Obstacle-encountering protection structure of telescopic stand column

Abstract

The utility model relates to a barrier-encountering protection structure of a telescopic stand column, which comprises a bearing plate, a strain gauge and a screwing element, the bearing plate is provided with a bearing socket for a transmission mechanism to pass through and be arranged, two sides of the bearing socket are respectively provided with a through hole, and an easy-to-deform area is respectively formed between the bearing socket and each through hole; the strain gauge is arranged on one of the easy-to-deform areas; and the screwing element penetrates through the through hole to fix the bearing plate in the box body. Therefore, the collision damage of the object can be reduced, and the use safety can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of a telescopic column, in particular to a protective structure of a telescopic column against obstacles. Background Art

[0002] Telescopic columns are used in electric beds, nursing beds, hospital beds, electric lifting tables or chairs to adjust the height or elevation angle, which is quite common. When the user encounters an obstacle during the adjustment of the above-mentioned equipment, it will contact the obstacle and generate an interaction force, which will be transmitted to the linear actuator. If the telescopic column does not stop operating immediately, the telescopic column will be damaged by the obstacle; if the obstacle is a human body, it will cause harm to the human body.

[0003] In order to solve the above problems, the industry has set up a resistance protection mechanism that can detect obstacles on the telescopic column. Among the current resistance protection mechanisms, the ones with higher sensitivity use elements that can realize the conversion between pressure signals and electrical signals as resistance detection elements. However, when the deformation amount at the installation position of the resistance detection element is small, the deformation stress generated is not enough to make the resistance detection element generate an obstacle alarm. Only after a period of time after the telescopic column and the obstacle collide, can a sufficiently large deformation stress be generated to trigger the resistance detection element. In addition, the resistance response speed of the existing resistance protection mechanism is too slow, so it cannot meet the actual use needs at this stage. Summary of the invention

[0004] The purpose of the utility model is to provide a telescopic column obstacle protection structure, which can interrupt the movement when the movement process is blocked, thereby reducing the collision damage of objects and improving the safety of use.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a telescopic column obstacle protection structure, the telescopic column includes a box body and a transmission mechanism, the obstacle protection structure includes a bearing plate, a strain gauge and a plurality of screw-fixing elements, the bearing plate is provided with a bearing socket for the transmission mechanism to pass through and be placed, a through hole is respectively provided on both sides of the bearing socket, and an easily deformed area is respectively formed between the bearing socket and each of the through holes; the strain gauge is arranged on one of the easily deformed areas; each of the screw-fixing elements is respectively passed through each of the through holes to fix the bearing plate in the box body.

[0006] The utility model also has the following effects: it can more accurately judge the change of the telescopic column under the external force, and the protection accuracy and sensitivity when encountering obstacles are higher. The shape of the strain gauge is not limited, and the setting position of the strain gauge is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1The utility model is a schematic diagram of an obstacle protection structure of a telescopic column applied to an electric table assembly.

[0008] Figure 2 It is a perspective view of the combined structure of the telescopic column of the utility model for protecting against obstacles.

[0009] Figure 3 It is an exploded view of the obstacle protection structure of the telescopic column of the utility model.

[0010] Figure 4 It is a top view of the obstacle protection structure combination of the telescopic column of the utility model.

[0011] Figure 5 yes Figure 4 Sectional view 5-5.

[0012] Figure 6 yes Figure 4 A magnified view of a local area.

[0013] Figure 7 It is a top view of the combination of the load-bearing plate and the strain gauge of the utility model.

[0014] Wherein, the accompanying drawings are marked as follows:

[0015] 1: Obstacle protection structure 10: Load-bearing plate

[0016] 11: Bearing socket 12: Through hole

[0017] 13: Deformation-prone area 14: Stud

[0018] 20: strain gauge 30: screw-on element

[0019] 40: Fixing layer 50: Shock absorbing gasket

[0020] 8: Electric table 81: Telescopic column

[0021] 82: Box body 821: Bottom plate

[0022] 822: side panel 823: cavity

[0023] 824: Perforation 825: Screw hole

[0024] 83: Motor 84: Transmission mechanism

[0025] 841: Movement 842: Bearing

[0026] 85: Tabletop 86: Screws

[0027] CL: Center line L1: First tangent line

[0028] L2: Second tangent DETAILED DESCRIPTION

[0029] The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings. However, the accompanying drawings are only provided for reference and description and are not intended to limit the present invention.

[0030] See also Figures 1 to 5 As shown, the utility model provides a telescopic column obstacle protection structure, which is applied to an electric table 8 to provide the electric table 8 with the ability to produce height adjustment. The electric table 8 mainly includes at least one telescopic column 81 and a table top 85. The telescopic column 81 mainly includes a box body 82, a motor 83, a transmission mechanism 84 and an obstacle protection structure 1.

[0031] Please read first Figures 2 to 5 The box body 82 is roughly rectangular, and mainly includes a bottom plate 821 and a plurality of side plates 822 connected to the periphery of the bottom plate 821. A cavity 823 is enclosed in the bottom plate 821 and the side plates 822. A through hole 824 and a plurality of screw holes 825 are also provided in the bottom plate 821.

[0032] The motor 83 is accommodated in the cavity 823 of the box body 82 and is a component that can generate forward and reverse rotations.

[0033] The transmission mechanism 84 mainly includes a movement 841 and a bearing 842 . The movement 841 penetrates into the box body 82 through the aforementioned through hole 824 to be connected with the motor 83 , and the bearing 842 is sleeved on one end of the movement 841 .

[0034] The obstacle protection structure 1 of the present invention mainly includes a bearing plate 10 , a strain gauge 20 and two screw-fastening elements 30 .

[0035] The carrier plate 10 is provided with a bearing socket 11 for the movement 841 of the transmission mechanism 84 to pass through and for the bearing 842 to be placed. A through hole 12 is provided on both sides of the bearing socket 11 of the carrier plate 10, and an easily deformed area 13 is formed between the bearing socket 11 of the carrier plate 10 and each through hole 12. In addition, a stud 14 is connected to the corner end of the easily deformed area 13 of the carrier plate 10, and the motor 83 is screwed to the stud 14 by two screws 86 passing through the motor 83. A center line CL (such as Figure 7 As shown), this center line CL passes through the center of the aforementioned transmission mechanism 84 (as shown Figure 4 shown).

[0036] The strain gauge 20 is arranged on one of the easily deformable areas 13, and is composed of an insulating substrate and a metal sensitive grid. When the measured component is deformed by external force, the sensitive grid is also deformed, so the resistance value of the sensitive grid will change accordingly. This tiny resistance change can be measured by a Wheatstone bridge, and the measured resistance change can be converted into an actual strain value by the strain gauge coefficient indicated by the strain gauge manufacturer. The strain gauge 20 is electrically connected to a control device (not shown), and the control device is used to cut off the power or make the motor 83 rotate in the opposite direction, so as to protect the rise or fall of the telescopic column 81.

[0037] Each screw-fastening element 30 penetrates each through hole 12 to fix the carrier plate 10 in the box body 82 .

[0038] See also Figure 6 As shown, in one embodiment, the obstacle protection structure 1 of the utility model further includes a fixing layer 40, which is between the strain gauge 20 and the bottom plate 821, and is used to closely bond the strain gauge 20 to the bottom plate 821. The fixing layer 40 can be a component formed by curing 502 glue (cyanoacrylate).

[0039] In one embodiment, the obstacle protection structure 1 of the present invention further includes two shock-absorbing washers 50 . Each shock-absorbing washer 50 is embedded in each of the through holes 12 to allow the screw-fastening elements 30 to pass through and be fixed.

[0040] When in use, when the telescopic column 81 increases the load, the deformation of the easily deformed area 13 of the load-bearing plate 10 will increase, and the deformation of the strain gauge 42 will also increase. The strain gauge 42 outputs this signal as the deformation changes. When the telescopic column 81 reduces the load, the deformation of the easily deformed area 13 of the load-bearing plate 10 will decrease, and the deformation of the strain gauge 42 will also decrease. The strain gauge 42 outputs this signal as the deformation changes.

[0041] When the telescopic column 81 is subjected to load changes, the easily deformed area 13 of the load-bearing plate 10 is deformed. As the deformation of the load-bearing plate 10 and the strain gauge 42 changes, the strain gauge 42 generates a signal output, thereby achieving a protective effect for the telescopic column 81 when encountering obstacles.

[0042] See also Figure 7As shown, a center line CL is defined through the center of each through hole 12, a first tangent line L1 is defined through the circumference of the through hole 12 and adjacent to the side of the bearing socket 11, and a second tangent line L2 is defined through the circumference of the bearing socket 11 and adjacent to the side of the through hole 12. The first tangent line L1 and the second tangent line L2 are respectively perpendicular to the center line CL. The aforementioned easy-to-deform area 13 is an area enclosed by the first tangent line L1 to the second tangent line L2, and the aforementioned strain gauge 20 is arranged on this easy-to-deform area 13.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the patent scope of the present utility model. Other equivalent changes that apply the patent spirit of the present utility model should all fall within the patent protection scope of the present utility model.

Claims

1. A telescopic column obstacle protection structure, the telescopic column comprising a box body and a transmission mechanism, characterized in that: The obstacle protection structure includes: A bearing plate, provided with a bearing socket for the transmission mechanism to pass through and be placed, a through hole is respectively provided on both sides of the bearing socket, and an easily deformable area is respectively formed between the bearing socket and each of the through holes; and a strain gauge disposed on one of the easily deformable regions; and A plurality of screw fixing elements are respectively provided through the through holes to fix the carrying plate in the box body.

2. The obstacle protection structure of the telescopic column according to claim 1, characterized in that: It also includes a fixing layer. The box body has a bottom plate. The fixing layer is between the strain gauge and the bottom plate.

3. The obstacle protection structure of the telescopic column according to claim 1, characterized in that: A center line is defined through the center of each through hole, and the center line passes through the center of the transmission mechanism.

4. The obstacle protection structure of the telescopic column according to claim 1, characterized in that: A center line is defined through the center of each through hole, a first tangent is defined through the circumference of each through hole, and a second tangent is defined through the circumference of the bearing socket. The first tangent and the second tangent are respectively perpendicular to the center line, and the easily deformable area is an area enclosed by the first tangent to the second tangent.

5. The obstacle protection structure of the telescopic column according to claim 1, characterized in that: It also includes a plurality of shock-absorbing washers, each of which is embedded in each of the through holes so that each of the screw-fixing elements can pass through and be fixed.

6. The obstacle protection structure of the telescopic column according to claim 1, characterized in that: Each of the easily deformable areas of the bearing plate is connected to a stud respectively, and the telescopic column further comprises an electric motor, and the electric motor is screwed to each of the studs through a plurality of screws.

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