Special safety belt device for electric wheelchair

Abstract

The utility model discloses a special safety belt device for an electric wheelchair, which belongs to the field of wheelchair safety protection and comprises a waistband arranged on the front side of a wheelchair backrest and a chest protector, the chest protector is connected with the wheelchair backrest through four straps, the two straps on one side are fixedly connected with the wheelchair backrest, and the two straps on the other side are fixedly connected with the wheelchair backrest. The two straps on the other side are movably connected with the wheelchair backrest; the protection mechanism comprises a shell, a sliding groove is formed in the shell, balls are arranged in the sliding groove in a rolling mode, the sliding groove extends to the opposite side wall from one side of the bottom of the shell, a sliding pin is arranged at the tail end of one side of the side wall of the sliding groove in a penetrating and sliding mode, and a pressure sensor is arranged on the side, located in the sliding groove, of the sliding pin. A safety device is arranged on the side, away from the sliding groove, of the sliding pin and connected with a fixing device, an air bag is arranged in the fixing device, and an air pump connected with the air bag is arranged in the shell. According to the utility model, the air bag in the shell is used for protecting a wheelchair rider when the wheelchair topples over.

Description

Technical Field

[0001] This utility model belongs to the field of wheelchair safety protection, specifically relating to a special safety belt device for electric wheelchairs. Background Technology

[0002] Wheelchairs are an important means of transportation for people with mobility impairments, and their use is diverse and complex. Users may move around indoors in environments such as homes and hospitals, or outdoors in places such as sidewalks and parks. Many safety hazards exist in these different scenarios. For example, when an electric wheelchair travels on uneven surfaces, such as speed bumps or potholes, the wheelchair may bump and sway, and the user can easily lose balance and slip off the wheelchair, resulting in injury. This is especially true for users with limited limb control, such as those with high-level paraplegia or Alzheimer's disease, who find it difficult to maintain a stable posture in the wheelchair using their own strength.

[0003] Current wheelchair safety belts only secure the occupant to the wheelchair; they cannot provide effective protection when the wheelchair tipes over while going uphill or downhill. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a special safety belt device for electric wheelchairs.

[0005] The technical solution adopted to solve the above-mentioned technical problem is: a special safety belt device for electric wheelchairs, including a waist belt installed on the front side of the wheelchair backrest, and further including:

[0006] The chest protector is connected to the back of the wheelchair via four straps. Two straps on one side are fixedly connected to the back of the wheelchair, while the other two straps on the other side are movably connected to the back of the wheelchair.

[0007] A protective mechanism is provided at the center of the chest protector and on the back of the wheelchair. The protective mechanism includes a housing with a groove inside. A ball bearing rolls within the groove. The groove extends from one side of the bottom of the housing to the opposite side wall. A sliding pin is slidably provided at one end of the side wall of the groove. A pressure sensor is provided on the side of the sliding pin inside the groove. A safety device is provided on the side of the sliding pin away from the groove. The safety device is connected to a fixing device. An airbag is provided inside the fixing device. An air pump connected to the airbag is provided inside the housing. The air pump is electrically connected to the pressure sensor.

[0008] The above technical solution secures the wheelchair user with a waist belt and chest protector, and provides protection for the user when the wheelchair tilts forward or backward.

[0009] Further, as a preferred embodiment of the utility model, the waistband is provided with a buckle and a clamping groove, the buckle is movably connected with the clamping groove.

[0010] Through the above technical scheme, the waistband is more convenient for the wheelchair occupant to operate.

[0011] Further, as a preferred embodiment of the utility model, the safety device comprises:

[0012] The connecting plate is connected with the sliding pin;

[0013] The fixed block is arranged on the side wall of the shell, and the fixed block is connected with the connecting plate through a spring;

[0014] The connecting piece is arranged on both sides of the bottom of the connecting plate;

[0015] The connecting ring is arranged on the connecting piece.

[0016] Through the above technical scheme, the safety device can use the ball to trigger.

[0017] Further, as a preferred embodiment of the utility model, the fixing device comprises:

[0018] The pull plate is movably connected with the bottom end of the connecting ring;

[0019] The fixed box is arranged on the other end of the pull plate, and the pull plate penetrates into the fixed box;

[0020] The binding belt is arranged on the air bag, and the two ends of the binding belt are located in the fixed box and movably connected with the pull plate.

[0021] Through the above technical scheme, the fixing device fixes the position of the air bag.

[0022] Further, as a preferred embodiment of the utility model, the back strap is provided with an adjusting box;

[0023] The adjusting box is rotatably provided with a knob, and the adjusting box is rotatably provided with a rotating shaft, the knob is connected with the rotating shaft, and the back strap penetrates the adjusting box and the rotating shaft.

[0024] Through the above technical scheme, the back strap can be adjusted.

[0025] Further, as a preferred embodiment of the utility model, the air pump stores compressed nitrogen.

[0026] The utility model discloses a beneficial effect as follows: waistband and the chest protection are fixed to the wheelchair rider, when the wheelchair is tilted forward or backward, the ball triggers the safety device, and the safety device releases the fixing device from the fixing of the air bag, and the pressure sensor signal is transmitted to the air pump, and the air pump inflates the air bag, and the air bag pops out to provide protection for the wheelchair rider, which has the advantages of protecting the wheelchair rider when the wheelchair is tilted forward or backward. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a kind of special safety belt device's three-dimensional structure schematic diagram of electric wheelchair of the utility model;

[0028] Figure 2 It is the three-dimensional structure schematic diagram inside the protection mechanism of special safety belt device of electric wheelchair of the utility model;

[0029] Figure 3 It is the three-dimensional sectional schematic diagram inside the protection mechanism of special safety belt device of electric wheelchair of the utility model;

[0030] Figure 4 It is the three-dimensional structure schematic diagram of A of special safety belt device of electric wheelchair of the utility model;

[0031] Figure 5 It is the three-dimensional structure schematic diagram of fixed box of special safety belt device of electric wheelchair of the utility model;

[0032] Figure 6 It is the three-dimensional structure schematic diagram of adjusting box of special safety belt device of electric wheelchair of the utility model.

[0033] Reference signs: 1, chest protection;11, adjusting box;12, knob;13, back strap;14, pivot;2, waistband;21, buckle;22, card slot;3, shell;31, air bag;32, air pump;33, bandage;34, connecting plate;35, connecting piece;36, connecting ring;37, pull plate;38, sliding slot;39, sliding pin;310, spring;311, fixed block;312, ball;313, pressure sensor;320, fixed box. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the drawing and example, and the utility model is further explained in detail.It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model.

[0035] As Figures 1-6 The utility model discloses a kind of special safety belt devices of electric wheelchair, including setting in the waistband 2 of wheelchair backrest positive side, still include:

[0036] The chest protector 1 is connected with the wheelchair backrest through four straps 13, one side of which is fixedly connected with the wheelchair backrest, and the other side of which is movably connected with the wheelchair backrest;

[0037] The protection mechanism is arranged at the center of the chest protector 1 and the back of the wheelchair backrest, and comprises a shell 3, a sliding groove 38 is arranged in the shell 3, a ball 312 is arranged in the sliding groove 38 and rolls, the sliding groove 38 extends from one side of the bottom of the shell 3 to the opposite side wall, a sliding pin 39 is arranged at the end of one side of the side wall of the sliding groove 38 and penetrates the sliding groove 38, a pressure sensor 313 is arranged at one side of the sliding pin 39 inside the sliding groove 38, an insurance device is arranged at the side of the sliding pin 39 away from the sliding groove 38, the insurance device is connected with a fixing device, an air bag 31 is arranged in the fixing device, a gas pump 32 connected with the air bag 31 is arranged in the shell 3, and the gas pump 32 is electrically connected with the pressure sensor 313.

[0038] Specifically, the protection mechanism arranged on the chest protector 1 is arranged in the direction that the side provided with the insurance device is away from the chest protector 1, and the protection mechanism arranged on the back of the wheelchair backrest is arranged in the direction that the side provided with the insurance device is away from the wheelchair backrest.

[0039] Further, during the forward tilting of the wheelchair, the ball 312 in the protection mechanism arranged on the chest protector 1 slides in the sliding groove 38 under the action of gravity and hits the sliding pin 39, at the same time, the pressure sensor 313 is triggered, the pressure sensor 313 transmits a signal to the gas pump 32, the gas pump 32 inflates the air bag 31, at the same time, the sliding pin 39 drives the insurance device, the insurance device releases the fixing of the air bag 31 by the fixing device, and then the air bag 31 is ejected, and the protection mechanism arranged on the back of the wheelchair backrest is not affected by the forward tilting.

[0040] During the backward tilting, the working principle of the protection mechanism arranged on the back of the wheelchair backrest is the same as that of the protection mechanism arranged on the chest protector 1.

[0041] Further, the two straps 13 on one side of the chest protector 1 are movably connected with the wheelchair backrest, so that the protection mechanism is not accidentally triggered during the wearing and taking off of the chest protector 1.

[0042] As a specific embodiment of the utility model, the waistband 2 is provided with a buckle 21 and a clamping groove 22, and the buckle 21 is movably connected with the clamping groove 22.

[0043] As a specific embodiment of the utility model, the insurance device comprises:

[0044] A connecting plate 34 is connected with the sliding pin 39.

[0045] The fixed block 311 is arranged on the side wall of the shell 3, and the fixed block 311 is connected with the connecting plate 34 through the spring 310;

[0046] The connecting piece 35 is arranged on the bottom of the connecting plate 34.

[0047] The connecting ring 36 is arranged on the connecting piece 35.

[0048] As a specific embodiment of the utility model, the fixing device comprises:

[0049] The pull plate 37 is connected with the bottom end of the connecting ring 36.

[0050] The fixed box 320 is arranged on the other end of the pull plate 37, and the pull plate 37 penetrates into the inside of the fixed box 320.

[0051] The binding belt 33 is arranged on the air bag 31, and the two ends of the binding belt 33 are located in the fixed box 320 and are movably connected with the pull plate 37.

[0052] Specifically, the sliding pin 39 drives the connecting plate 34, the spring 310 is compressed, the connecting piece 35 drives the connecting ring 36 to pull the pull plate 37, the pull plate 37 is movably loosened from the binding belt 33, at this time, the air bag 31 is in a pop-out state, and the air pump 32 inflates the air bag 31.

[0053] As a specific embodiment of the utility model, the back strap 13 is provided with the adjusting box 11.

[0054] The adjusting box 11 is rotatably provided with the knob 12, the inside of the adjusting box 11 is rotatably provided with the rotating shaft 14, the knob 12 is connected with the rotating shaft 14, and the back strap 13 penetrates the adjusting box 11 and the rotating shaft 14.

[0055] Specifically, rotating the knob 12 makes the back strap 13 in the adjusting box 11 wind on the rotating shaft 14, and the length of the back strap 13 is adjusted.

[0056] As a specific embodiment of the utility model, the air pump 32 stores compressed nitrogen.

[0057] Specifically, nitrogen is non-toxic and has low manufacturing cost, and is suitable for being used as a protection gas in the air bag 31.

[0058] The above is only a preferred embodiment of the utility model, and is not used to limit the protection scope of the utility model.

Claims

1. A special safety belt device for electrically powered wheelchair, comprising a waist belt (2) arranged on the right side of the backrest of the wheelchair, characterized in that, Also include: The chest (1) is connected with the wheelchair backrest by four straps (13), and two straps (13) on one side are fixedly connected with the wheelchair backrest, and the other two straps (13) are movably connected with the wheelchair backrest; The protection mechanism is arranged at the center of the chest (1) and the back of the wheelchair backrest, and the protection mechanism comprises a shell (3), a sliding groove (38) is arranged in the shell (3), a ball (312) is arranged in the sliding groove (38), the sliding groove (38) extends from one side of the bottom of the shell (3) to the opposite side wall, a sliding pin (39) is arranged at the end of one side of the side wall of the sliding groove (38), a pressure sensor (313) is arranged at one side of the sliding pin (39) in the sliding groove (38), an insurance device is arranged at the side of the sliding pin (39) away from the sliding groove (38), the insurance device is connected with a fixing device, an air bag (31) is arranged in the fixing device, a gas pump (32) connected with the air bag (31) is arranged in the shell (3), and the gas pump (32) and the pressure sensor (313) are electrically connected.

2. A special safety belt device for electrically powered wheelchair according to claim 1, characterized in that, The waistband (2) is provided with a buckle (21) and a clamping groove (22), and the buckle (21) is movably connected with the clamping groove (22).

3. The special safety belt device for electrically powered wheelchair according to claim 1, wherein The insurance device comprises: A connecting plate (34) connected with the sliding pin (39); A fixed block (311) arranged on the side wall of the shell (3), and the fixed block (311) is connected with the connecting plate (34) through a spring (310); Two connecting pieces (35) are arranged on the bottom of the connecting plate (34) on both sides respectively; A connecting ring (36) is arranged on the connecting piece (35).

4. A special safety belt device for electrically powered wheelchair according to claim 3, characterized in that, The fixing device comprises: A pull plate (37) having one end connected with the bottom end of the connecting ring (36); A fixed box (320) arranged at the other end of the pull plate (37), and the pull plate (37) penetrates into the inside of the fixed box (320); A binding belt (33) arranged on the air bag (31), and the two ends of the binding belt (33) are located in the fixed box (320), and the two ends of the binding belt (33) are movably connected with the pull plate (37).

5. The special safety belt apparatus for electric-powered wheelchair according to claim 1, wherein The strap (13) is provided with an adjusting box (11); A knob (12) is rotatably arranged on the adjusting box (11), a rotating shaft (14) is rotatably arranged in the adjusting box (11), the knob (12) is connected with the rotating shaft (14), and the strap (13) penetrates the adjusting box (11) and the rotating shaft (14).

6. The special safety belt apparatus for electric-powered wheelchair according to claim 1, wherein The gas pump (32) stores compressed nitrogen.

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