CN104000420A - Bed with vibration damping combinations - Google Patents
Bed with vibration damping combinations Download PDFInfo
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- CN104000420A CN104000420A CN201410235154.9A CN201410235154A CN104000420A CN 104000420 A CN104000420 A CN 104000420A CN 201410235154 A CN201410235154 A CN 201410235154A CN 104000420 A CN104000420 A CN 104000420A
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- vibration damping
- spring
- bed
- shock absorber
- damping combination
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Abstract
The invention discloses a bed with vibration damping combinations. The bed comprises a main frame, four vibration damping combinations, a vertical beam and a swing arm, wherein the main frame consists of a cross beam, a longitudinal beam and a bed board, the upper end of each vibration damping combination is rotationally connected with one end of the vertical beam, the lower end of each vibration damping combination is rotationally connected with the swing arm, the upper end of the vertical beam is perpendicular to the cross beam and is fixedly connected with the cross beam, the lower end of the vertical beam is rotationally connected with the swing arm by a rotating shaft, and a castor is arranged at the other end of the swing arm. The bed has the advantages that the vibration damping combinations are used to absorb bed vibration, so as to greatly improve the sleeping quality of users; the vibration damping and the spring stiffness are adjusted so that the bed can meet the requirements of the users for different comfort levels; the vibration damping combinations are used for replacing the rigid bed legs of the traditional bed, and the bed has certain height adaptability; and due to the arrangement of the vibration damping combinations and the castor, the bed has improved remarkably mobility, and is suitable for transferring patients and wounded personnel on various roads.
Description
Technical field
The invention belongs to daily necessities field, be specifically related to a kind of bed with vibration damping combination, raising sleep comfort level.
Background technology
Existing bed comprises bed board, footpost and headpiece, and wherein footpost is generally rigidity, can not absorb vibration, and comfortableness is poor.High-grade bed generally can be laid the inner mattress with a lot of little springs on bed board, but due to temporarily absorbing vibrational energy of spring, also can discharge afterwards, causes bed surface repeatedly to vibrate, and has reduced the comfort level of human body.
In addition,, because the footpost of tradition bed is that the non deformable material of rigidity is made, on uneven ground, can produce indivedual footposts and not paste ground; Existing hospital bed, with castor, is convenient to shift medicine, patient or the wounded, but owing to lacking spring and damping element, makes to be subject to larger impact by the personnel of carrying or medicine.
Summary of the invention
The object of the invention is to propose a kind of bed with vibration damping combination, its vibration that can be subject to bed board effectively absorbs, and improves sleep quality comfort level.
The present invention, for solving the problems of the technologies described above, is achieved through the following technical solutions:
A kind of bed with vibration damping combination, comprise the main frame being formed by crossbeam 1, longeron 7 and bed board 9, also comprise four vibration damping combinations 2, vertical beam 6 and swing arm 3, wherein the upper end of vibration damping combination 2 is rotatably connected with one end of crossbeam 1, the lower end of vibration damping combination 2 is rotatably connected with swing arm 3, vertical beam 6 upper ends are fixedly connected with perpendicular to crossbeam 1 and with it, and vertical beam 6 lower ends are rotatably connected with swing arm 3 by rotating shaft 5, and the other end of swing arm 3 is provided with castor 4.
In the time of bed board 9 forced vibration, swing arm 3 and vertical beam 6 produce relative rotation, and then compression or stretching vibration damping combination 2, and then vibration is absorbed.
A kind of bed with vibration damping combination, comprise the main frame being formed by crossbeam 1, longeron 7 and bed board 9, also comprise two vibration damping combinations 2, oscillating support leg 31 and revolute 51, wherein the first installing hole 311 of left side oscillating support leg 31 is rotatably connected with beam support 11 by revolute 51, the second installing hole 312 of oscillating support leg 31 is rotatably connected with vibration damping combination 2 one end, the other end of vibration damping combination 2 is rotatably connected with the second installing hole 312 of left side oscillating support leg 31, and oscillating support leg 31 lower ends are provided with castor 4.
In the time of bed board 9 forced vibration, oscillating support leg 31 and beam support 11 produce relative rotation, and then compression or stretching vibration damping combination 2, and then vibration is absorbed.In this scheme, two of left and right oscillating support leg 31 shares a vibration damping combination 2, and simple in structure, cost is low.
A kind of bed with vibration damping combination, comprise the main frame being formed by crossbeam 1, longeron 7 and bed board 9, also comprise at least four vibration damping combinations 2 and holder 32, wherein holder 32 is connected with the lower surface of crossbeam 1, the upper end of vibration damping combination 2 is fixedly connected with holder 32, and the lower end of vibration damping combination 2 is provided with castor 4.
In the time of bed board 9 forced vibration, directly vibration is passed to four vibration damping combinations 2 by holder 32, and then compression or stretching vibration damping combination 2, and then vibration is absorbed.In this scheme, vibration damping combination 2 is directly fixedly connected with main frame, and simple in structure, reliability is high, and cost is low.
A kind of bed with vibration damping combination, comprises the main frame being made up of crossbeam 1, longeron 7 and bed board 9, also comprises vibration damping combination 2, fixing vertical beam 61, motor 10 and crank 33; Wherein fixing vertical beam 61 upper ends is connected with crossbeam 1 rotating middle part by the pair 52 that is rotatably connected, fixed cross beam 62 and cant beam 63 are all connected with fixing vertical beam 61, motor 10 is fixed on cant beam 63, motor 10 driving cranks 33 rotate, crank 33 other ends are rotatably connected with one end of vibration damping combination 2, and the other end of vibration damping combination 2 is rotatably connected with crossbeam 1.
This scheme can be used as electronic shaking table, and the motor 10 rear drive crank 33 of switching on rotates, and then pulls main frame to swing by vibration damping combination 2; Meanwhile, vibration damping combination 2 can play buffering and shock preventing effect.In the time not needing electric swinging, can be by locked motor 10, the now stressed swing of bed board 9, will compress or stretching vibration damping combination 2, and then vibration is absorbed.
Alternatively, the vibration damping combination 2 in above-mentioned four kinds of embodiment comprises shock absorber 23 and spring 24, and spring 24 upper ends are undertaken spacing by spring upper limit 22, and spring 24 lower ends are undertaken spacing by spring lower limit 25.
Wherein, spring upper limit 22 is connected with the cylinder barrel of shock absorber 23 by screw thread, by adjusting spring upper limit 22 position on the cylinder barrel of shock absorber 23, can regulating spring 24 reduction lengths, and then regulate its rigidity;
Spring lower limit 25 is fixedly connected with the piston rod of shock absorber 23, the cylinder barrel upper end of shock absorber 23 is provided with upper lift ring 21, the piston rod end of shock absorber 23 is provided with lower lift ring 26, and spring lower limit 25 upper ends are provided with buffer stopper 27, prevents that the cylinder barrel of shock absorber 23 from clashing into spring lower limit 25.
Alternatively, described shock absorber 23 is ride control shock absorber, carries out damping adjusting by damping control valve 28.
Alternatively, described spring 24 is air spring, carries out inflation/deflation by charging valve 29, and the rigidity of spring 24 is regulated.In addition, by the section shape and size of cylinder barrel of design shock absorber 23, can obtain the spring rate of segmentation, reach optimum reelability quality.
Alternatively, the damped coefficient of described shock absorber 23 is relevant to amplitude, and in the time of little amplitude, damped coefficient is little, and in the time of large amplitude, damped coefficient is large.Thereby the comfortableness demand when different weight that adaptation bed board 9 is subject to, different Oscillation Amplitude.
Alternatively, the bed with vibration damping combination described in above-mentioned four kinds of embodiment also comprises the reinforcement grid of headpiece 8 and main frame surrounding etc.
Beneficial effect of the present invention is: the present invention utilizes the vibration of vibration damping combination absorbent bed, has greatly improved people's sleep quality; By damping and spring rate are regulated, can adapt to the requirement of different crowd to comfortableness; Replaced the rigidity footpost of traditional because the present invention utilizes vibration damping combination, had certain high degree of adaptability, even can regulate the height of each footpost according to the uneven degree on ground, therefore the present invention is applicable to more various ground; The present invention, with vibration damping combination and castor, is significantly improved the mobility of bed, and enterprising line position shifts on various road surfaces to be applicable to patient, the wounded.
Brief description of the drawings
Fig. 1 is the first embodiment of the present invention
Fig. 2 is the side view of the first embodiment of the present invention
Fig. 3 is the top view of the first embodiment of the present invention
In figure:
1, crossbeam; 2, vibration damping combination; 3, swing arm; 4, castor; 5, rotating shaft; 6, vertical beam; 7, longeron; 8, headpiece; 9, bed board.
Fig. 4 is a kind of embodiment of the vibration damping combination in the present invention
Fig. 5 is the another kind of embodiment of the vibration damping combination in the present invention
In figure:
21, upper lift ring; 22, spring upper limit; 23, shock absorber; 24, spring; 25, spring lower limit; 26, lower lift ring; 27, buffer stopper; 28, damping control valve; 29, charging valve.
Fig. 6 is the second embodiment of the present invention
Fig. 7 is oscillating support leg 31 in the second embodiment of the present invention and the schematic diagram of castor 4
Fig. 8 is the side view of the second embodiment of the present invention
In figure:
1, crossbeam; 2, vibration damping combination; 31, oscillating support leg; 4, castor; 51, revolute; 7, longeron; 8, headpiece; 9, bed board; 11, beam support; 311, the first installing hole; 312, the second installing hole.
Fig. 9 is the third embodiment of the present invention
Figure 10 is the side view of the third embodiment of the present invention
In figure:
1, crossbeam; 2, vibration damping combination; 32, holder; 4, castor; 7, longeron; 8, headpiece; 9, bed board.
Figure 11 is the fourth embodiment of the present invention
Figure 12 is the side view of the fourth embodiment of the present invention
In figure:
1, crossbeam; 52, the pair that is rotatably connected; 61, fixing vertical beam; 62, fixed cross beam; 63, cant beam; 10, motor; 33, crank; 7, longeron; 8, headpiece; 9, bed board.
Detailed description of the invention
Below in conjunction with accompanying drawing, invention is described in detail.
Shown in Fig. 1 to Fig. 3, be the first embodiment of the present invention, shown a kind of bed with vibration damping combination, comprise the main frame being formed by crossbeam 1, longeron 7 and bed board 9, also comprise four vibration damping combinations 2, vertical beam 6 and swing arm 3, wherein the upper end of vibration damping combination 2 is rotatably connected with one end of crossbeam 1, and the lower end of vibration damping combination 2 is rotatably connected with swing arm 3, and vertical beam 6 upper ends are fixedly connected with perpendicular to crossbeam 1 and with it, vertical beam 6 lower ends are rotatably connected with swing arm 3 by rotating shaft 5, and the other end of swing arm 3 is provided with castor 4.
In the time of bed board 9 forced vibration, swing arm 3 and vertical beam 6 produce relative rotation, and then compression or stretching vibration damping combination 2, and then vibration is absorbed.
Fig. 4 is a kind of embodiment of the vibration damping combination 2 of the first embodiment, and it comprises shock absorber 23 and spring 24, and spring 24 upper ends are undertaken spacing by spring upper limit 22, and spring 24 lower ends are undertaken spacing by spring lower limit 25.
Wherein, spring upper limit 22 is connected with the cylinder barrel of shock absorber 23 by screw thread, by adjusting spring upper limit 22 position on the cylinder barrel of shock absorber 23, can regulating spring 24 reduction lengths, and then regulate its rigidity;
Spring lower limit 25 is fixedly connected with the piston rod of shock absorber 23, the cylinder barrel upper end of shock absorber 23 is provided with upper lift ring 21, the piston rod end of shock absorber 23 is provided with lower lift ring 26, and spring lower limit 25 upper ends are provided with buffer stopper 27, prevents that the cylinder barrel of shock absorber 23 from clashing into spring lower limit 25.
Alternatively, described shock absorber 23 is ride control shock absorber, carries out damping adjusting by damping control valve 28.
Fig. 5 is the another kind of embodiment of the vibration damping combination 2 of the first embodiment, and described spring 24 is not the helical spring in Fig. 4, but is replaced by air spring, carries out inflation/deflation by charging valve 29, and the rigidity of spring 24 is regulated.In addition, by the section shape and size of cylinder barrel of design shock absorber 23, can obtain the spring rate of segmentation, reach optimum reelability quality.
Alternatively, the damped coefficient of described shock absorber 23 is relevant to amplitude, and in the time of little amplitude, damped coefficient is little, and in the time of large amplitude, damped coefficient is large.Thereby the comfortableness demand when different weight that adaptation bed board 9 is subject to, different Oscillation Amplitude.
The technical characterictic of above-mentioned vibration damping combination 2 is equally applicable to following three kinds of embodiment, therefore repeats no more below.
Fig. 6 to Fig. 8 is the second embodiment of the present invention, shown a kind of bed with vibration damping combination, comprise the main frame being formed by crossbeam 1, longeron 7 and bed board 9, also comprise two vibration damping combinations 2, oscillating support leg 31 and revolute 51, wherein the first installing hole 311 of left side oscillating support leg 31 is rotatably connected with beam support 11 by revolute 51, the second installing hole 312 of oscillating support leg 31 is rotatably connected with vibration damping combination 2 one end, the other end of vibration damping combination 2 is rotatably connected with the second installing hole 312 of left side oscillating support leg 31, and oscillating support leg 31 lower ends are provided with castor 4.
In the time of bed board 9 forced vibration, oscillating support leg 31 and beam support 11 produce relative rotation, and then compression or stretching vibration damping combination 2, and then vibration is absorbed.In this scheme, two of left and right oscillating support leg 31 shares a vibration damping combination 2, and simple in structure, cost is low.
Fig. 9 and Figure 10 are the third embodiment of the present invention, shown a kind of bed with vibration damping combination, comprise the main frame being formed by crossbeam 1, longeron 7 and bed board 9, also comprise at least four vibration damping combinations 2 and holder 32, wherein holder 32 is connected with the lower surface of crossbeam 1, the upper end of vibration damping combination 2 is fixedly connected with holder 32, and the lower end of vibration damping combination 2 is provided with castor 4.
In the time of bed board 9 forced vibration, directly vibration is passed to four vibration damping combinations 2 by holder 32, and then compression or stretching vibration damping combination 2, and then vibration is absorbed.In this scheme, vibration damping combination 2 is directly fixedly connected with main frame, and simple in structure, reliability is high, and cost is low.
Figure 11 and Figure 12 are the 4th kind of embodiment of the present invention, and shown a kind of bed with vibration damping combination, comprises the main frame being made up of crossbeam 1, longeron 7 and bed board 9, also comprises vibration damping combination 2, fixing vertical beam 61, motor 10 and crank 33; Wherein fixing vertical beam 61 upper ends is connected with crossbeam 1 rotating middle part by the pair 52 that is rotatably connected, fixed cross beam 62 and cant beam 63 are all connected with fixing vertical beam 61, motor 10 is fixed on cant beam 63, motor 10 driving cranks 33 rotate, crank 33 other ends are rotatably connected with one end of vibration damping combination 2, and the other end of vibration damping combination 2 is rotatably connected with crossbeam 1.
This scheme can be used as electronic shaking table, and the motor 10 rear drive crank 33 of switching on rotates, and then pulls main frame to swing by vibration damping combination 2; Meanwhile, vibration damping combination 2 can play buffering and shock preventing effect.In the time not needing electric swinging, can be by locked motor 10, the now stressed swing of bed board 9, will compress or stretching vibration damping combination 2, and then vibration is absorbed.
Alternatively, the bed with vibration damping combination described in above-mentioned four kinds of embodiment also comprises the reinforcement grid of headpiece 8 and main frame surrounding etc.
Above-described embodiment is only for illustrating the present invention, and wherein structure, the connected mode etc. of each parts all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (10)
1. the bed with vibration damping combination, comprises the main frame being made up of crossbeam (1), longeron (7) and bed board (9), it is characterized in that:
Also comprise four vibration damping combinations (2), vertical beam (6) and swing arm (3), wherein the upper end of vibration damping combination (2) is rotatably connected with one end of crossbeam (1), the lower end of vibration damping combination (2) is rotatably connected with swing arm (3), vertical beam (6) upper end is perpendicular to crossbeam (1) and be fixedly connected with it, vertical beam (6) lower end is rotatably connected with swing arm (3) by rotating shaft (5), and the other end of swing arm (3) is provided with castor (4).
2. a kind of bed with vibration damping combination according to claim 1, is characterized in that:
Described vibration damping combination (2) comprises shock absorber (23) and spring (24), spring (24) upper end is undertaken spacing by spring upper limit (22), spring (24) lower end is undertaken spacing by spring lower limit (25), wherein, spring upper limit (22) is connected with the cylinder barrel of shock absorber (23) by screw thread, spring lower limit (25) is fixedly connected with the piston rod of shock absorber (23), the cylinder barrel upper end of shock absorber (23) is provided with upper lift ring (21), the piston rod end of shock absorber (23) is provided with lower lift ring (26), spring lower limit (25) upper end is provided with buffer stopper (27).
3. a kind of bed with vibration damping combination according to claim 2, is characterized in that:
Described shock absorber (23) is ride control shock absorber, carries out damping adjusting by damping control valve (28).
4. a kind of bed with vibration damping combination according to claim 2, is characterized in that:
Described spring (24) is air spring, carries out inflation/deflation by charging valve (29), and the rigidity of spring (24) is regulated.
5. a kind of bed with vibration damping combination according to claim 2, is characterized in that:
The damped coefficient of described shock absorber (23) is relevant to amplitude, and in the time of little amplitude, damped coefficient is little, and in the time of large amplitude, damped coefficient is large.
6. the bed with vibration damping combination, comprises the main frame being made up of crossbeam (1), longeron (7) and bed board (9), it is characterized in that:
Also comprise two vibration damping combinations (2), oscillating support leg (31) and revolute (51), wherein first installing hole (311) of left side oscillating support leg (31) is rotatably connected with beam support (11) by revolute (51), second installing hole (312) of oscillating support leg (31) is rotatably connected with vibration damping combination (2) one end, the other end of vibration damping combination (2) is rotatably connected with second installing hole (312) of left side oscillating support leg (31), and oscillating support leg (31) lower end is provided with castor (4).
7. a kind of bed with vibration damping combination according to claim 6, is characterized in that:
Described vibration damping combination (2) comprises shock absorber (23) and spring (24), spring (24) upper end is undertaken spacing by spring upper limit (22), spring (24) lower end is undertaken spacing by spring lower limit (25), wherein, spring upper limit (22) is connected with the cylinder barrel of shock absorber (23) by screw thread, spring lower limit (25) is fixedly connected with the piston rod of shock absorber (23), the cylinder barrel upper end of shock absorber (23) is provided with upper lift ring (21), the piston rod end of shock absorber (23) is provided with lower lift ring (26), spring lower limit (25) upper end is provided with buffer stopper (27).
8. the bed with vibration damping combination, comprises the main frame being made up of crossbeam (1), longeron (7) and bed board (9), it is characterized in that:
Also comprise at least four vibration damping combinations (2) and holder (32), wherein holder (32) is connected with the lower surface of crossbeam (1), the upper end of vibration damping combination (2) is fixedly connected with holder (32), and the lower end of vibration damping combination (2) is provided with castor (4).
9. a kind of bed with vibration damping combination according to claim 8, is characterized in that:
Described vibration damping combination (2) comprises shock absorber (23) and spring (24), spring (24) upper end is undertaken spacing by spring upper limit (22), spring (24) lower end is undertaken spacing by spring lower limit (25), wherein, spring upper limit (22) is connected with the cylinder barrel of shock absorber (23) by screw thread, spring lower limit (25) is fixedly connected with the piston rod of shock absorber (23), the cylinder barrel upper end of shock absorber (23) is provided with upper lift ring (21), the piston rod end of shock absorber (23) is provided with lower lift ring (26), spring lower limit (25) upper end is provided with buffer stopper (27).
10. the bed with vibration damping combination, comprises the main frame being made up of crossbeam (1), longeron (7) and bed board (9), it is characterized in that:
Also comprise vibration damping combination (2), fixing vertical beam (61), motor (10) and crank (33);
Wherein fixing vertical beam (61) upper end is connected with crossbeam (1) rotating middle part by the pair that is rotatably connected (52), fixed cross beam (62) and cant beam (63) are all connected with fixing vertical beam (61), motor (10) is fixed on cant beam (63), motor (10) driving crank (33) rotation, crank (33) other end is rotatably connected with one end of vibration damping combination (2), and the other end of vibration damping combination (2) is rotatably connected with crossbeam (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410235154.9A CN104000420A (en) | 2014-05-29 | 2014-05-29 | Bed with vibration damping combinations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410235154.9A CN104000420A (en) | 2014-05-29 | 2014-05-29 | Bed with vibration damping combinations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104000420A true CN104000420A (en) | 2014-08-27 |
Family
ID=51361537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410235154.9A Pending CN104000420A (en) | 2014-05-29 | 2014-05-29 | Bed with vibration damping combinations |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104000420A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895106A (en) * | 2018-06-26 | 2018-11-27 | 蚌埠天河花卉市场开发有限公司 | A kind of elastic force apparatus for using native screening machine for flowers |
| CN114099162A (en) * | 2022-01-26 | 2022-03-01 | 新乡医学院三全学院 | Adjustable vibration damper for medical care bed |
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| CN1457755A (en) * | 2003-01-17 | 2003-11-26 | 李建新 | Recovery physical therapeutic health electric bed and its producing method |
| DE102006037145A1 (en) * | 2006-08-09 | 2008-02-14 | OKIN Gesellschaft für Antriebstechnik mbH | Hospital bed arrangement, has linear drive for varying spacing between bed elevation columns |
| US20080209634A1 (en) * | 2007-03-01 | 2008-09-04 | Stevens G Robert | Comfort glide hospital gurney |
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| KR20130061986A (en) * | 2011-12-02 | 2013-06-12 | 김진일 | Preventing bedsores system for bed runs on electricity |
| CN203532616U (en) * | 2013-08-01 | 2014-04-09 | 台州齐力减震器有限公司 | Rear shock absorber with adjustable elastic force |
| CN103784282A (en) * | 2012-10-29 | 2014-05-14 | 桂裕青 | Shock absorber for rescue bed |
| CN203841394U (en) * | 2014-05-29 | 2014-09-24 | 张玉新 | Bed with vibration reduction assemblies |
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2014
- 2014-05-29 CN CN201410235154.9A patent/CN104000420A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1457755A (en) * | 2003-01-17 | 2003-11-26 | 李建新 | Recovery physical therapeutic health electric bed and its producing method |
| DE102006037145A1 (en) * | 2006-08-09 | 2008-02-14 | OKIN Gesellschaft für Antriebstechnik mbH | Hospital bed arrangement, has linear drive for varying spacing between bed elevation columns |
| US20080209634A1 (en) * | 2007-03-01 | 2008-09-04 | Stevens G Robert | Comfort glide hospital gurney |
| CN101401694A (en) * | 2007-10-01 | 2009-04-08 | 王清林 | Shock absorption temperature controlling bed |
| KR20130061986A (en) * | 2011-12-02 | 2013-06-12 | 김진일 | Preventing bedsores system for bed runs on electricity |
| CN103784282A (en) * | 2012-10-29 | 2014-05-14 | 桂裕青 | Shock absorber for rescue bed |
| CN203532616U (en) * | 2013-08-01 | 2014-04-09 | 台州齐力减震器有限公司 | Rear shock absorber with adjustable elastic force |
| CN203841394U (en) * | 2014-05-29 | 2014-09-24 | 张玉新 | Bed with vibration reduction assemblies |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895106A (en) * | 2018-06-26 | 2018-11-27 | 蚌埠天河花卉市场开发有限公司 | A kind of elastic force apparatus for using native screening machine for flowers |
| CN114099162A (en) * | 2022-01-26 | 2022-03-01 | 新乡医学院三全学院 | Adjustable vibration damper for medical care bed |
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Application publication date: 20140827 |