Sofa comprehensive testing machine

Abstract

The present invention discloses a comprehensive sofa testing machine, which includes a frame, a lifting frame body, a seat surface testing mechanism and a lifting driving device. The seat surface testing mechanism includes a seat surface impact hammer, upper and lower guide frames, a seat surface driver, rollers, an electromagnet and a matching suction member. The seat surface driver is fixed to the lifting frame body, the upper and lower guide frames are slidably arranged on the lifting frame body, and the seat surface impact hammer is fixedly connected to the upper and lower guide frames; the rollers are respectively installed on both sides of the upper and lower guide frames and are in rolling cooperation with the lifting frame body, one of the electromagnet and the matching suction member is installed at the output end of the seat surface driver, and the other of the electromagnet and the matching suction member is installed at the upper and lower guide frames; when the electromagnet is powered on and magnetically adsorbs the matching suction member, the seat surface driver can drive the seat surface impact hammer to lift upward through the upper and lower guide frames, and then the lifted seat surface impact hammer freely falls when the electromagnet is powered off and the rollers roll on the lifting frame body; so as to avoid the influence of the seat surface impact hammer on the seat surface driver during the free fall test of the seat surface and ensure the reliability of the test.

Description

Technical Field

[0001] The present invention relates to the field of sofa testing, and particularly to a comprehensive sofa testing machine. Background Art

[0002] As is well known, sofas are increasingly widely used in home, office and other environments. In order to ensure that the sofas put on the market meet the design standard requirements, it is necessary to conduct comprehensive tests on the backrest, seat surface, armrests and other positions of the sofas, so the use of a testing machine is indispensable.

[0003] For example, in a sofa durability testing machine disclosed in Chinese Patent Application No. 201720893095.3, its seat surface testing mechanism is provided with a seat surface driving cylinder. The cylinder shaft of the seat surface driving cylinder is drivingly connected to a push rod through a connecting block. The push rod extends in a direction opposite to the moving direction of the cylinder shaft and is arranged on both sides of the seat surface driving cylinder. The end of the push rod is connected to a seat surface impact hammer. The main body of the seat surface driving cylinder is fixed to the bottom of the sofa detection frame. The cylinder shaft of the seat surface driving cylinder drives the seat surface impact hammer to move up and down through the push rod to conduct a durability test on the seat surface of the sofa.

[0004] However, in the above-mentioned sofa durability testing machine, since the push rod fixedly connected to the seat surface impact hammer is fixedly connected to the cylinder shaft of the seat surface driving cylinder through a connecting block, when the seat surface impact hammer makes a free fall downward to impact the seat surface of the sofa, the seat surface impact hammer also drives the cylinder shaft of the seat surface driving cylinder to slide downward together. This will cause interference to the test of the seat surface impact hammer making a free fall downward to impact the seat surface of the sofa, and at the same time will also cause damage to the cylinder shaft of the seat surface driving cylinder.

[0005] Therefore, there is an urgent need for a comprehensive sofa testing machine to overcome one or more of the above defects. Summary of the Invention

[0006] The purpose of the present invention is to provide a comprehensive sofa testing machine to avoid the influence on the seat surface driver when the seat surface impact hammer makes a free fall downward to impact the seat surface of the sofa, so as to ensure the reliability of the test.

[0007] To achieve the above object, the sofa comprehensive testing machine of the present invention includes a frame, a lifting frame body that moves up and down along the vertical direction of the frame, a seat surface testing mechanism installed on the lifting frame body, and a lifting drive device assembled between the frame and the lifting frame body. The lifting drive device drives the lifting frame body to move up and down. The seat surface testing mechanism includes a seat surface impact hammer, an upper and lower guide frame, a seat surface driver, rollers, an electromagnet, and a matching suction member that is vertically aligned with the electromagnet and magnetically adsorbed by the electromagnet; the seat surface driver is fixedly installed on the lifting frame body and the output end is arranged downward, the upper and lower guide frame is located directly below the output end and slides along the vertical direction of the frame on the lifting frame body, the seat surface impact hammer is located directly below the upper and lower guide frame and is fixedly connected to the upper and lower guide frame; the rollers are respectively assembled on opposite sides of the upper and lower guide frame and are in rolling cooperation with the side wall of the lifting frame body, one of the electromagnet and the matching suction member is assembled at the output end of the seat surface driver, and the other of the electromagnet and the matching suction member is assembled on the upper and lower guide frame; wherein, when the electromagnet is powered on and magnetically adsorbs the matching suction member, the seat surface driver can lift the seat surface impact hammer upward through the upper and lower guide frame, and then the lifted seat surface impact hammer freely falls when the electromagnet loses power and the rollers roll on the lifting frame body.

[0008] Preferably, the lifting frame body is a square frame body, the upper and lower guide frame includes two guide rods arranged relatively spaced apart and a cross plate fixedly connected to the upper ends of the guide rods. The cross plate is placed in the internal space of the lifting frame body. The lower ends of the guide rods slide out downward from the bottom of the lifting frame body and are fixedly connected to the seat surface impact hammer. The rollers are installed on the cross plate and are in rolling cooperation with the side wall of the lifting frame body. The matching suction member is formed on the cross plate. The seat surface driver is fixed to the top of the lifting frame body, and the output end of the seat surface driver passes downward through the top of the lifting frame body and extends toward the cross plate.

[0009] Preferably, the side wall of the lifting frame body is provided with upper and lower linear grooves, and the roller has a circular convex ring protruding outward. The circular convex ring is fitted in the upper and lower linear grooves.

[0010] Preferably, the sofa comprehensive testing machine of the present invention further includes a backrest testing mechanism, an upper and lower sliding seat, a turntable, a first locking member and a second locking member. The upper and lower sliding seat is slidably disposed on the side wall of the lifting frame body along the up and down direction of the frame. The first locking member is assembled on the upper and lower sliding seat and selectively locks or releases the position of the upper and lower sliding seat on the lifting frame body. The turntable is rotatably connected to the upper and lower sliding seat to define a rotation center line. An arc-shaped long hole with its arc center located on the rotation center line is formed on the turntable. The second locking member passes through the arc-shaped long hole and is assembled and connected to the upper and lower sliding seat. The second locking member selectively locks or releases the angular adjustment of the turntable relative to the upper and lower sliding seat around the rotation center line. The backrest testing mechanism is fixedly installed on the turntable.

[0011] Preferably, the sofa comprehensive testing machine of the present invention further includes an armrest testing mechanism, an armrest lifting bracket and an armrest height adjustment mechanism. Avoidance spaces are formed on the side walls of the left and right sides of the lifting frame body, and the avoidance spaces are communicated with the internal space of the lifting frame body. The armrest lifting bracket is located in the internal space of the lifting frame body and also extends out from the avoidance space. The armrest testing mechanism is assembled at the position where the armrest lifting bracket extends out of the avoidance space. The armrest height adjustment mechanism is installed on the lifting frame body and drives the armrest testing mechanism to make height adjustment.

[0012] Preferably, the sofa comprehensive testing machine of the present invention further includes a front and rear adjustment mechanism for adjusting the armrest height adjustment mechanism in the front and rear direction of the frame. The front and rear adjustment mechanism includes a front and rear guide rod, a front and rear sliding frame and a front and rear locking member. The front and rear guide rod is fixedly installed on the side wall of the lifting frame body. The front and rear sliding frame is slidably disposed on the front and rear guide rod. The front and rear locking member is assembled on the front and rear sliding frame and selectively locks or releases the position of the front and rear sliding frame on the lifting frame body. The armrest height adjustment mechanism is fixedly connected to the front and rear sliding frame.

[0013] Preferably, the armrest height adjustment mechanism includes a top beam located directly above the lifting frame body, an intermediate beam located in the internal space of the lifting frame body and extending out from the avoidance space, a bottom beam located directly below the intermediate beam, a lifting screw rod rotatably passing through the top beam, the intermediate beam and the bottom beam, and two connecting rods arranged in a left-right spaced manner along the left and right direction of the frame. The connecting rods are located beside the lifting screw rod and slidably pass through the intermediate beam. The connecting rods are also fixedly connected to the top beam and the bottom beam respectively. A hand crank is fixedly installed on the top beam on the lifting screw rod. The front and rear sliding frame is fixedly connected to the intermediate beam. An elevator nut sleeved on the lifting screw rod is also fixedly installed on the intermediate beam. The armrest lifting bracket is fixedly installed on the bottom beam.

[0014] Preferably, the armrest lifting bracket is also provided with a left and right slide that slides along the left and right directions of the frame, and the left and right slides are equipped with a left and right locking piece, and the left and right locking piece selectively locks or releases the position of the left and right slides on the armrest lifting bracket, and the armrest testing mechanism is fixedly installed on the left and right slides.

[0015] Preferably, the sofa comprehensive testing machine of the present invention also includes a deformation testing mechanism fixedly connected to the lifting frame, the deformation testing mechanism is located below the corresponding lifting frame, and the deformation testing mechanism is also staggered with the lifting frame in the front-to-back direction of the frame.

[0016] Preferably, the sofa comprehensive testing machine of the present invention further comprises a workbench located right in front of the frame, the workbench is equipped with a plurality of columns arranged in a rectangular shape with the frame, and each of the columns is equipped with a displacement sensor.

[0017] When the cam is in the upright position, the upper and lower guide frames are moved upwards and downwards, thereby achieving the desired effect. Since the seat impact hammer is disconnected from the seat driver during the downward free fall motion, the seat impact hammer will not affect the seat driver during the downward free fall motion, thereby ensuring the reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a three-dimensional diagram of a sofa comprehensive testing machine with a sofa placed on a workbench.

[0019] Figure 2 It is a three-dimensional diagram of the lifting frame of the sofa comprehensive testing machine of the present invention and the seat surface testing mechanism, lifting drive device, backrest testing mechanism, armrest testing mechanism, armrest lifting bracket, armrest height adjustment mechanism and front and rear adjustment mechanism on the lifting frame.

[0020] Figure 3 yes Figure 23D exploded view of .

[0021] Figure 4 yes Figure 2 Plan view viewed in the direction indicated by arrow D.

[0022] Figure 5 yes Figure 2 Plan view viewed in the direction of arrow E.

[0023] Figure 6 It is a three-dimensional diagram of the lifting frame and the seat surface testing mechanism thereon in the sofa comprehensive testing machine of the present invention.

[0024] Figure 7 yes Figure 6 A plan view when viewed in the direction of arrow G and when the seat drive is connected to the upper and lower guide frames.

[0025] Figure 8 yes Figure 7 Plan view of the seat drive with the upper and lower guide frames disconnected.

[0026] Figure 9 The present invention is a three-dimensional diagram of an armrest testing mechanism, an armrest lifting bracket and an armrest height adjustment mechanism assembled together in a sofa comprehensive testing machine. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0028] See also Figure 1 、 Figure 4 and Figure 7 The sofa comprehensive testing machine 100 of the present invention comprises a frame 10, a lifting frame body 20 that moves up and down along the frame 10, a seat surface testing mechanism 30 installed on the lifting frame body 20, and a lifting drive device 40 installed between the frame 10 and the lifting frame body 20. The lifting drive device 40 drives the lifting frame body 20 to move up and down. Figure 2 and Figure 3 As an example, the lifting drive device 40 is mainly composed of a lifting motor 41, a belt drive 42 and a screw nut drive 43, so that the lifting drive device 40 can accurately and reliably drive the lifting frame 20 to perform lifting movements on the frame 10. Of course, according to actual needs, the lifting drive device 40 can also be composed of a motor 41 and a screw nut drive 43, so it is not used here. Figure 2 and Figure 3 Limits shown.

[0029] At the same time, Figure 4 、 Figure 6 、 Figure 7 and Figure 8As shown, the seat surface testing mechanism 30 includes a seat surface impact hammer 31, upper and lower guide frames 32, a seat surface driver 33, rollers 34, an electromagnet 35, and a matching suction part 36 that is vertically aligned with the electromagnet 35 and magnetically adsorbed by the electromagnet 35. The seat surface driver 33 is fixedly installed on the lifting frame body 20. The lifting frame body 20 provides support for the seat surface driver 33 and also meets the requirement for the seat surface driver 33 to move up and down together with the lifting frame body 20. Moreover, the output end 331 of the seat surface driver 33 is arranged downward to facilitate the assembly operation with the electromagnet 35 or the matching suction part 36. Optionally, in Figures 1 to 8 the seat surface driver 33 is a cylinder. Of course, it can be selected as a hydraulic cylinder according to actual needs, so this is not limited thereto. The upper and lower guide frames 32 are located directly below the corresponding output end 331 and slide on the lifting frame body 20 along the up and down direction of the machine frame 10 to meet the need for the upper and lower guide frames 32 to slide on the lifting frame body 20. The seat surface impact hammer 31 is located directly below the corresponding upper and lower guide frames 32 and is fixedly connected to the upper and lower guide frames 32 to meet the need for the seat surface impact hammer 31 to move up and down together with the upper and lower guide frames 32. The rollers 34 are respectively assembled on the opposite sides of the upper and lower guide frames 32, such as but not limited to Figure 4 、 Figure 7 and Figure 8 shown on the left and right sides. The rollers 34 also rollingly cooperate with the lifting frame body 20 so that the upper and lower guide frames 32 can move up and down more smoothly and smoothly under the rolling cooperation of the rollers 34 on the left and right sides of the upper and lower guide frames 32 and the lifting frame body 20. The electromagnet 35 is assembled at the output end 331 of the seat surface driver 33, and the matching suction part 36 is assembled on the upper and lower guide frames 32. Of course, according to actual needs, the electromagnet 35 can also be assembled on the upper and lower guide frames 32 and the matching suction part 36 can be assembled at the output end 331 of the seat surface driver 33, so it is not Figure 8 limited as shown. Among them, when the electromagnet 35 is powered on and magnetically adsorbs the matching suction part 36, the seat surface driver 33 can lift the seat surface impact hammer 31 upward through the upper and lower guide frames 32, and the state is shown in Figure 7 ; at this time, when the electromagnet 35 loses power, the electromagnet 35 disconnects from the matching suction part 36, and then the lifted seat surface impact hammer 31 freely falls under the rolling of the rollers 34 on the lifting frame body 20. The power of the free fall comes from the gravity of the seat surface impact hammer 31, the upper and lower guide frames 32, and the rollers 34, mainly from the gravity of the seat surface impact hammer 31. More specifically, as follows:

[0030] As Figures 6 to 8As shown, the lifting frame body 20 is a square frame body. The upper and lower guide frames 32 include two relatively spaced-apart guide rods 321 and a cross plate 322 fixedly connected to the upper ends of the guide rods 321. The cross plate 322 is placed in the internal space 21 of the lifting frame body 20. The lower ends of the guide rods 321 slide out downward from the bottom 22 of the lifting frame body 20 and are fixedly connected to the seat surface impact hammer 31. The rollers 34 are installed on the cross plate 322 and are in rolling cooperation with the side wall 23 of the lifting frame body 20. This design makes the assembly between the upper and lower guide frames 32 and the lifting frame body 20 more compact and makes the movement of the upper and lower guide frames 32 on the lifting frame body 20 more reliable; the matching and attracting member 36 is formed on the cross plate 322. That is to say, the area of the cross plate 332 that is vertically aligned with the electromagnet 35 forms the matching and attracting member 36; the seat surface driver 33 is fixed to the top 24 of the lifting frame body 20. The output end 331 of the seat surface driver 33 passes downward through the top 24 of the lifting frame body 20 and extends toward the cross plate 322. This design arranges the seat surface driver 33 outside the top 24 of the lifting frame body 20, avoiding the seat surface driver 33 from occupying the internal space 21 of the lifting frame body 20, thus providing sufficient space for the upper and lower guide frames 32 to drive the seat surface impact hammer 31 to lift and lower on the lifting frame body 20, and thus enabling the seat surface impact hammer 31 to obtain a greater impact stroke. Specifically, in Figure 6 as an example, the side wall 23 of the lifting frame body 20 is provided with upper and lower linear grooves 231. The roller 34 has a circular convex ring 341 protruding outward. The circular convex ring 341 is fitted into the upper and lower linear grooves 231 to effectively prevent the upper and lower guide frames 32 from deviating during the lifting and sliding on the lifting frame body 20, thereby making the sensitivity and smoothness of the upper and lower guide frames 32 sliding on the lifting frame body 20. It should be noted that when the rollers 34 are respectively assembled on the left and right sides of the upper and lower guide frames 32, correspondingly, the upper and lower linear grooves 231 are opened on the side walls 23 on the left and right sides of the lifting frame body 20. When the rollers 34 are respectively assembled on the front and back sides of the upper and lower guide frames 32, correspondingly, the upper and lower linear grooves 231 are opened on the side walls 23 on the front and back sides of the lifting frame body 20.

[0031] Such as Figures 1 to 5As shown, the sofa comprehensive testing machine 100 of the present invention further includes a backrest testing mechanism 51, an upper and lower sliding seat 52, a turntable 53, a first locking member 54 and a second locking member 55. The upper and lower sliding seat 52 is slidably disposed on the side wall 23 of the lifting frame body 20 along the up and down direction of the frame 10. Alternatively, as an example, the upper and lower sliding seats 52 are slidably disposed on the side walls 23 on the left and right sides of the frame 10 respectively; the first locking member 54 is assembled on the upper and lower sliding seat 52 and selectively locks or releases the position of the upper and lower sliding seat 52 on the lifting frame body 20. Alternatively, as an example, the first locking member 54 is a screw with a knob, but not limited thereto. In addition, since the upper and lower sliding seats 52 are slidably disposed on the side walls 23 on the left and right sides of the frame 10 respectively, correspondingly, each upper and lower sliding seat 52 is equipped with a first locking member 54, so that with the help of the first locking member 54, it is convenient for the operator to adjust the upper and lower sliding seat 52. The turntable 53 is rotatably connected to the upper and lower sliding seat 52 to define a rotation center line 56. An arc-shaped long hole 531 with its arc center located on the rotation center line 56 is formed on the turntable 53. The second locking member 55 passes through the arc-shaped long hole 531 and is assembled and connected to the upper and lower sliding seat 52. The second locking member 55 selectively locks or releases the angle adjustment of the turntable 53 relative to the upper and lower sliding seat 52 around the rotation center line 56; the backrest testing mechanism 51 is fixedly installed on the turntable 53; therefore, when adjusting the angle of the backrest testing mechanism 51, the operator can operate the second locking member 55. It should be noted that when the upper and lower sliding seats 52 are slidably disposed on the side walls 23 on the left and right sides of the frame (0000101)10 respectively, at this time, each upper and lower sliding seat 52 corresponds to a turntable 53, a second locking member 55 and a backrest testing mechanism 51; in addition, the second locking member 55 can be a screw with a knob; in addition, for the specific structure of the backrest testing mechanism 51, reference can be made to the patent documents introduced in the background technology of the present application, so it will not be elaborated here.

[0032] As Figures 1 to 5As shown in the figure, the sofa comprehensive testing machine 100 of the present invention further includes an armrest testing mechanism 61, an armrest lifting bracket 62, an armrest height adjustment mechanism 63, and a front and rear adjustment mechanism 64 for adjusting the front and rear positions of the armrest height adjustment mechanism 63 along the front and rear directions of the frame 10. Avoidance spaces 232 are provided on the side walls 23 on the left and right sides of the lifting frame body 20, and the avoidance spaces 232 are communicated with the internal space 21 of the lifting frame body 20; the armrest lifting bracket 62 is located in the internal space 21 of the lifting frame body 20, and the armrest lifting bracket 62 also extends out from the avoidance space 232, so that the assembly between the armrest lifting bracket 62 and the lifting frame body 20 is more compact; the armrest testing mechanism 61 is assembled at the position where the armrest lifting bracket 62 extends out of the avoidance space 232, so that the armrest testing mechanism 61 is located outside the lifting frame body 20 and is convenient for testing the armrests of the sofa 200; the armrest height adjustment mechanism 63 is installed on the lifting frame body 20 and interlocks with the armrest testing mechanism 61 to make height adjustments; the front and rear adjustment mechanism 64 includes front and rear guide rods 641, a front and rear carriage 642, and a front and rear locking member 643. The front and rear guide rods 641 are fixedly installed on the side wall 23 of the lifting frame body 20, the front and rear carriage 642 slides on the front and rear guide rods 641, the front and rear locking member 643 is assembled on the front and rear carriage 641 and selectively locks or releases the position of the front and rear carriage 642 on the lifting frame body 20. The armrest height adjustment mechanism 63 is fixedly connected to the front and rear carriage 642. Such a design enables the armrest testing mechanism 61 to be adjusted in the front and rear directions and the up and down directions of the lifting frame body 20. It should be noted that due to the avoidance spaces 232 provided on the side walls 23 on the left and right sides of the lifting frame body 20, the left and right ends of the armrest lifting bracket 62 extend out from their respective corresponding avoidance spaces 232. Correspondingly, the armrest testing mechanisms 61 are respectively assembled at the left and right ends of the armrest lifting bracket 62. Correspondingly, the front and rear carriage 642 and the front and rear guide rods 641 are respectively arranged on the side walls 23 on the left and right sides of the lifting frame body 20. More specifically, as follows:

[0033] As Figure 9 shown, the armrest height adjustment mechanism 63 includes a top beam 631 located directly above the lifting frame body 20, an intermediate beam 632 located in the internal space 21 of the lifting frame body 20 and extending out from the avoidance space 232, a bottom beam 633 located directly below the intermediate beam 632, a lifting screw rod 634 rotatably passing through the top beam 631, the intermediate beam 632, and the bottom beam 633, and two connecting rods 635 arranged in a left-right spaced arrangement along the left and right directions of the frame 10. The connecting rods 635 are located beside the lifting screw rod 634 and slidably pass through the intermediate beam 632. The connecting rods 635 are also fixedly connected to the top beam 631 and the bottom beam 633 respectively. A hand crank 636 located on the top beam 631 is fixedly installed on the lifting screw rod 634. The front and rear carriage 642 is fixedly connected to the intermediate beam 632. The state is shown in Figure 5As shown in the figure; there is also a lifting nut 637 sleeved on the lifting screw rod 634 fixedly installed on the middle beam 632. The armrest lifting bracket 62 is fixedly installed on the bottom beam 633. Such a design makes the layout between the armrest height adjustment mechanism 63 and the lifting frame body 20 more reasonable and compact. And during the process that the operator drives the lifting screw rod 634 to rotate by the hand crank 635, since the middle beam 632 is fixedly connected with the front and rear carriage 642, the middle beam 632 cannot move up and down and slide on the lifting frame body 20, and the middle beam 632 is fixed with the lifting nut 637. Therefore, the rotating lifting screw rod 634 drives the top beam 631, the bottom beam 633, the armrest lifting bracket 62, the armrest testing mechanism 61, the connecting rod 635 and the hand crank 636 to move up and down relative to the lifting frame body 20 together, so as to meet the height position adjustment requirement of the armrest testing mechanism 61. Specifically, in Figure 9 As an example, there is also a left and right sliding seat 65 arranged on the armrest lifting bracket 62 and sliding in the left and right direction of the frame 10. A left and right locking member 66 is assembled on the left and right sliding seat 65. The left and right locking member 66 selectively locks or releases the position of the left and right sliding seat 65 on the armrest lifting bracket 62. The armrest testing mechanism 61 is fixedly installed on the left and right sliding seat 65. By means of the cooperation of the left and right locking member 66 and the left and right sliding seat 65, the armrest testing mechanism 61 can also be adjusted by sliding in the left and right direction of the frame 10, so the applicability is better. It should be noted that when the armrest testing mechanisms 61 are arranged one on the left and one on the right, combined with the fact that the armrest testing mechanisms 61 are assembled at the left and right sliding seats 65, correspondingly, the left and right sliding seats 65 are also arranged one on the left and one on the right, and each left and right sliding seat 65 is respectively assembled with a left and right locking member 66. The left and right locking member 66 can be a screw with a knob, but not limited thereto; in addition, for the specific structure of the armrest testing mechanism 61, reference can be made to the patent documents introduced in the background art of the present application, so it will not be elaborated here.

[0034] As Figure 2 and Figure 3 shown in the figure, the sofa comprehensive testing machine 100 of the present invention further includes a deformation amount testing mechanism 70 fixedly connected with the lifting frame body 20 and a workbench 80 located directly in front of the frame 10. The deformation amount testing mechanism 70 is located below the corresponding lifting frame body 20. The deformation amount testing mechanism 70 is also arranged in a front and rear dislocation with the lifting frame body 20 along the front and rear direction of the frame 10, that is, the deformation amount testing mechanism 70 is located at the rear and the lifting frame body 20 is located at the front, so as to avoid interference between the deformation amount testing mechanism 70 and the seat surface impact hammer 31. A plurality of upright columns 90 jointly arranged in a rectangular shape with the frame 10 are assembled on the workbench 80. A displacement sensor 91, such as a laser position sensor, is assembled on each upright column 90 to effectively detect the position of the sofa 200 placed on the workbench 80, providing a reliable data source for subsequent data analysis; in addition, for the specific structure of the deformation amount testing mechanism 70, reference can be made to the patent documents introduced in the background art of the present application, so it will not be elaborated here.

[0035] Compared with the prior art, the seat driver 33 selectively connects or disconnects with the upper and lower guide frames 32 equipped with the seat impact hammer 31 through the cooperation of the electromagnet 35 and the suction piece 36, and the upper and lower guide frames 32 are respectively equipped with rollers 34 on opposite sides, and all the rollers 34 roll with the lifting frame 20 along the up and down directions of the frame 10. Therefore, with the help of the rollers 34 on the opposite sides of the upper and lower guide frames 32, the upper and lower guide frames 32 can slide up and down on the lifting frame 20 more steadily and smoothly, and in combination with the cooperation of the electromagnet 35 and the suction piece 36, the seat When the electromagnet 35 is energized, the surface driver 33 magnetically attracts the attachment 36, driving the upper and lower guide frames 32 and the seat hammer 31 to slide upward. When the slide reaches the desired position, the electromagnet 35 is de-energized, losing its magnetic attraction to the attachment 36, causing the seat driver 33 to disconnect from the upper and lower guide frames 32. The disconnected upper and lower guide frames 32, the seat hammer 31, and the roller 34 thereon, then freely fall downward under their own weight, thereby achieving the purpose of the seat hammer 31 impacting the sofa seat. Since the seat hammer 31 is disconnected from the seat driver 33 during its downward free-fall motion, the downward free-fall motion of the seat hammer 31 does not affect the seat driver 33, thereby ensuring the reliability of the test.

[0036] It is worth noting that in the drawings, the direction indicated by arrow A is the direction from top to bottom of the rack 10, the direction indicated by arrow B is the direction from left to right of the rack 10, and the direction indicated by arrow C is the direction from front to back of the rack 10.

[0037] The above disclosure is merely a preferred embodiment of the present invention, which is intended to facilitate understanding and implementation by those skilled in the art. It certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A sofa comprehensive testing machine, comprising a frame, a lifting frame body that performs lifting and lowering movements along the up and down directions of the frame, a seat surface testing mechanism installed on the lifting frame body, and a lifting drive device assembled between the frame and the lifting frame body, the lifting drive device drives the lifting frame body to perform lifting and lowering movements, the seat surface testing mechanism comprises a seat surface impact hammer, an upper and lower guide frame, and a seat surface driver, the seat surface driver is fixedly mounted on the lifting frame body with the output end facing downward, the upper and lower guide frames are located below the corresponding output ends and are slidably arranged on the lifting frame body along the up and down directions of the frame, the seat surface impact hammer is located below the corresponding upper and lower guide frames and is fixedly connected to the upper and lower guide frames, characterized in that The seat surface testing mechanism further comprises a roller, an electromagnet and a suction piece aligned with the electromagnet up and down and magnetically attracted by the electromagnet, the rollers being respectively mounted on opposite sides of the upper and lower guide frames and rollingly cooperating with the lifting frame body, one of the electromagnet and the suction piece being mounted at the output end of the seat surface driver, and the other of the electromagnet and the suction piece being mounted at the upper and lower guide frames; wherein, when the electromagnet is energized to magnetically attract the suction piece, the seat surface driver can drive the seat surface impact hammer to lift upward through the upper and lower guide frames, and then the lifted seat surface impact hammer will freely fall when the electromagnet loses power and the roller rolls on the lifting frame body; The lifting frame body is a square frame body, and the upper and lower guide frames include two guide rods arranged relatively spaced apart and a horizontal plate fixedly connected to the upper ends of the guide rods. The horizontal plate is placed in the internal space of the lifting frame body, and the lower end of the guide rod slides downward from the bottom of the lifting frame body and is fixedly connected to the seat impact hammer. The roller is installed on the horizontal plate and rolls with the side wall of the lifting frame body. The suction piece is formed on the horizontal plate, and the seat driver is fixed to the top of the lifting frame body. The output end of the seat driver passes downward through the top of the lifting frame body and extends to the horizontal plate.

2. The sofa comprehensive testing machine according to claim 1, characterized in that: The side wall of the lifting frame is provided with upper and lower linear grooves, and the roller is provided with a circular convex ring protruding outward, and the circular convex ring is matchedly placed in the upper and lower linear grooves.

3. The sofa comprehensive testing machine according to claim 1, characterized in that: The cam is secured to the side of the lift frame by means of a first locking member and a second locking member, wherein the first locking member is secured to the side of the lift frame by means of a first locking member and a second locking member.

4. The sofa comprehensive testing machine according to claim 1, characterized in that: It also includes an armrest testing mechanism, an armrest lifting bracket and an armrest height adjustment mechanism. The side walls on the left and right sides of the lifting frame are provided with avoidance spaces, and the avoidance spaces are connected to the internal space of the lifting frame. The armrest lifting bracket is located in the internal space of the lifting frame, and the armrest lifting bracket also extends from the avoidance space. The armrest testing mechanism is assembled at the position where the armrest lifting bracket extends out of the avoidance space. The armrest height adjustment mechanism is installed on the lifting frame and links the armrest testing mechanism to make height adjustments.

5. The sofa comprehensive testing machine according to claim 4, characterized in that: It also includes a front-to-back adjustment mechanism for adjusting the armrest height adjustment mechanism along the front-to-back direction of the frame, the front-to-back adjustment mechanism includes front-to-back guide rods, front-to-back slides and front-to-back locking pieces, the front-to-back guide rods are fixedly mounted on the side walls of the lifting frame body, the front-to-back slides are slid on the front-to-back guide rods, the front-to-back locking pieces are assembled on the front-to-back slides and selectively lock or release the positions of the front-to-back slides on the lifting frame body, and the armrest height adjustment mechanism is fixedly connected to the front-to-back slides.

6. The sofa comprehensive testing machine according to claim 5, characterized in that: The armrest height adjustment mechanism includes a top beam located directly above the lifting frame body, an intermediate beam located in the internal space of the lifting frame body and extending from the avoidance space, a bottom beam located directly below the intermediate beam, a lifting screw rod rotatably inserted into the top beam, the intermediate beam and the bottom beam, and two connecting rods arranged one on the left and one on the right along the left and right directions of the frame, the connecting rods being located on the sides of the lifting screw rod and slidingly passing through the intermediate beam, the connecting rods being fixedly connected to the top beam and the bottom beam respectively, a hand crank handle located on the top beam being fixedly mounted on the lifting screw rod, the front and rear slides being fixedly connected to the intermediate beam, a lifting nut mounted on the lifting screw rod being fixedly mounted on the intermediate beam, and the armrest lifting bracket being fixedly mounted on the bottom beam.

7. The sofa comprehensive testing machine according to claim 6, characterized in that: The armrest lifting bracket is also provided with a left and right slide that slides along the left and right directions of the frame. The left and right slides are equipped with a left and right locking piece. The left and right locking piece selectively locks or releases the position of the left and right slides on the armrest lifting bracket. The armrest testing mechanism is fixedly installed on the left and right slides.

8. The sofa comprehensive testing machine according to claim 1, characterized in that: It also includes a deformation testing mechanism fixedly connected to the lifting frame body, the deformation testing mechanism is located below the corresponding lifting frame body, and the deformation testing mechanism is also staggered with the lifting frame body in a front-to-back direction along the front-to-back direction of the frame.

9. The sofa comprehensive testing machine according to claim 1, characterized in that: It also includes a workbench located in front of the frame, on which a plurality of columns arranged in a rectangular shape with the frame are mounted, and each column is equipped with a displacement sensor.

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