding part 108 can slide in the first sliding groove 111 (e.g., ...). Figure 5 As shown), the four corners of the fixing part can be connected to the backrest bracket 102 by the first screw 114.

[0031] When the switch 107 is in the unlocked position, the sliding part 108 can slide along the first slide groove 111, thereby entering and exiting the first slide groove 111. When the sliding part 108 is located in the first slide groove 111 and the switch 107 is in the locked position, the switch 107 prevents the sliding part 108 from sliding along the first slide groove 111, thereby preventing the sliding part 108 from separating from the first slide groove 111.

[0032] The disassembly process of the lumbar pillow 103 is as follows: First, the user can put his hand into the gap between the lumbar pillow 103 and the backrest support 102 and manually drive the switching piece 107 to move and move the switching piece 107 to the unlock position; then, the user pulls or pushes the lumbar pillow 103 so that the sliding part 108 slides along the first slide groove 111 and leaves the first slide groove 111, thereby separating the lumbar pillow 103 from the backrest support 102.

[0033] The installation process of the lumbar pillow 103 is as follows: First, the user moves the switching piece 107 to the unlocked position; then, the user slides the sliding part 108 into the first slide groove 111; finally, the user moves the switching piece 107 to the locked position, so that the switching piece 107 fixes the position of the sliding part 108 in the slide groove, thereby fixing the lumbar pillow 103 and the backrest bracket 102 to each other.

[0034] When disassembling the lumbar pillow 103, the user only needs to drive the switching element 107 to move it to the unlocked position, and then slide the lumbar pillow 103 relative to the backrest bracket 102 to remove it. Similarly, when installing the lumbar pillow 103, the user only needs to slide the lumbar pillow 103 relative to the backrest bracket 102, allowing the sliding part 108 to slide into the first sliding groove 111, and then drive the switching element 107 to the locked position to install the lumbar pillow 103 onto the front side of the backrest bracket 102. The lumbar pillow 103 is not connected to the backrest 121 by screws, so the user does not need to tighten screws to disassemble or install the lumbar pillow 103. Therefore, the lumbar pillow 103 of the office chair 101 of this utility model is highly convenient to disassemble and install, thereby improving the convenience for users to clean and maintain the lumbar pillow 103.

[0035] In some embodiments, the switching element 107 is rotatably connected to the fixed base 106. Specifically, as... Figure 3 As shown, the switching component 107 includes a connecting portion 118 for rotatably connecting with the fixed base 106. The fixed base 106 includes a rotating shaft portion 115, which is cylindrical. The connecting portion 118 has a circular through hole and is sleeved on the outside of the rotating shaft portion 115, thereby allowing the switching component 107 to rotate around the rotating shaft portion 115. A second screw 116 is connected to a threaded hole (not shown) in the rotating shaft portion 115. The head of the second screw 116 is used to prevent the switching component 107 from separating from the rotating shaft portion 115, but the second screw 116 does not obstruct the rotation of the switching component 107.

[0036] like Figure 3 As shown, the switching member 107 also includes an operating part 117 and a limiting part 119. The operating part 117 protrudes outside the fixed base 106 and outside the lumbar pillow 103, so that the user can touch the operating part 117 to drive the switching member 107 to move. For example, the operating part 117 protrudes upward relative to the top of the fixed base 106, and the operating part 117 is located in the gap between the lumbar pillow 103 and the backrest 121. The limiting part 119 and the operating part 117 are respectively located at both ends of the switching member 107. When the sliding part 108 is located in the first slide groove 111 and the switching member 107 is in the locked position, the limiting part 119 abuts against the sliding part 108, thereby preventing the sliding part 108 from sliding, and thus fixing the lumbar pillow 103 relative to the backrest support 102. The connecting part 118 is located between the operating part 117 and the limiting part 119. In this way, when the user moves the operating part 117, the switching member 107 can be driven to move, and the way to drive the switching member 107 is relatively simple.

[0037] like Figure 3As shown, the surface of the fixing base 106 is provided with a first pattern 112 and a second pattern 113. The first pattern 112 and the second pattern 113 are different, and are located on both sides of the operating part 117. The first pattern 112 and the second pattern 113 can prompt the user to move the operating part 117 in one direction to release the fixation between the lumbar pillow 103 and the backrest support 102, and can prompt the user to move the operating part 117 in another direction to fix the lumbar pillow 103 and the backrest support 102 together. In this embodiment, the operating part 117 can rotate to the left and right. The first pattern 112 is located on the right side of the operating part 117, and the second pattern 113 is located on the left side of the operating part 117. The first pattern 112 is a pattern of an unlocked lock. The first pattern 112 can prompt the user to move the switching member 107 to the unlocked position by moving the operating part 117 to the right, thereby releasing the fixation between the lumbar pillow 103 and the backrest 121. The second pattern 113 is a lock pattern. The second pattern 113 can prompt the user to move the operating part 117 to the left to move the switching piece 107 to the locked position, thereby fixing the lumbar pillow 103 and the backrest 121. The first pattern 112 and the second pattern 113 can also be set to other patterns, as long as they are different and can prompt the user on how to unlock and lock.

[0038] like Figure 3 As shown, the sliding part 108 is provided with a second slide groove 109, and the limiting part 119 can slide along the second slide groove 109. When the sliding part 108 is located in the first slide groove 111 and the switching member 107 is in the locked position, the limiting part 119 is located in the second slide groove 109, and the groove wall of the second slide groove 109 abuts against the limiting part 119 to prevent the sliding part 108 from sliding. For example, the groove wall of the second slide groove 109 includes a lower side wall. If the sliding part 108 slides upward relative to the fixed base 106 and the switching member 107, then the lower side wall can abut against the bottom of the limiting part 119, and the limiting part 119 prevents the sliding part 108 from sliding upward, thereby preventing the sliding part 108 from sliding out of the first slide groove 111.

[0039] When the switching member 107 can rotate relative to the fixed base 106, the second slide groove 109 can be arc-shaped to match the movement trajectory of the limiting part 119. To reduce the sliding resistance of the limiting part 119 in the second slide groove 109, the limiting part 119 can be set as a cylindrical protrusion. Figure 6As shown, in some embodiments, when the sliding part 108 is located in the first slide groove 111 and the switching member 107 is in the locked position, the limiting part 119 is located at the inner end of the second slide groove 109, the tangent 123 of the groove wall at the inner end is a horizontal line, and the connecting part 118 and the limiting part 119 are located on the same vertical straight line 124. In this embodiment, the inner end is the end of the second slide groove 109 away from the third slide groove 110, and the inner end is the right end of the second slide groove 109. Since the tangent 123 of the lower side wall of the groove wall at the inner end is a horizontal line, if the sliding part 108 slides upward relative to the fixed base 106 and the switching member 107, then the force exerted by the groove wall of the second slide groove 109 on the limiting part 119 is upward and upward along the straight line 124. In this way, the force exerted by the groove wall of the second slide 109 on the limiting part 119 will not drive the switching member 107 to rotate, the switching member 107 will not easily move to the unlocked position, and the connection between the lumbar pillow 103 and the backrest bracket 102 will be more secure.

[0040] like Figure 7 As shown, in some embodiments, the fixing base 106 includes a first positioning part 125 and a second positioning part 126, and the switching member 107 is provided with a positioning groove 127. When the switching member 107 is in the locked position, the first positioning part 125 engages with the positioning groove 127, thereby hindering the movement of the switching member 107 and preventing accidental unlocking. When the switching member 107 is in the unlocked position, the second positioning part 126 engages with the positioning groove 127, thereby hindering the movement of the switching member 107 and preventing accidental locking of the lumbar pillow 103. More specifically, the second positioning part 126 may include an elastic cantilever 128 and an end protrusion 129 located at the end of the elastic cantilever 128. The shape of the first positioning part 125 is similar to that of the second positioning part 126, and will not be described in detail here. The positioning groove 127 may be disposed between the connecting part 118 and the limiting part 119. When the positioning groove 127 engages with the second positioning part 126, the positioning groove 127 actually engages with the end protrusion 129. Similarly, when the positioning groove 127 engages with the first positioning part 125, the positioning groove 127 engages with the end protrusion 129 of the first positioning part 125. This arrangement gives the second positioning part 126 good elasticity. When the user moves the switching element 107, the second positioning part 126 can undergo elastic deformation, allowing the end protrusion 129 to move in and out of the positioning groove 127, resulting in less resistance when the switching element 107 moves.

[0041] like Figure 3As shown, the sliding part 108 is also provided with a third sliding groove 110. The outer end of the second sliding groove 109 communicates with the third sliding groove 110, and the outer end and the inner end are the two ends of the second sliding groove 109, respectively. In this embodiment, the outer end of the second sliding groove 109 is the left end of the second sliding groove 109. The extending direction of the third sliding groove 110 is the same as the extending direction of the first sliding groove 111. When the switching member 107 is in the unlocked position and the sliding part 108 is still located in the sliding groove, the limiting part 119 is located in the third sliding groove 110 and can slide along the third sliding groove 110.

[0042] During the process of removing the lumbar pillow 103, such as Figure 6 (a) to Figure 6 As shown in (b), the user first moves the operating part 117, causing the switching member 107 to move from the locked position to the unlocked position. Correspondingly, the limiting part 119 slides from the inner end of the second slide groove 109 to the outer end of the second slide groove 109 and enters the third slide groove 110. Then, the user pulls the lumbar pillow 103 upwards, and accordingly, as shown in (b), the user moves the lumbar pillow 103 upwards. Figure 6 (b) to Figure 6 As shown in (c), the sliding part 108 moves upward relative to the fixed base 106 and the switching member 107, and the limiting part 119 slides along the third slide groove 110. When the sliding part 108 leaves the first slide groove 111, the limiting part 119 also leaves the third slide groove 110. The sliding engagement between the third slide groove 110 and the limiting part 119 can guide the sliding of the sliding part 108, thereby facilitating the user to remove the lumbar pillow 103.

[0043] The first slide groove 111 has an opening that allows the sliding part 108 to disengage, and the opening faces upward. This ensures that when the user removes the lumbar pillow 103, the seat frame 105 will not obstruct the user's removal of the lumbar pillow 103 as the user pulls it upward. Correspondingly, the third slide groove 110 has an opening that allows the limiting part 119 to disengage, and the opening of the third slide groove 110 faces downward.

[0044] like Figure 3 As shown, the operating part 117 can be located outside the first slide groove 111, and the operating part 117 is located behind the first slide groove 111. In this way, the operating part 117 will not obstruct the movement path of the sliding part 108, and will not affect the sliding part 108 entering and exiting the first slide groove 111. When the operating part 117 is located behind the first slide groove 111, in order to facilitate the cooperation between the limiting part 119 and the sliding part 108, the fixing base 106 can also be provided with a relief groove 120, which is penetrated by the limiting part 119 from back to front. The relief groove 120 at least partially overlaps with the second slide groove 109, and the shape of the relief groove 120 can also be set to an arc shape, so that the limiting part 119 can slide along the relief groove 120.

[0045] In the embodiments described above, the switching element 107 moves by rotation, and the switching element 107 is equivalent to a lever. In other embodiments not shown, the switching element 107 may also move linearly 124, and the switching element 107 may be configured as a button, push button, etc. Correspondingly, the second slide groove 109 may be configured as a straight and horizontal groove, for example, the second slide groove 109 extends in the left-right direction.

[0046] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An office chair with a quickly detachable lumbar support, characterized in that, include: Backrest support; A fixing seat is connected to the front side of the backrest bracket, and the fixing seat is provided with a first sliding groove; A switching element is movably connected to the fixed base, and the switching element is movable relative to the fixed base to switch between a locked position and an unlocked position; The lumbar pillow includes a sliding part. When the switching member is in the unlocked position, the sliding part can slide along the first slide groove, thereby moving in and out of the first slide groove. When the sliding part is located in the first groove and the switching member is in the locked position, the switching member prevents the sliding part from sliding along the first groove, thereby preventing the sliding part from separating from the first groove.

2. The office chair according to claim 1, characterized in that, The sliding part is provided with a second sliding groove, and the switching member includes a limiting part, which can slide along the second sliding groove; When the sliding part is located in the first slide groove and the switching member is in the locked position, the limiting part is located in the second slide groove, and the groove wall of the second slide groove can abut against the limiting part to prevent the sliding part from sliding out of the first slide groove.

3. The office chair according to claim 2, characterized in that, The switching component includes a connecting part, which is rotatably connected to the fixed base, and the second slide groove is arc-shaped; When the sliding part is located in the first groove and the switching member is in the locked position, the limiting part is located at the inner end of the second groove, the tangent of the groove wall at the inner end is a horizontal line, and the connecting part and the limiting part are located on the same vertical straight line.

4. The office chair according to claim 3, characterized in that, The sliding part is also provided with a third sliding groove, the outer end of the second sliding groove is connected to the third sliding groove, and the extension direction of the third sliding groove is the same as the extension direction of the first sliding groove. When the switching member is in the unlocked position and the sliding part is located in the sliding groove, the limiting part is located in the third sliding groove and can slide along the third sliding groove.

5. The office chair according to claim 1, characterized in that, The first groove has an opening that allows the sliding part to leave the first groove, and the opening is upward.

6. The office chair according to claim 1, characterized in that, The switching component includes: An operating part is exposed on the fixed base and outside the lumbar pillow; The limiting part and the operating part are respectively located at both ends of the switching member. When the sliding part is located in the first slide groove and the switching member is in the locked position, the limiting part abuts against the sliding part to prevent the sliding part from sliding.

7. The office chair according to claim 6, characterized in that, The switching component further includes a connecting part, which is rotatably connected to the fixed base and is located between the operating part and the limiting part.

8. The office chair according to claim 6, characterized in that, The surface of the fixing base is provided with a first pattern and a second pattern, which are different from each other. The first pattern and the second pattern are located on both sides of the operating part.

9. The office chair according to claim 6, characterized in that, The operating part is located outside the first slide groove, and the operating part is located on the rear side of the first slide groove.

10. The office chair according to any one of claims 1 to 9, characterized in that, The fixed base includes a first positioning part and a second positioning part. The switching member is provided with a positioning groove. When the switching member is in the locked position, the first positioning part engages with the positioning groove to prevent the switching member from moving. When the switching member is in the unlocked position, the second positioning part engages with the positioning groove to prevent the switching member from moving.

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