Positioning mechanism of nursing wheelchair

Abstract

The utility model discloses a positioning mechanism of a nursing wheelchair, and relates to the technical field of positioning. The chair comprises a seat cushion, the top of the seat cushion is fixedly connected with a backrest, wheels are arranged at the bottom of the seat cushion, and a positioning device is arranged at the top of the seat cushion; the positioning device comprises a motor, the top of the motor is fixedly connected to the bottom of the cushion, an output shaft of the motor is fixedly connected with a two-way threaded rod, and the circumferential surface of the two-way threaded rod is in threaded connection with a threaded sleeve; according to the utility model, the rotation of the output shaft of the motor is matched with the two-way threaded rod, the threaded sleeve, the push rod, the hydraulic rod and other components in the positioning device, so that the hydraulic rod can move outwards due to the force of the stress rod moving into the hydraulic cylinder when the stress rod moves into the hydraulic cylinder; the hydraulic rods moving outwards are used for blocking the bearings in the wheels, so that the wheels are positioned, and the wheels are prevented from moving.

Description

Technical Field

[0001] The utility model belongs to the field of positioning, in particular to a positioning mechanism of a nursing wheelchair. Background Art

[0002] A wheelchair is a chair equipped with wheels that can assist with walking. It is an important means of mobility for the injured, sick, and disabled for home rehabilitation, transportation, medical treatment, and activities. Wheelchairs not only meet the mobility needs of the physically disabled and those with limited mobility, but more importantly, they facilitate family members' mobility and care, allowing patients to exercise and participate in social activities.

[0003] According to a locking mechanism for a medical care wheelchair disclosed (publication number: CN201384640Y), it includes an axis cylinder and a footrest frame provided at the front end of the chair frame. The axis cylinder and the footrest frame are rotatably matched. A clamping hole and a guide hole are respectively opened at the same relative position of the axis cylinder and the footrest frame. A locking pin is inserted into the two holes. A return spring connected to the locking pin is provided in the guide hole of the footrest frame. A handle is installed at the outer end of the locking pin. The surface shape of the handle matches the surface shape of the junction between the footrest frame and the handle. The design of this solution is novel and reasonable, making locking and unlocking very labor-saving.

[0004] The above application uses the axis tube and footrest at the front end of the chair frame, which form a rotating assembly, making it impossible to massage the user's back, resulting in the user being unable to relax his back when sitting for a long time. Therefore, we proposed a positioning mechanism for a nursing wheelchair that can massage the user's back. Utility Model Content

[0005] The purpose of the utility model is to provide a positioning mechanism for a nursing wheelchair, which cooperates with the first rotating shaft, the first massage roller, the second rotating shaft, the second massage roller, the third rotating shaft, the third massage roller and other components inside the massage device through the rotation of the output shaft of the motor, so that when the first belt rotates, the first rotating shaft will be driven to rotate, and when the first rotating shaft rotates, the first massage roller will be driven to rotate, so that the three rotating shafts are driven to rotate the massage rollers by the belt, so that the back of the user is massaged, thereby solving the existing problems.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model is a positioning mechanism for a nursing wheelchair, comprising a seat cushion, a backrest fixedly connected to the top of the seat cushion, wheels provided at the bottom of the seat cushion, and a positioning device provided at the top of the seat cushion;

[0008] The positioning device includes a motor, the top of the motor is fixedly connected to the bottom of the seat cushion, the output shaft of the motor is fixedly connected to a bidirectional threaded rod, the circumferential surface of the bidirectional threaded rod is threadedly connected to a threaded sleeve, the circumferential surface of the threaded sleeve is fixedly connected to a push rod, the side of the motor is fixedly connected to a limiting rod, the circumferential surface of the limiting rod passes through the side of the threaded sleeve, and the circumferential surface of the limiting rod is slidably connected to the inner wall of the threaded sleeve.

[0009] Furthermore, a hydraulic cylinder is fixedly connected to the bottom of the seat cushion, one end of the hydraulic cylinder is slidably connected to a force rod through a piston, and the other end of the hydraulic cylinder is slidably connected to a hydraulic rod through another piston. The function of the hydraulic rod is to prevent the wheels from moving.

[0010] Furthermore, a spring is fixedly connected to the circumferential surface of the stressed rod, and one end of the spring away from the stressed rod is fixedly connected to the side of the hydraulic cylinder. The function of the spring is to allow the stressed rod to be reset by the spring when the pushing rod no longer pushes the stressed rod.

[0011] Furthermore, the number of the threaded sleeve, the push rod, the hydraulic cylinder, the force-bearing rod, the hydraulic rod and the spring is set to two and they are symmetrical with each other along the vertical center axis of the seat cushion. The side of the force-bearing rod is located on the displacement trajectory of the push rod. The number of the threaded sleeve, the push rod, the hydraulic cylinder, the force-bearing rod, the hydraulic rod and the spring is set to two and they are symmetrical with each other along the vertical center axis of the seat cushion so that the wheels on both sides can be blocked at the same time to better position them.

[0012] Furthermore, a massage device is provided on the front side of the backrest, and the massage device includes a first placement groove, which is opened on the front side of the backrest, and the first placement groove is rotatably connected to the inside of the first placement groove, and a first massage roller is fixedly connected to the circumferential surface of the first rotation shaft. A second placement groove is opened on the front side of the backrest, and the second placement groove is rotatably connected to the inside of the second rotation shaft, and a second massage roller is fixedly connected to the circumferential surface of the second rotation shaft. A third placement groove is opened on the front side of the backrest, and the third placement groove is rotatably connected to the inside of the third rotation shaft, and a third massage roller is fixedly connected to the circumferential surface of the third rotation shaft. The function of the first massage roller, the second massage roller and the third massage roller is to massage the patient's back.

[0013] Furthermore, the circumferential surface of the bidirectional threaded rod is transmission connected to a first belt, one end of the first belt is transmission connected to the circumferential surface of the first rotating shaft, the circumferential surface of the first rotating shaft is transmission connected to a second belt, one end of the second belt is transmission connected to the circumferential surface of the second rotating shaft, the circumferential surface of the second rotating shaft is transmission connected to a third belt, one end of the third belt is transmission connected to the circumferential surface of the third rotating shaft, and the function of the first belt, the second belt and the third belt is to drive the rotating shaft to rotate so as to drive the massage roller to massage the patient's back.

[0014] Furthermore, the top of the first massage roller is located below the second massage roller, the top of the second massage roller is located below the third massage roller, the top of the first massage roller is located below the second massage roller, and the top of the second massage roller is located below the third massage roller, so that the entire back can be massaged.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model realizes that the push rod pushes the force-bearing rod when it is separated to both sides through the rotation of the motor output shaft and the two-way threaded rod, threaded sleeve, push rod, limit rod, hydraulic cylinder, force rod, hydraulic rod and other components inside the positioning device, and the force-bearing rod moves into the hydraulic cylinder when the push rod pushes the force-bearing rod. When the force-bearing rod moves into the hydraulic cylinder, the hydraulic rod moves outward due to the force of the force-bearing rod moving into the hydraulic cylinder, so that the bearing in the wheel is blocked by the outward-moving hydraulic rod, so that the wheel is positioned and the wheel is prevented from moving.

[0017] 2. The utility model realizes that when the first belt rotates, the first rotating shaft is driven to rotate, and when the first rotating shaft rotates, the first massage roller is driven to rotate. The three rotating shafts are driven to rotate the massage rollers by the belt, so that the back of the user is massaged.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1This is a schematic diagram of the three-dimensional appearance structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the three-dimensional overall structure of the positioning device of the present utility model;

[0022] Figure 3 This is a schematic diagram of the three-dimensional overall structure of the massage device of the present utility model;

[0023] Figure 4 For the utility model Figure 2 Schematic diagram of the three-dimensional enlarged structure at point A in the middle.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 1. Seat cushion; 2. Backrest; 3. Wheels; 4. Positioning device; 41. Motor; 42. Bidirectional threaded rod; 43. Threaded sleeve; 44. Push rod; 45. Limit rod; 46. Hydraulic cylinder; 47. Force rod; 48. Hydraulic rod; 49. Spring; 5. Massage device; 51. First placement slot; 52. First rotating shaft; 53. First massage roller; 54. Second placement slot; 55. Second rotating shaft; 56. Second massage roller; 57. Third placement slot; 58. Third rotating shaft; 59. Third massage roller; 510. First belt; 511. Second belt; 512. Third belt. DETAILED DESCRIPTION

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

[0027] See also Figure 1-4 The utility model is a positioning mechanism for a nursing wheelchair, comprising a seat cushion 1, a backrest 2 fixedly connected to the top of the seat cushion 1, wheels 3 provided at the bottom of the seat cushion 1, and a positioning device 4 provided at the top of the seat cushion 1;

[0028] The positioning device 4 includes a motor 41, the top of the motor 41 is fixedly connected to the bottom of the seat cushion 1, the output shaft of the motor 41 is fixedly connected to a bidirectional threaded rod 42, the circumferential surface of the bidirectional threaded rod 42 is threadedly connected to a threaded sleeve 43, the circumferential surface of the threaded sleeve 43 is fixedly connected to a push rod 44, the side of the motor 41 is fixedly connected to a limiting rod 45, the circumferential surface of the limiting rod 45 passes through the side of the threaded sleeve 43, and the circumferential surface of the limiting rod 45 is slidably connected to the inner wall of the threaded sleeve 43.

[0029] A hydraulic cylinder 46 is fixedly connected to the bottom of the seat cushion 1. A force-bearing rod 47 is slidably connected to one end of the hydraulic cylinder 46 through a piston, and a hydraulic rod 48 is slidably connected to the other end of the hydraulic cylinder 46 through another piston. The function of the hydraulic rod 48 is to prevent the wheel 3 from moving.

[0030] A spring 49 is fixedly connected to the circumferential surface of the force-bearing rod 47, and one end of the spring 49 away from the force-bearing rod 47 is fixedly connected to the side of the hydraulic cylinder 46. The function of the spring 49 is to allow the force-bearing rod 47 to be reset by the spring 49 when the push rod 44 no longer pushes the force-bearing rod 47.

[0031] The number of the threaded sleeve 43, the pushing rod 44, the hydraulic cylinder 46, the force rod 47, the hydraulic rod 48 and the spring 49 is set to two and they are symmetrical with each other along the vertical center axis of the seat cushion 1. The side of the force rod 47 is located on the displacement trajectory of the pushing rod 44. The number of the threaded sleeve 43, the pushing rod 44, the hydraulic cylinder 46, the force rod 47, the hydraulic rod 48 and the spring 49 is set to two and they are symmetrical with each other along the vertical center axis of the seat cushion 1. The purpose is to simultaneously block the wheels 3 on both sides to better position them.

[0032] A massage device 5 is provided on the front side of the backrest 2, and the massage device 5 includes a first placement groove 51, which is opened on the front side of the backrest 2, and the first placement groove 51 is internally connected to a first rotating shaft 52, and a first massage roller 53 is fixedly connected to the circumferential surface of the first rotating shaft 52. A second placement groove 54 is opened on the front side of the backrest 2, and the second placement groove 54 is internally connected to a second rotating shaft 55, and a second massage roller 56 is fixedly connected to the circumferential surface of the second rotating shaft 55. A third placement groove 57 is opened on the front side of the backrest 2, and the third placement groove 57 is internally connected to a third rotating shaft 58, and a third massage roller 59 is fixedly connected to the circumferential surface of the third rotating shaft 58. The function of the first massage roller 53, the second massage roller 56 and the third massage roller 59 is to massage the patient's back.

[0033] The circumferential surface of the bidirectional threaded rod 42 is connected to the first belt 510, one end of the first belt 510 is connected to the circumferential surface of the first rotating shaft 52, the circumferential surface of the first rotating shaft 52 is connected to the second belt 511, one end of the second belt 511 is connected to the circumferential surface of the second rotating shaft 55, the circumferential surface of the second rotating shaft 55 is connected to the third belt 512, one end of the third belt 512 is connected to the circumferential surface of the third rotating shaft 58. The function of the first belt 510, the second belt 511 and the third belt 512 is to drive the rotating shaft to rotate, thereby driving the massage roller to massage the patient's back.

[0034] The top of the first massage roller 53 is located below the second massage roller 56, and the top of the second massage roller 56 is located below the third massage roller 59. The top of the first massage roller 53 is located below the second massage roller 56, and the top of the second massage roller 56 is located below the third massage roller 59. The purpose of this is to massage the entire back.

[0035] A specific application of this embodiment is as follows: first, when the user needs to position the device during use, the positioning device 4 can be used. By starting the motor 41, when the output shaft of the motor 41 rotates, the bidirectional threaded rod 42 is driven to rotate. When the bidirectional threaded rod 42 rotates, the two sides of the two threaded sleeves 43 are driven to separate. When the two sides of the two threaded sleeves 43 are separated, the two pushing rods 44 are driven to separate. When the pushing rods 44 separate to the sides, they push the force-bearing rod 47. When the pushing rod 44 pushes the force-bearing rod 47, the force-bearing rod 47 moves into the hydraulic cylinder 46. When the force-bearing rod 47 moves into the hydraulic cylinder 46, the hydraulic rod 48 moves outward due to the force of the force-bearing rod 47 moving into the hydraulic cylinder 46. The outward-moving hydraulic rod 48 is inserted into the wheel 3 to block the bearing from rotating, thereby positioning the device.

[0036] The rotation of the bidirectional threaded rod 42 can drive the massage device 5. When the user uses the device, the massage device 5 can be started to massage the back. When the bidirectional threaded rod 42 rotates, it will drive the first belt 510 to rotate. When the first belt 510 rotates, it will drive the first rotating shaft 52 to rotate. When the first rotating shaft 52 rotates, it will drive the first massage roller 53 to rotate. At the same time, when the first rotating shaft 52 rotates, it will also drive the second belt 511 to rotate. When the second belt 511 rotates, it will drive the second rotating shaft 55 to rotate. When the second rotating shaft 55 rotates, it will drive the second massage roller 56 to rotate. At the same time, when the second rotating shaft 55 rotates, it will also drive the third belt 512 to rotate. When the third belt 512 rotates, it will drive the third rotating shaft 58 to rotate. When the third rotating shaft 58 rotates, it will drive the third massage roller 59 to rotate, so that the rotation of the three massage rollers can be used to massage and relax the user's back.

[0037] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0038] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning mechanism for a nursing wheelchair, comprising a seat cushion (1), characterized in that: The top of the seat cushion (1) is fixedly connected to a backrest (2), the bottom of the seat cushion (1) is provided with wheels (3), and the top of the seat cushion (1) is provided with a positioning device (4); The positioning device (4) comprises a motor (41), the top of the motor (41) is fixedly connected to the bottom of the seat cushion (1), the output shaft of the motor (41) is fixedly connected to a bidirectional threaded rod (42), the circumferential surface of the bidirectional threaded rod (42) is threadedly connected to a threaded sleeve (43), the circumferential surface of the threaded sleeve (43) is fixedly connected to a push rod (44), the side of the motor (41) is fixedly connected to a limiting rod (45), the circumferential surface of the limiting rod (45) passes through the side of the threaded sleeve (43), and the circumferential surface of the limiting rod (45) is slidably connected to the inner wall of the threaded sleeve (43).

2. The positioning mechanism of a nursing wheelchair according to claim 1, characterized in that: The bottom of the seat cushion (1) is fixedly connected to a hydraulic cylinder (46), one end of the hydraulic cylinder (46) is internally connected to a force-bearing rod (47) via a piston sliding connection, and the other end of the hydraulic cylinder (46) is internally connected to a hydraulic rod (48) via another piston sliding connection.

3. The positioning mechanism of a nursing wheelchair according to claim 2, characterized in that: The circumferential surface of the force-bearing rod (47) is fixedly connected to a spring (49), and one end of the spring (49) away from the force-bearing rod (47) is fixedly connected to the side of the hydraulic cylinder (46).

4. The positioning mechanism of a nursing wheelchair according to claim 1, characterized in that: The number of the threaded sleeve (43), the pushing rod (44), the hydraulic cylinder (46), the force rod (47), the hydraulic rod (48) and the spring (49) is set to two and they are symmetrical to each other along the vertical center axis of the seat cushion (1), and the side surface of the force rod (47) is located on the displacement track of the pushing rod (44).

5. The positioning mechanism of a nursing wheelchair according to claim 1, characterized in that: The front side of the backrest (2) is provided with a massage device (5), and the massage device (5) includes a first placement groove (51), the first placement groove (51) is opened on the front side of the backrest (2), the first placement groove (51) is internally connected to a first rotating shaft (52), and a first massage roller (53) is fixedly connected to the circumferential surface of the first rotating shaft (52), a second placement groove (54) is opened on the front side of the backrest (2), the second placement groove (54) is internally connected to a second rotating shaft (55), and a second massage roller (56) is fixedly connected to the circumferential surface of the second rotating shaft (55), a third placement groove (57) is opened on the front side of the backrest (2), the third placement groove (57) is internally connected to a third rotating shaft (58), and a third massage roller (59) is fixedly connected to the circumferential surface of the third rotating shaft (58).

6. The positioning mechanism of a nursing wheelchair according to claim 1, characterized in that: The circumferential surface of the bidirectional threaded rod (42) is transmission-connected to a first belt (510), one end of the first belt (510) is transmission-connected to the circumferential surface of a first rotating shaft (52), the circumferential surface of the first rotating shaft (52) is transmission-connected to a second belt (511), one end of the second belt (511) is transmission-connected to the circumferential surface of a second rotating shaft (55), the circumferential surface of the second rotating shaft (55) is transmission-connected to a third belt (512), one end of the third belt (512) is transmission-connected to the circumferential surface of a third rotating shaft (58).

7. The positioning mechanism of a nursing wheelchair according to claim 5, characterized in that: The top of the first massage roller (53) is located below the second massage roller (56), and the top of the second massage roller (56) is located below the third massage roller (59).

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