A massage chair limb pressure testing device

Abstract

The utility model provides a massage chair limb pressure test device, comprising a limb model and a plurality of strain gauge pressure sensors; the surface of the limb model is provided with a plurality of shallow holes, and each strain gauge pressure sensor is installed in one of the shallow holes; the interior of the limb model is provided with a threading groove along the length direction, and the bottom of the shallow hole is provided with a lead hole connected to the threading groove; the strain gauge pressure sensor comprises a strain body with a strain gauge attached thereto, the top of the strain body is connected to an umbrella-shaped pressure cover, and the wire of the strain gauge passes through the lead hole and the threading groove in turn from one end of the limb model. The pressure of the massage movement is transmitted to the arch bridge-shaped strain body through the umbrella-shaped pressure cover, and the pressure can be measured at multiple angles and the pressure measurement structure is simplified, thereby achieving the purpose of improving the pressure measurement accuracy and overall thinning; in addition, when the pressure continues to increase uncontrolled, the limb model made of soft plastic material is more easily destroyed, thereby protecting the massage chair and the strain gauge pressure sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a limb pressure testing device for a massage chair. Background Art

[0002] The production of massage chair products needs to meet the requirements of GB / T 26182-2022 "Health Massage Chairs for Household and Similar Purposes". In order to avoid mechanical injuries, the standard stipulates that the structure of the massage chair should not entangle or pull human hair. Moving parts such as motors and transmission belts that may cause harm to the human body should be protected by outer covers or other means to avoid contact, ensuring that they can provide sufficient protection to prevent personal injury during normal use. Massage chairs should have anti-pinch measures, and the maximum clamping force should not be greater than N. Once a person is accidentally clamped, the clamping part should be able to automatically start the anti-pinch action before the maximum clamping force is reached to avoid injury.

[0003] At present, most massage chair tests use human models, and various sensors for testing are installed on the human models. However, during the pressure test, the curved massage movement keeps moving, and ordinary pressure sensors have large measurement errors for pressure that cannot be applied directly. In addition, the thickness of the palm model does not exceed 25mm, and it is difficult to find a test device on the market that can meet both multi-directional and accurate pressure measurement and thickness requirements. Utility Model Content

[0004] In view of the defects of the background technology, the utility model proposes a limb pressure testing device for a massage chair, which transmits the pressure of the arc-shaped massage movement to the arch-shaped strain body through an umbrella-shaped pressure cover. It can measure pressure at multiple angles and simplify the pressure measuring structure, thereby achieving the purpose of improving pressure measurement accuracy and overall thinning.

[0005] The utility model proposes a massage chair limb pressure test device, comprising a limb model and a plurality of strain gauge pressure sensors;

[0006] A number of shallow holes are opened on the surface of the limb model, and each strain gauge pressure sensor is installed in one of the shallow holes;

[0007] A threading groove is provided inside the limb model along the length direction, and a lead hole connected to the threading groove is provided at the bottom of the shallow hole;

[0008] The strain gauge pressure sensor comprises a strain body with a strain gauge attached thereto, the top of the strain body is connected to an umbrella-shaped pressure cover, and the wires of the strain gauge pass through a lead hole and a threading groove in sequence and go out from one end of the limb model.

[0009] Preferably, the strain gauge pressure sensor further comprises a bottom box, and the strain body is installed in an inner cavity formed by the pressure-bearing cover and the bottom box;

[0010] The strain body is in the shape of an arch bridge, the middle bridge top of the strain body is fixedly connected to the pressure cover, the approach bridges at both ends of the strain body are fixedly connected to the bottom box, and a strain gauge is attached to each of the bridge decks on both sides of the strain body;

[0011] A gap is left between the bottom peripheral edge of the pressure cover and the top peripheral edge of the bottom box.

[0012] Preferably, a step is provided in the shallow hole, the bottom box is sleeved and fixed in the shallow hole, and a gap is left between the bottom peripheral edge of the pressure cover and the hole wall of the shallow hole.

[0013] Preferably, the cover top of the pressure cover protrudes from the shallow hole.

[0014] Preferably, a sleeve hole is provided on the middle bridge top of the strain body, and the pressure cover extends downward along the central axis and the umbrella handle is inserted into the sleeve hole for fixing;

[0015] Preferably, the strain gauge is a metal sheet, and a thickened collar is provided on the bridge top of the strain gauge;

[0016] A base is integrally provided on the peripheral side of the umbrella handle, the base is mounted on the top of the thickened sleeve ring, and the bottom surface of the base and the top surface of the thickened sleeve ring are connected through an upward convex arc surface.

[0017] Preferably, a pair of horizontally extending mounting grooves are symmetrically formed on the top peripheral edge of the bottom box, and a guide groove is formed on one side of the mounting groove along the peripheral edge direction;

[0018] The guide groove extends obliquely, one side of which is communicated with the mounting groove, and the other side of which is provided with an opening on the top surface of the top peripheral edge.

[0019] Preferably, the bottom box is provided with a set of wiring seats, and the set of wiring seats is longitudinally arranged in the middle of the bottom plate of the bottom box;

[0020] Preferably, a detachable rubber protective cover is provided at the bottom of the bottom box on the periphery of a group of wiring sockets, and the rubber protective cover has a downwardly convex arc surface, and a through hole for threading is opened in the middle of the arc surface.

[0021] Preferably, the limb model is one of plaster, polyethylene terephthalate or thermoplastic polyurethane.

[0022] The beneficial effects of the utility model include: the pressure of the arc-surface massage movement is transmitted to the arch-bridge-shaped strain body through the pressure-bearing cover of the umbrella-shaped structure, the pressure can be measured at multiple angles and the pressure measuring structure is simplified, thereby achieving the purpose of improving the pressure measuring accuracy and overall thinning; in addition, when the pressure continues to increase uncontrollably, the limb model made of soft plastic material is more easily destroyed, thereby protecting the massage chair and the strain gauge pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is described in detail below with reference to the embodiments and drawings, wherein:

[0024] Figure 1 The utility model is a cross-sectional schematic diagram of a limb pressure testing device (forearm and palm) of a massage chair.

[0025] Figure 2 The utility model is a schematic diagram of the assembly of a limb pressure testing device (forearm and palm) for a massage chair.

[0026] Figure 3 It is an assembly schematic diagram of the strain gauge pressure sensor of the utility model.

[0027] Figure 4 It is a structural explosion diagram of the strain gauge pressure sensor of the utility model from the front side perspective.

[0028] Figure 5 It is a structural explosion diagram of the strain gauge pressure sensor of the utility model from the rear side perspective.

[0029] Figure 6 The utility model is a schematic diagram of the assembly of a limb pressure testing device (calf) for a massage chair.

[0030] Reference numerals:

[0031] 110-shallow hole, 120-wire groove, 130-lead hole, 140-limb model forearm, 150-limb model palm, 160-limb model calf, 200-strain gauge pressure sensor, 1-strain gauge, 2-strain body, 21-bridge top, 22-approach bridge, 23-bridge deck, 24-hole, 25-thickened ring, 3-pressure cover, 31-umbrella handle, 32-base, 4-bottom box, 41-installation groove, 42-guide groove, 43-wire holder, 44-rubber protective cover, 45-through hole. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the utility model, rather than implying that each embodiment of the utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0034] The principle of the present utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0035] Reference Figure 1-6 The utility model proposes a massage chair limb pressure test device, including a limb model and a plurality of strain gauge pressure sensors 200; a plurality of shallow holes 110 are provided on the surface of the limb model, and each strain gauge pressure sensor 200 is installed in one of the shallow holes 110; a threading groove 120 is provided inside the limb model along the length direction, and a lead hole 130 connected to the threading groove 120 is provided at the bottom of the shallow hole 110; the strain gauge pressure sensor 200 includes a strain body 2 with a strain gauge 1 attached thereto, the top of the strain body 2 is connected to an umbrella-shaped pressure cover 3, and the wire of the strain gauge 1 passes through the lead hole 130 and the threading groove 120 in turn and passes out from one end of the limb model. The pressure of the arc-surface massage movement is transmitted to the arch-bridge-shaped strain body 2 through the umbrella-shaped pressure cover 3, and the pressure can be measured at multiple angles and the pressure measurement structure is simplified, thereby achieving the purpose of improving the pressure measurement accuracy and overall thinning.

[0036] The limb model is made of a material that is easy to shape and has low hardness, such as gypsum, or polyethylene terephthalate (PET) or thermoplastic polyurethane (TPU) through a 3D printer. This type of material is simple to shape and easy to further process. After the limb model is made of the above materials through a mold or a 3D printer and the threading groove 120 is processed at the same time, a shallow hole 110 and a lead hole 130 are manually opened on the model with an electric drill according to different massage chair models, and then the strain gauge pressure sensor 200 is installed, making the massage chair limb pressure test device easier to customize. The limb model is mainly forearms (including palms) and calves. Since the hardness of the above materials themselves is not high, when the massage chair fails and the pressure is too high, the limb model is more easily destroyed, thereby protecting the massage chair and the strain gauge pressure sensor 200.

[0037] In this embodiment, the strain gauge pressure sensor 200 as a whole includes a bottom box 4 in addition to the strain body 2, the strain gauge 1 and the pressure cover 3. The strain body 2 is installed in the inner cavity formed by the pressure cover 3 and the bottom box 4. The strain body 2 is in the shape of an arch bridge. The middle bridge top 21 of the strain body 2 is fixedly connected to the pressure cover 3, the approach bridges 22 at both ends of the strain body 2 are fixedly connected to the bottom box 4, and a strain gauge 1 is attached to each of the bridge decks 23 on both sides of the strain body 2. When the pressure cover 3 is rolled and squeezed by the movement of the massage chair, the pressure cover 3 with an arc surface on the top can receive pressure from all directions and transmit the pressure to the strain body 2. The strain body 2 and the strain gauge 1 can be stretched or deformed along the bridge body direction according to the pressure direction, thereby generating a pressure signal. There is a gap between the bottom surrounding edge of the pressure cover 3 and the top surrounding edge of the bottom box 4, so that the pressure cover 3 can be freely deflected in all directions.

[0038] In this embodiment, a step is provided in the shallow hole 110, and the bottom box 4 is sleeved and fixed in the shallow hole 110. A gap is left between the bottom edge of the pressure cover 3 and the hole wall of the shallow hole 110 to leave space for the deflection of the pressure cover 3.

[0039] The forearm and calf of the human body are irregular shapes similar to cylinders. After the hole position is selected, the bottom plane of the shallow hole 110 should be made parallel to the section of the arc surface where the hole position is located as much as possible, so that the edge of the pressure cover 3 is flush with the hole wall on the surrounding side. At the same time, the top of the pressure cover 3 should protrude from the shallow hole 110 to better feel the pressure.

[0040] In this embodiment, the middle bridge top 21 of the strain body 2 is provided with a sleeve hole 24, and the pressure cover 3 extends downward along the central axis and the umbrella handle 31 is inserted into the sleeve hole 24 for fixing; the strain gauge 1 is a metal sheet, and the bridge top 21 of the strain gauge 1 is provided with a thickened collar 25; the surrounding side of the umbrella handle 31 is integrally provided with a base 32, the base 32 is mounted on the top of the thickened collar 25, and the bottom surface of the base 32 and the top surface of the thickened collar 25 are connected through an upward convex arc surface. A pair of horizontally extending mounting grooves 41 are symmetrically provided on the top peripheral edge of the bottom box 4, and a guide groove 42 is provided on one side of the mounting groove 41 along the peripheral direction, and the guide groove 42 extends obliquely, one side is connected to the mounting groove 41, and the other side is provided with an opening on the top surface of the top peripheral edge.

[0041] The thickness of the strain gauge pressure sensor 200 is between 15mm and 20mm, and the diameter is within 40mm. Setting the strain gauge 1 on the inclined bridge deck 23 can reduce the area of ​​the strain gauge pressure sensor 200. When deformed, the strain gauges 1 on the bridge decks 23 on both sides respectively form pressure signals. The pressure direction can be analyzed through the two sets of pressure signals and the corresponding pressure values ​​can be screened out from the database.

[0042] In order to overcome the difficulty of inconvenient assembly of small-volume sensors, the strain body 2 with the strain gauge 1 mounted thereon can be rotated to insert the bridges 22 at both ends of the strain body 2 into the mounting grooves 41, and then the handle 31 of the pressure cover 3 is inserted into the thickened collar 25 and the sleeve hole 24 in the middle of the strain body 2. The thickened collar 25 can increase the contact surface between the handle 31 and the strain body 2 to better transmit pressure and fix the handle 31.

[0043] In this embodiment, the bottom box 4 is provided with a group of wiring seats 43, which are longitudinally arranged in the middle of the bottom plate of the bottom box 4. The strain gauge 1 is connected to the port of the wiring seat 43 located on the inner side of the bottom box 4 through a wire, and the wire connected to the port of the wiring seat 43 located on the outside of the bottom box 4 is inserted into the threading groove 120. The bottom of the bottom box 4 is provided with a detachable rubber protective cover 44 on the periphery of the wiring seat 43. The rubber protective cover 44 has a downward convex arc surface, and a through hole 45 for threading is opened in the middle of the arc surface. After the strain gauge pressure sensor 200 is installed in the shallow hole 110, the through hole 45 is opposite to the lead hole 130, and the signal line passing through the through hole 45 enters the threading groove 120 through the lead hole 130. The rubber protective cover 44 can prevent gypsum powder from entering the wiring seat 43, and can also play a buffering role between the strain gauge pressure sensor 200 and the limb model when the pressure is applied.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A massage chair limb pressure testing device, characterized in that: Includes a limb model and several strain gauge pressure sensors; A plurality of shallow holes are opened on the surface of the limb model, and each strain gauge pressure sensor is installed in one of the shallow holes; A threading groove is provided inside the limb model along the length direction, and a lead hole connected to the threading groove is provided at the bottom of the shallow hole; The strain gauge pressure sensor comprises a strain body with a strain gauge attached thereto, the top of the strain body is connected to an umbrella-shaped pressure-bearing cover, and the wire of the strain gauge passes through the lead hole and the threading groove in sequence and comes out from one end of the limb model.

2. The massage chair limb pressure testing device according to claim 1, characterized in that: The strain gauge pressure sensor further comprises a bottom box, and the strain body is installed in an inner cavity formed by the pressure-bearing cover and the bottom box; The strain body is in the shape of an arch bridge, the middle bridge top of the strain body is fixedly connected to the pressure cover, the approach bridges at both ends of the strain body are fixedly connected to the bottom box, and one strain gauge is attached to each of the bridge decks on both sides of the strain body; A gap is left between the bottom peripheral edge of the pressure cover and the top peripheral edge of the bottom box.

3. The massage chair limb pressure testing device according to claim 2, characterized in that: A step is arranged in the shallow hole, the bottom box is sleeved and fixed in the shallow hole, and a gap is left between the bottom peripheral edge of the pressure cover and the hole wall of the shallow hole.

4. The massage chair limb pressure testing device according to claim 3, characterized in that: The cover top of the pressure cover protrudes from the shallow hole.

5. The massage chair limb pressure testing device according to claim 2, characterized in that: A sleeve hole is provided on the middle bridge top of the strain body, and the pressure cover extends downward along the central axis and the umbrella handle is inserted into the sleeve hole for fixing.

6. The massage chair limb pressure testing device according to claim 5, characterized in that: The strain gauge is a metal sheet, and a thickened collar is provided on the bridge top of the strain gauge; A base is integrally provided on the peripheral side of the umbrella handle, and the base is mounted on the top of the thickened collar. The bottom surface of the base and the top surface of the thickened collar are connected via an upwardly convex arc surface.

7. The massage chair limb pressure testing device according to claim 2, characterized in that: A pair of horizontally extending mounting grooves are symmetrically formed on the top peripheral edge of the bottom box, and a guide groove is formed on one side of the mounting groove along the peripheral edge direction; The guide groove extends obliquely, one side of which is communicated with the mounting groove, and the other side of which is provided with an opening on the top surface of the top peripheral edge.

8. The massage chair limb pressure testing device according to claim 2, characterized in that: The bottom box is provided with a group of wiring seats, and the group of wiring seats is longitudinally arranged in the middle of the bottom plate of the bottom box.

9. The massage chair limb pressure testing device according to claim 8, characterized in that: The bottom of the bottom box is provided with a detachable rubber protective cover on the periphery of the first group of wiring seats. The rubber protective cover has a downward convex arc surface, and a through hole for threading is opened in the middle of the arc surface.

10. The massage chair limb pressure testing device according to claim 1, characterized in that: The limb model is made of one of plaster, polyethylene terephthalate or thermoplastic polyurethane.

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