Umbrella fixing assembly and medical wheelchair

Abstract

The present invention belongs to the technical field of medical equipment and provides an umbrella fixing assembly and a medical wheelchair having the umbrella fixing assembly. The umbrella fixing assembly includes: a first fixing unit for detachably fixing the umbrella fixing assembly to the vertical pole of the wheelchair body, and includes: a first fixing seat, the bottom of which is provided with a sleeve that can be sleeved on the vertical pole; and a screw sleeve that is sleeved on the sleeve and threadedly connected to the sleeve; wherein the outer side of the sleeve is provided with a first conical surface A, and the inner side of the screw sleeve is provided with a first conical surface B that matches the first conical surface A, and by rotating the screw sleeve, the first conical surface B applies a force to the first conical surface A, thereby causing the sleeve to apply pressure to the vertical pole; and a second fixing unit, which is provided on the top of the first fixing unit and is used to fix the umbrella. The umbrella fixing assembly and medical wheelchair provided by the present invention have a simple structure and a reasonable design, and are convenient for fixing the umbrella to the wheelchair body.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an umbrella fixing assembly and a medical wheelchair. Background Art

[0002] like Figure 1 As shown, this is a medical wheelchair in the prior art. Due to its simple structure, economical and practical, and easy to fold and place, it has been widely used. For example, it is used as a shared wheelchair at the entrance of a hospital for patients with walking difficulties.

[0003] However, the above-mentioned medical wheelchair has the disadvantage that it cannot fix an umbrella. Therefore, on rainy days, medical staff need to push the wheelchair and cannot open the umbrella by themselves, which causes the medical staff to either get wet in the rain or need other medical staff to help hold the umbrella, which is extremely inconvenient to use. Summary of the Invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide an umbrella fixing assembly and a medical wheelchair to solve or alleviate the above-mentioned technical problems existing in the medical wheelchair in the prior art.

[0005] In order to achieve the above object, the present invention provides an umbrella fixing assembly, comprising:

[0006] The first fixing unit is used to detachably fix the umbrella fixing assembly to the upright pole of the wheelchair body, and includes:

[0007] A first fixing seat, the bottom of which is provided with a sleeve, and the sleeve can be sleeved on the vertical pole; and

[0008] A screw sleeve, which is sleeved on the sleeve and threadedly connected to the sleeve;

[0009] The outer side of the sleeve is provided with a first conical surface A, and the inner side of the screw sleeve is provided with a first conical surface B that matches the first conical surface A. By rotating the screw sleeve, the first conical surface B applies a force to the first conical surface A, so that the sleeve applies pressure to the vertical rod; and

[0010] The second fixing unit is arranged on the top of the first fixing unit and is used to fix the umbrella.

[0011] Furthermore, the first fixing unit further includes:

[0012] an inner rod, which is hollow and coaxially disposed in the sleeve, with a top end fixedly connected to the first fixing seat and capable of being coaxially inserted into the vertical rod; and

[0013] a slider, which is slidably disposed in the inner rod, is rotatably connected to the screw sleeve and can move along with the screw sleeve;

[0014] The inner wall of the inner rod is provided with a second conical surface A, and the outer wall of the slider is provided with a second conical surface B. By rotating the screw sleeve to drive the slider to move, the second conical surface B applies force to the second conical surface A, thereby causing the inner rod to apply force to the vertical rod.

[0015] Furthermore, the second fixing unit includes:

[0016] A second fixing seat, which is arranged on the top of the first fixing seat and has a receiving groove on the top; and

[0017] A fixing structure is arranged in the accommodating groove and is used to fix the umbrella. In the working state, the fixing structure is placed in the fixed state to fix the umbrella handle. In the non-working state, the fixing structure is placed in the non-working state to loosen the umbrella handle.

[0018] Furthermore, the fixing structure includes:

[0019] There are two fixing blocks, which are arranged opposite to each other in the receiving groove and are slidably connected to the second fixing seat; and

[0020] A forward and reverse screw is arranged in the accommodating groove, and its two ends are respectively rotatably connected to the two opposite side walls of the accommodating groove, and is threadedly connected to the two fixed blocks. In the working state, the forward and reverse screws are rotated to drive the two fixed blocks to approach each other, thereby clamping the umbrella handle. In the non-working state, the forward and reverse screws are rotated to drive the two fixed blocks to move away from each other, thereby loosening the umbrella handle.

[0021] Furthermore, the fixing structure also includes a knob, which is rotatably connected to the second fixing seat. The first end of the knob extends into the second fixing seat and is rotatably connected to the forward and reverse screws, and the second end extends outside the second fixing seat. The forward and reverse screws are rotated by rotating the knob.

[0022] Furthermore, it also includes a locking unit, the bottom of the second fixing seat is hinged to the top of the first fixing seat, and the top can rotate around its hinge center line, and the locking unit is arranged at the rotation center of the first fixing seat and the second fixing seat. In the working state, the locking unit is in a locked state so that the second fixing seat cannot rotate relative to the first fixing seat. In the non-working state, the locking unit is in an unlocked state so that the second fixing seat can rotate relative to the first fixing seat.

[0023] Furthermore, the locking unit includes a ratchet structure, and the ratchet structure includes:

[0024] A ratchet wheel, the outer peripheral wall of which is evenly provided with a plurality of ratchet teeth, and is fixedly connected to the first fixing seat;

[0025] a pawl, a first end of which is hinged to the second fixing seat and a second end of which can abut against the ratchet tooth; and

[0026] a torsion spring disposed at the hinge center of the pawl and having a tendency to move the second end of the pawl toward the ratchet teeth in a natural state;

[0027] In which, two ratchet structures are provided, and the preset rotation directions of the two ratchet structures are opposite. In the working state, the pawls of the two ratchet structures both conflict with the ratchet teeth, so that the top of the second fixed seat cannot rotate around its own hinge center line. In the non-working state, by separating the pawl of one of the two ratchet structures from the ratchet teeth, the top of the second fixed seat can rotate along the preset direction around its own hinge center line.

[0028] On the other hand, the present invention also provides a medical wheelchair, comprising a wheelchair body and an umbrella fixing assembly as described above, wherein the umbrella fixing assembly is arranged on the vertical pole of the wheelchair body.

[0029] Beneficial effects of the present invention:

[0030] The umbrella fixing assembly and medical wheelchair provided by the present invention fix the umbrella fixing assembly to the wheelchair limb through the first fixing unit, and fix the umbrella through the second fixing unit, thereby achieving the purpose of fixing the umbrella to the medical wheelchair. It has a simple structure, reasonable design, and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0032] Figure 1 This is a three-dimensional structural view of a medical wheelchair in the prior art;

[0033] Figure 2 A three-dimensional view of a medical wheelchair provided by one embodiment of the present invention;

[0034] Figure 3 for Figure 2 An enlarged view of section A is shown;

[0035] Figure 4 for Figure 3 A cross-sectional view in the direction BB shown;

[0036] Figure 5 for Figure 4 An enlarged view of section C is shown;

[0037] Figure 6 for Figure 4 The cross-sectional view in the DD direction is shown;

[0038] Figure 7 for Figure 4 A cross-sectional view in the EE direction is shown;

[0039] Figure 8 for Figure 4 A cross-sectional view in the FF direction is shown;

[0040] Figure 9 for Figure 8 An enlarged view of section G is shown.

[0041] Reference numerals:

[0042] 110. First fixing seat; 111. Sleeve; 112. Inner rod; 113. First conical surface A; 114. Second conical surface A; 120. Screw sleeve; 121. First conical surface B; 130. Slider; 131. Second conical surface B; 132. Collar; 133. Connecting portion; 210. Second fixing seat; 211. Receiving groove; 220. Fixing block; 221. Groove; 230. Forward and reverse screws; 240. Knob; 250. Driven gear; 260. Driving gear; 270. Intermediate gear; 310. Ratchet; 311. Ratchet teeth; 320. Pawl; 330. Operating handle; 410. Wheelchair body; 411. Vertical pole; 510. Umbrella handle. DETAILED DESCRIPTION

[0043] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0044] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0045] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0047] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0048] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0049] In one embodiment, Figure 2-9 As shown, the present invention provides an umbrella fixing assembly, comprising a first fixing unit and a second fixing unit.

[0050] The first fixing unit is used to detachably fix the umbrella fixing assembly to the vertical pole 411 of the wheelchair body 410 . The first fixing unit includes a first fixing seat 110 and a screw sleeve 120 .

[0051] A sleeve 111 is provided at the bottom of the first fixing seat 110 , and the sleeve 111 is sleeved on the vertical rod 411 . The screw sleeve 120 is sleeved on the sleeve 111 and is threadedly connected with the sleeve 111 .

[0052] The sleeve 111 has a first tapered surface A113 on its outer side, and the screw sleeve 120 has a first tapered surface B121 on its inner side that mates with the first tapered surface A113. By rotating the screw sleeve 120, the first tapered surface B121 applies a force to the first tapered surface A113, thereby causing the sleeve 111 to apply pressure to the upright rod 411.

[0053] Specifically, since the screw sleeve 120 is threadedly connected to the sleeve 111, when the screw sleeve 120 is rotated, the screw sleeve 120 will move along the axis of the sleeve 111. When the first conical surface B121 moves toward the direction close to the first conical surface A113, the first conical surface B121 squeezes the first conical surface A113 to apply force to the first conical surface A113, so that the sleeve 111 squeezes the vertical rod 411 to apply force to the vertical rod 411, thereby achieving the purpose of fixing the umbrella fixing assembly on the wheelchair body 410.

[0054] like Figure 4 、 5 As shown, the first fixing unit further includes an inner rod 112 and a slider 130 .

[0055] The inner rod 112 is hollow and coaxially arranged in the sleeve 111. The top end of the inner rod 112 is fixedly connected to the first fixing seat 110, and the inner rod 112 is coaxially inserted in the vertical rod 411. The slider 130 is slidably arranged in the inner rod 112, and the slider 130 is rotatably connected to the screw sleeve 120 and can move with the movement of the screw sleeve 120.

[0056] Specifically, the outer wall of the slider 130 is provided with a plurality of connecting portions 133, which are evenly arranged around the axis of the inner rod 112. The first end of the connecting portion 133 is fixedly connected to the slider 130, and the second end extends outside the sleeve 111 and is fixedly connected to the collar 132. The collar 132 is coaxially embedded in the inner side of the screw sleeve 120 and is rotatably connected to the screw sleeve 120. When in use, the screw sleeve 120 is rotated, and the screw sleeve 120 moves along the axis of the sleeve 111, thereby moving the slider 130 with the collar 132 and the connecting portion 133, thereby achieving the purpose of driving the slider 130 to move.

[0057] Among them, the inner wall of the inner rod 112 is provided with a second conical surface A114, and the outer wall of the slider 130 is provided with a second conical surface B131. By rotating the screw sleeve 120 to drive the slider 130 to move, the second conical surface B131 applies force to the second conical surface A114, so that the inner rod 112 applies force to the vertical rod 411.

[0058] Specifically, the screw sleeve 120 is rotated to drive the slider 130 to move. When the second tapered surface B131 moves toward the second tapered surface A114, the second tapered surface B131 squeezes the second tapered surface A114 to apply force to the second tapered surface A114, thereby causing the inner rod 112 to squeeze the vertical rod 411 to apply force to the vertical rod 411, thereby achieving the purpose of improving the stability of the fixation.

[0059] In this embodiment, the vertical rod 411 is squeezed from both the inside and outside of the vertical rod 411, thereby improving the stability of the umbrella fixing assembly fixed to the wheelchair body 410. At the same time, squeezing the vertical rod 411 from both the inside and outside of the vertical rod 411 can prevent the vertical rod 411 from deformation, thereby achieving the purpose of improving the service life.

[0060] The second fixing unit is arranged on the top of the first fixing unit, and the second fixing unit is used to fix the umbrella.

[0061] Specifically, the second fixing unit includes a second fixing seat 210 and a fixing structure.

[0062] A second fixing base 210 is mounted on top of the first fixing base 110. A receiving slot 211 is defined in the top of the second fixing base 210. A fixing structure is disposed within receiving slot 211 and is used to secure an umbrella. Specifically, in the operating state, the umbrella handle is inserted into receiving slot 211, and the fixing structure is placed in a fixed state to secure the handle, thereby securing the umbrella. In the non-operating state, the fixing structure is placed in a non-fixed state to release the handle, allowing the umbrella to be removed.

[0063] like Figure 4 、 6 As shown, specifically, the fixing structure includes a fixing block 220 and a forward and reverse screw 230 .

[0064] Two fixing blocks 220 are provided. The two fixing blocks 220 are disposed opposite each other within the receiving groove 211 and are slidably connected to the second fixing base 210. A forward and reverse screw 230 is disposed within the receiving groove 211. The two ends of the forward and reverse screw 230 are rotatably connected to the two opposing side walls of the receiving groove 211, and the forward and reverse screw 230 is threadedly connected to the two fixing blocks 220. In the operating state, the forward and reverse screw 230 is rotated to drive the two fixing blocks 220 toward each other, thereby clamping the umbrella handle. In the non-operating state, the forward and reverse screw 230 is rotated to drive the two fixing blocks 220 away from each other, thereby loosening the umbrella handle.

[0065] Specifically, the forward / reversible screw 230 has two externally threaded segments with the same pitch but opposite spiral directions. The forward / reversible screw 230 is threadedly connected to the two fixed blocks 220 via the two externally threaded segments. When the forward / reversible screw 230 is rotated in the forward direction, the two fixed blocks 220 move closer to each other, and when the forward / reversible screw 230 is rotated in the reverse direction, the two fixed blocks 220 move away from each other.

[0066] Preferably, mutually fitting grooves 221 are provided on opposite sides of the two fixing blocks 220 to improve the fixing effect on the umbrella handle.

[0067] Preferably, if Figure 6 As shown, the fixing structure further includes a knob 240, which is disposed outside the second fixing base 210 and is rotatably connected to the second fixing base 210. The knob 240 is rotatably connected to the forward and reverse screw 230, and the forward and reverse screw 230 is rotated by rotating the knob 240. Specifically, the knob 240 is coaxially sleeved on the power input shaft of the driving gear 260, and the forward and reverse screw 230 is coaxially sleeved with the driven gear 250, and the driving gear 260 is meshed with the driven gear 250.

[0068] Specifically, if Figure 6 As shown, there are two forward and reverse screws 230. The driving gear 260 can be directly engaged with the driven gear 250 or engaged with the driven paper wheel 250 through the intermediate gear 270 to achieve the purpose of reducing the gear radius.

[0069] In one embodiment, a locking unit is further included. The bottom of the second fixing base 210 is hinged to the top of the first fixing base 110, and the top can rotate about its hinge centerline. The locking unit is located at the rotation center of the first fixing base 110 and the second fixing base 210. In the working state, the locking unit is in a locked state, so that the second fixing base 210 cannot rotate relative to the first fixing base 110. In the non-working state, the locking unit is in an unlocked state, so that the second fixing base 210 can rotate relative to the first fixing base 110.

[0070] When in use, the locking unit is placed in the unlocked state, so that the second fixing seat 210 can be rotated relative to the first fixing seat 110 to achieve the purpose of adjusting the angle of the umbrella; when the umbrella is adjusted to a suitable angle, the locking unit is placed in the locked state to achieve the purpose of fixing the umbrella at the above angle.

[0071] In this embodiment, the bottom of the second fixing base 210 is hinged to the top of the first fixing base 110, and a locking assembly is provided at the hinge center, so that the umbrella can be adjusted to a suitable angle and maintained at that angle.

[0072] like Figure 8-9 As shown, specifically, the locking unit includes a ratchet structure.

[0073] The ratchet structure includes a ratchet wheel 310, a pawl 320, and a torsion spring. The outer peripheral wall of the ratchet wheel 310 is evenly distributed with multiple ratchet teeth 311. The ratchet wheel 310 is fixedly connected to the first fixed seat 110. The first end of the pawl 320 is hinged to the second fixed seat 210, and the second end can contact the ratchet teeth 311. The torsion spring is disposed at the hinge center of the pawl 320. The two ends of the torsion spring respectively contact the pawl 320 and the second fixed seat 210. In its natural state, the torsion spring has a tendency to move the second end of the pawl 320 toward the ratchet teeth 311.

[0074] There are two ratchet structures, and the preset rotation directions of the two ratchet structures are opposite, that is, the preset direction of one ratchet structure is clockwise, that is, the ratchet structure only allows the top of the second fixed seat 210 to rotate in the positive direction around its own hinge center line, and the preset direction of the other ratchet structure is counterclockwise, that is, the ratchet structure only allows the top of the second fixed seat 210 to rotate in the clockwise direction around its own hinge center line.

[0075] In the working state, the pawls 320 of the two ratchet structures both conflict with the ratchet teeth 311. Since the preset rotation directions of the two ratchet structures are opposite, when the pawls 320 of the two ratchet structures both conflict with the ratchet teeth 311, the top of the second fixed seat 210 cannot rotate around its own hinge center line.

[0076] In the non-operating state, the pawl 320 of one of the two ratchet structures is separated from the ratchet teeth 311, allowing the top of the second fixed seat 210 to rotate in a predetermined direction about its own hinge centerline. Specifically, when the pawl 320 of ratchet structure A is separated from the ratchet teeth 311, ratchet structure A loses its function, and under the action of ratchet structure B, the top of the second fixed seat 210 can only rotate clockwise about its own hinge centerline. Similarly, when the pawl 320 of ratchet structure B is separated from the ratchet teeth 311, ratchet structure B loses its function, and under the action of ratchet structure A, the top of the second fixed seat 210 can only rotate counterclockwise about its own hinge centerline. Of course, when the pawl 320 of both ratchet structures are separated from the ratchet teeth 311, the top of the second fixed seat 210 can rotate either counterclockwise or clockwise about its own hinge centerline.

[0077] like Figure 8-9 As shown, preferably, the locking unit further includes an operating handle 330, a first end of the operating handle 330 being hinged to the pawl 320 and a second end extending outside the second fixing seat 210. When in use, a force is applied to the pawl 320 by the operating handle 330 to separate the pawl 320 from the ratchet teeth 311.

[0078] like Figure 2 As shown, in one embodiment, the present invention also provides a medical wheelchair, including a wheelchair body 410 and an umbrella fixing assembly of any of the above embodiments, wherein the umbrella fixing assembly is arranged on the vertical pole 411 of the wheelchair body 410.

[0079] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An umbrella fixing assembly, characterized in that: include: A first fixing unit, used for detachably fixing the umbrella fixing assembly to the upright pole (411) of the wheelchair body (410), comprises: A first fixing seat (110) is provided with a sleeve (111) at the bottom thereof, and the sleeve (111) can be sleeved on the vertical pole (411); and a screw sleeve (120), which is sleeved on the sleeve (111) and threadedly connected to the sleeve (111); The outer side of the sleeve (111) is provided with a first conical surface A (113), and the inner side of the screw sleeve (120) is provided with a first conical surface B (121) that matches the first conical surface A (113). By rotating the screw sleeve (120), the first conical surface B (121) applies a force to the first conical surface A (113), thereby causing the sleeve (111) to apply pressure to the vertical rod (411); and a second fixing unit, which is arranged on the top of the first fixing unit and is used to fix the umbrella; The first fixing unit further includes: an inner rod (112) which is hollow and coaxially disposed in the sleeve (111), with its top end fixedly connected to the first fixing seat (110) and capable of being coaxially inserted in the vertical rod (411); and A slider (130) is slidably disposed within the inner rod (112), is rotatably connected to the screw sleeve (120), and can move along with the screw sleeve (120); The inner side wall of the inner rod (112) is provided with a second conical surface A (114), and the outer side wall of the slider (130) is provided with a second conical surface B (131). By rotating the screw sleeve (120), the slider (130) is driven to move, so that the second conical surface B (131) applies a force to the second conical surface A (114), thereby causing the inner rod (112) to apply a force to the vertical rod (411).

2. The umbrella fixing assembly according to claim 1, characterized in that: The second fixing unit includes: a second fixing seat (210), which is arranged on the top of the first fixing seat (110), and a receiving groove (211) is provided on the top of the second fixing seat; and A fixing structure is provided in the accommodating groove (211) and is used to fix an umbrella. In a working state, the fixing structure is placed in a fixed state to fix the umbrella handle. In a non-working state, the fixing structure is placed in a non-working state to loosen the umbrella handle.

3. The umbrella fixing assembly according to claim 2, characterized in that: The fixed structure includes: Two fixing blocks (220) are provided, and the two fixing blocks (220) are relatively arranged in the receiving groove (211) and are slidably connected to the second fixing seat (210); and The forward and reverse screw rods (230) are arranged in the accommodating groove (211), and the two ends thereof are respectively rotatably connected to the two opposite side walls of the accommodating groove (211), and are threadedly connected to the two fixing blocks (220). In a working state, the forward and reverse screw rods (230) are rotated to drive the two fixing blocks (220) to approach each other, thereby clamping the umbrella handle. In a non-working state, the forward and reverse screw rods (230) are rotated to drive the two fixing blocks (220) to move away from each other, thereby loosening the umbrella handle.

4. The umbrella fixing assembly according to claim 3, characterized in that: The fixing structure further includes a knob (240), wherein the knob (240) is rotatably connected to the second fixing seat (210), a first end of the knob (240) extends into the second fixing seat (210) and is rotatably connected to the forward and reverse screw rods (230), and a second end extends outside the second fixing seat (210), and the forward and reverse screw rods (230) are rotated by rotating the knob (240).

5. The umbrella fixing assembly according to claim 3 or 4, characterized in that: The second fixing seat (210) further comprises a locking unit, wherein the bottom of the second fixing seat (210) is hinged to the top of the first fixing seat (110), and the top can rotate around its hinge center line. The locking unit is arranged at the rotation center of the first fixing seat (110) and the second fixing seat (210). In the working state, the locking unit is in a locked state so that the second fixing seat (210) cannot rotate relative to the first fixing seat (110). In the non-working state, the locking unit is in an unlocked state so that the second fixing seat (210) can rotate relative to the first fixing seat (110).

6. The umbrella fixing assembly according to claim 5, characterized in that: The locking unit includes a ratchet structure, and the ratchet structure includes: A ratchet (310), the outer peripheral wall of which is evenly provided with a plurality of ratchet teeth (311), which is fixedly connected to the first fixing seat (110); a ratchet (320), a first end of which is hinged to the second fixing seat (210) and a second end of which can abut against the ratchet (311); and a torsion spring, which is arranged at the hinge center of the pawl (320) and has a tendency to move the second end of the pawl (320) toward the ratchet (311) in a natural state; Wherein, two ratchet structures are provided, and the preset rotation directions of the two ratchet structures are opposite. In a working state, the pawls (320) of the two ratchet structures both conflict with the ratchet teeth (311), so that the top of the second fixed seat (210) cannot rotate around its own hinge center line. In a non-working state, by separating the pawl (320) of one of the two ratchet structures from the ratchet teeth (311), the top of the second fixed seat (210) can rotate around its own hinge center line in a preset direction.

7. A medical wheelchair, comprising a wheelchair body (410), characterized in that: It also includes the umbrella fixing assembly according to any one of claims 1 to 6, wherein the umbrella fixing assembly is arranged on the vertical pole (411) of the wheelchair body (410).

Images