CN105616104A

CN105616104A - Multifunctional massage sofa

Info

Publication number: CN105616104A
Application number: CN201610139206.1A
Authority: CN
Inventors: 王剑勤
Original assignee: Ningbo Shilin Arts & Crafts Co ltd
Current assignee: Ningbo Binghang Technology Group Co ltd
Priority date: 2016-03-11
Filing date: 2016-03-11
Publication date: 2016-06-01
Anticipated expiration: 2036-03-11
Also published as: CN105616104B

Abstract

The invention provides a multifunctional massage sofa which comprises a base framework, a leg hinged to the front end of the base framework and a backrest located over the back end of the base framework; the two sides of the leg are hinged to the base framework through hinge bars respectively, and each hinge bar comprises two segments which are connected with each other in a certain angle, wherein the connection portion between the two segments is hinged to the two sides of the front end of the base framework, the first segment of the two segments extends from the two sides of the leg, the end of the first segment is hinged to the side face of the leg, and the second segment extends by steering away from the leg from the side face and is connected to a driving device.According to the multifunctional massage sofa, the structure is compact and reasonable, a connecting bar mechanism and a driving mechanism are small in size and stable to drive, and rotatable adjustment and folding storage of the leg and the backrest can be achieved; in addition, due to the fact that the driving and connecting bar mechanisms are simple in structure and reasonable in arrangement, the appearance of a common sofa can be adopted, the overall size is small, the appearance is attractive, and the multifunctional massage sofa is better suitable for being used by common families.

Description

A kind of multifunctional massage sofa

Technical field

The present invention relates to a kind of Massage sofa.

Background technology

Along with people are to the pursuit of quality of the life, to the attention of therapeutic massage, massage equipment and massage effect be it is also proposed higher requirement. existing massage chair, owing to having more massage apparatus and bar-link drive, therefore, profile is all heavier, all some is incompatible with the decoration style of general family, it is placed in average family and uses, very obvious is not again very harmonious, if and the profile adopting the sofa of family makes massage chair, just volume and the structure of its drives structure and massage mechanism is had higher requirement, therefore, prior art also not occurring, overall volume is less, compact construction and have multiple massage effect concurrently, the massage chair close with normal domestic use sofa volume and shape.

And general family expenses sofa, only there is good profile usually, seldom have and there is message structure, therefore, also occur some function sofas, the basis of existing family expenses sofa installs additional some massage apparatuses, but such massage apparatus is usually fairly simple, massage effect is also very limited. Because these function sofas need to consider and the Harmony of overall house ornamentation, therefore, too many massage mechanism can not be set, particularly leg, leg massaging machine structure is a kind of structure that volume ratio is bigger, so existing Massage sofa, a kind of multifunctional office sofa as disclosed in Chinese patent CN104026901A, is not much all provided with leg massaging machine structure.

Also there is the Massage sofa that some have leg massaging machine structure, such as a kind of massage sofa rack disclosed in Chinese patent CN103735075A, comprise pedestal, seat board and backrest, seat board frame and pedestal are slidably connected, pin case also it is provided with in seat board frame, pin case is provided with the mechanism massaged by leg, but stretch out to realize pin case and retract in seat board frame, pin case is connected to drive unit by fork and expansion link, and driven by drive unit and stretch out in seat board frame and retract in seat board frame, although achieving and arranging leg massaging machine structure at Massage sofa and be make leg massaging machine structure to shrink to be positioned at seat board frame, make overall volume less, but in order to realize the flexible of pin case, must have gap between pin case both sides and seat board frame makes fork to move, therefore after pin case is retracted, between this pin case and seat board frame of Massage sofa, there is bigger gap, that is the outward appearance of this Massage sofa still profile with common sofa there is bigger discrepancy, overall outward appearance is not very attractive in appearance, bigger difference is had with common family expenses sofa, and the house decoration style with entirety is not coordinate very much, cause human consumer still beyond affordability.

In addition, the one " foot-treadle device " as disclosed in Chinese patent ZL03818674.8 comprises the supporting parts of pair of right and left, foot board, and posture changing mechanism, and wherein, supporting parts are outstanding from chair portion to front, foot board around transverse axis rotatably pivot prop up between these supporting parts, one side there is lower limb massage portion, another side has the lower limb loading end that can carry lower limb, between above-mentioned supporting parts and foot board, posture changing mechanism can change the posture of foot board between above-mentioned lower limb massage portion massage posture forward and above-mentioned lower limb loading end rest posture forward. this foot-treadle device has two sides and has multiple function and do not have and can shrink and be positioned at chair, but supporting parts are set due to the both sides of foot board and posture changing mechanism has certain volume, if the both sides of chair do not have side plate, these supporting parts are regardless of the outside what state to be all exposed to chair in, not only outward appearance is attractive in appearance not, and, decoration style with family is not coordinate very much yet. if chair has side plate, and in order to enable foot board stretch out in chair or retraction chair, and foot board is wanted to overturn between two sides, so, gap must be had for supporting parts and posture changing mechanism motion between these foot board and both sides of chair, therefore, also bigger gap can be had between the both sides of foot board and chair, if the arranged outside at foot board can block the blocking parts in this gap, can be affected when the rotation of foot board changes posture again, therefore, gap between foot board and chair is inherently exposed, the profile with the Massage sofa of this foot-treadle device is made also to differ bigger with common sofa, outward appearance is attractive in appearance not, it is not easy to combine together with house decoration.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of compact construction, rationally, it is possible to be suitable for being designed to the multifunctional massage sofa of normal domestic use sofa profile.

The present invention solves the problems of the technologies described above the technical scheme adopted: a kind of multifunctional massage sofa, comprise bedframe, it is articulated with the leg of bedframe front end and it is positioned at the backrest above the rear end of described bedframe, described leg can rotate around the first hinge that itself and bedframe are hinged, it is provided with in described bedframe and drives described leg to rotate to stretch out in outside described bedframe or retract around described first hinge and be positioned at the drive unit of bedframe, it is characterized in that: the both sides of described leg are hinged to described bedframe by hinged bar respectively, described hinged bar comprises and being interconnected and at an angle two sections, link position and the both sides, front end of bedframe between these two sections are hinged, line between the articulated position of the both sides of hinged bar and bedframe is described first hinge, first paragraph in described two sections extends in the both sides of leg and the side of its end and leg is hinged, in described two sections the 2nd section gets around the extension of described leg and is connected to described drive unit from side.

In order to overall volume less and have multiple function for user select, line between the articulated position of the both sides of described hinged bar and leg is the 2nd hinge, described leg has the towards the opposite and first surface that extends in the same way with the width of bedframe and the 2nd, described 2nd hinge is between described first surface and the 2nd, described leg can around the 2nd hinge rotate so that switching first surface and the 2nd respectively to upper setting, described first surface is for shelving the leg of user, and described 2nd is provided with massage mechanism.

In order to make the outward appearance of multifunctional massage sofa more attractive in appearance, described first surface has the dual-side edge of the both sides protruding from described leg, described dual-side is along toward the outer side and blocking described hinged bar when leg shrinks and is positioned at bedframe at first surface, and the gap of accommodating described hinged bar between described leg both sides and bedframe.

In order to make the rotation of described leg have spacing effect, described 2nd hinge near described first surface, described dual-side along can first surface upwards time be held on the described first paragraph of described hinged bar.

In order to make, overall volume is little, drive efficiency is higher, described drive unit comprises the driving source being fixed in bedframe, the flexible motion of the output shaft in described driving source and arrange towards leg, the end of described output shaft is hinged to first connecting rod, the bottom of described first connecting rod is hinged to described bedframe, the top of first connecting rod is hinged to described hinged bar by third connecting rod, and the position that described driving source drives described first connecting rod hinged around its bottom and bedframe is rotated.

In order to make user feel more comfortable, described backrest is hinged to be positioned at above bedframe rear end, and described backrest can rotate under the driving of described drive unit before and after the position that itself and bedframe are hinged.

In order to make structure more simplify, drive unit drives leg and backrest to rotate simultaneously, described first connecting rod is hinged to one end of second connecting rod, the other end of described second connecting rod is extended backward and is hinged to one end of the union lever laying respectively at backrest both sides by hinged quarter butt, the other end of described union lever is fixedly connected with the side of described backrest, the middle portion interval of described union lever is hinged with the first quarter butt and one end of the 2nd quarter butt, and the other end of described first quarter butt and the 2nd quarter butt is hinged to described bedframe.

In order to make massage effect better, described backrest is provided with waist masaging device.

In order to increase the comfort that user takes a seat on Massage sofa, described waist masaging device is provided with waist air bag towards the outside of human body, described waist air bag is in inflation state when waist masaging device does not work, and when waist masaging device works, this waist air bag is in deflation status.

Rotate for the ease of leg, described leg comprises housing and is positioned at the close described first surface of housing and is positioned at the rotating shaft that the intermediate lateral of first surface is arranged, the two ends of described rotating shaft stretch out in described housing and are fixedly connected with described hinged bar, it is provided with drive-motor in described housing, described drive-motor is fixedly connected with described housing by support, the output shaft of described drive-motor drives described rotating shaft around the axial rotation of himself, and the axis of this rotating shaft is described 2nd hinge.

Compared with prior art, it is an advantage of the current invention that this multifunctional massage sofa, not only compact construction, rationally, linkage assembly and driving mechanism volume are little, drive stable, can realizing leg and backrest rotation adjustment and fold storage, and drive the structure with linkage assembly simply due to it, it is reasonable to arrange, the profile of common sofa can be adopted, overall volume is also less, appearance looks elegant, is more suitable for average family and uses.

Accompanying drawing explanation

Fig. 1 is the schematic perspective view (leg and backrest launch state and leg first surface upwards) of the multifunctional massage sofa of the embodiment of the present invention.

Fig. 2 is the schematic perspective view (leg and backrest launch state and leg the 2nd towards upper) of the other direction of the multifunction sofa of the embodiment of the present invention.

Fig. 3 is the schematic perspective view (leg and backrest contraction schedule) of the other direction of the multifunction sofa of the embodiment of the present invention.

Fig. 4 is the schematic perspective view of leg.

Fig. 5 is the schematic diagram of line A-A along Fig. 4.

Embodiment

Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.

As Figure 1-5, the multifunctional massage sofa of the embodiment of the present invention, comprises bedframe 1, is positioned at the leg 2 of bedframe 1 front end, to be namely positioned at the backrest 3 above bedframe 1 rear end. This bedframe 1, backrest 3 and leg 2 can arrange massage mechanism respectively, and the outside of bedframe 1, backrest 2 and leg 2 can be provided with the back cushion of sponge, cushion, air bag etc.

Described bedframe 1 hollow, described leg 2 is articulated with the front end of bedframe 1, and can rotate relative to bedframe 1 under the driving of leg drive unit and stretch out the different heights being positioned at bedframe 1 front end, this leg 2 is hinged with bedframe 1 by hinged bar 21, and leg 2 can rotate around the position that hinged bar 21 and bedframe 1 are hinged, hinged bar 21 is for being positioned at each one of leg 2 both sides, and hinged bar 21 is hinged with the both sides above the front end of bedframe 1, line between the pin joint of the both sides of the front end of this hinged bar 21 and bedframe 1 forms the first hinge 211, this hinged bar 21 drives leg 2 to rotate around this first hinge 211 simultaneously. and hinged bar 21 is also hinged with the both sides of leg 2, and the 2nd hinge 212 that the line of the pin joint that leg 2 can be hinged around its both sides and hinged bar 21 is formed rotates. the leg drive unit being positioned at bedframe 1, drives this leg 2 to rotate around the first hinge 211 with hinged bar 21. this leg 2 comprises towards that be oppositely arranged and the first surface 22 that extends in the same way with the width of bedframe 1 and the 2nd face 23, first surface 22 is for shelving leg, 2nd face 23 is provided with massage mechanism, leg can be massaged, this leg 2 can rotate around the 2nd hinge 212 that itself and hinged bar 21 are hinged, so make first surface 22 upwards or the 2nd face 23 upwards. 2nd hinge 212 is between this first surface 22 and the 2nd face 23 and arranges near described first surface 22.

This backrest 3 is hinged with the both sides, rear end of bedframe 1, and can rotate around the hinge that itself and bedframe 1 are hinged under the driving of backrest drive unit, the both sides of backrest 3 are respectively equipped with the union lever 31 of extension downwards, one end and the backrest 3 of this union lever 31 are fixed mutually, and the both sides, rear end of the other end and bedframe 1 are hinged. And can swing before and after the position that union lever 31 and bedframe 1 are hinged. This backrest drive unit is also located in bedframe 1.

This leg drive unit and backrest drive unit can be that two separately overlap separate drive unit, it is also possible to be interconnective a set of drive unit, in embodiments of the invention, be namely that a set of drive unit drives leg 2 and backrest 3 to move simultaneously. This drive unit comprises driving source 41, this driving source 41 is a cylinder or electric pushrod, it is fixed in bedframe 1, its output shaft 42 can stretch motion, and arrange towards leg 2, the end of the output shaft 42 in driving source 41 is hinged to a first connecting rod 51, and the bottom-hinged of this first connecting rod 51 is to the bottom of bedframe 1, and the top of first connecting rod 51 is hinged to described hinged bar 21 by third connecting rod 53. Therefore, the drive shaft 42 in driving source 41 flexible can drive this first connecting rod 51 around its position rotation with the bottom-hinged of bedframe 1, and then make first connecting rod 51 drive this hinged bar 21 to rotate around the first hinged hinge 211 of itself and bedframe 1, and then promote expansion and the withdrawal of leg 2, namely promote leg 2 to rotate retraction around the first hinge 211 to be positioned at below the front end of bedframe 1, or launch to be positioned at the top position, front end of bedframe 1. This first connecting rod 51 is one " H " shape connecting rod, " H " shape comprises two and is parallel to each other and mutually fixing connecting rod, and these two parallel connecting rods lay respectively at the both sides of bedframe 1, bottom and the bedframe 1 of these two parallel connecting rods are hinged, and the top of two parallel connecting rods and the hinged bar 21 of leg 2 both sides are hinged respectively.

As shown in Figure 1, 2, this hinged bar 21 is one " V " shape connecting rod, namely comprise and being interconnected and at an angle two sections, these two sections can be two sections of one-body molded mutual bending, can also be that separately two shaping parts are mutually permanently connected, link position between these two sections and hinged above the front end of bedframe 1, line between the articulated position of the both sides of this hinged bar 21 and bedframe 1 is the first hinge 211, the end of the first paragraph 201 being positioned at top of two sections and the both sides of leg 2 are hinged, are the 2nd hinge 212. Two sections of this hinged bar 21, the first paragraph 201 of top is positioned at the side of leg 2, the 2nd section 202 of lower section gets around this leg 2 from side, namely from the side of this Massage sofa, should not overlap with leg 2 for 2nd section 202, and when leg 2 rotates around the 2nd hinge 212, the 2nd end 202 does not affect the rotation of this leg 2 all the time, and the end of the 2nd section 202 below this is connected to described third connecting rod 53. Hinged the 2nd hinge 212 of this hinged bar 21 and leg 2 is near this first surface 22, and it is positioned at the mid-way of the length direction of leg 2, therefore, the 2nd section of this hinged bar 21 should with the 2nd face 23 mating shapes and be positioned at outside the 2nd face 23, the 2nd face 23 that gets around is arranged.

This leg 2 can rotate around the 2nd hinge 212, first surface 22 and the 2nd face 23 are switched upwards mutually, therefore, this first surface 22 has the dual-side of the both sides protruding from leg 2 along 221, the sponge pad that width dimensions is greater than the body of leg 2 such as can be set on first surface 22, therefore, when leg 2 shrinks, can be that first surface 22 plane is outside, and the 2nd face 23 has massage mechanism and can shrink and be positioned at bedframe 1, and this first surface 22 has the dual-side of the side protruding from leg 2 along 221, this dual-side blocks the hinged bar 21 of leg 2 both sides along 221, also can cover the gap of accommodating described hinged bar 21 between this leg 2 both sides and bedframe 1, make outward appearance more attractive in appearance.

And when the dual-side that first surface 22 has a side protruding from leg 2 is along 221, when upwards upwards switching to the 2nd face 23 from this first surface 22, this leg 2, when the 2nd hinge 212 rotates, can only the counter clockwise direction in Fig. 1 rotate, as shown in the direction of arrow in Fig. 1. When upwards upwards switching to first surface 22 from the 2nd face 23, leg 2 can only clockwise direction in Fig. 1 rotate, namely due to the existence along 221 of the dual-side of first surface 22, and the rotation angle of this leg 2 only 180 degree. When first surface 22 upwards time, the dual-side of this first surface is just butted on the first paragraph 201 of described hinged bar 21 along the lower section of 221, plays the effect of rotary spacing.

Described first connecting rod 51 is also hinged with one end of second connecting rod 52, the other end of this second connecting rod 52 extends and the union lever 31 that is hinged on backrest 3 by hinged quarter butt 54 backward, this second connecting rod 52 can respectively be provided with one for both sides, and one end of second connecting rod 52 is hinged to the position of the middle quarter butt of " H " shape of first connecting rod 51, i.e. the position of horizontally disposed middle quarter butt. Mid-way on this union lever 31, also interval is hinged with the first quarter butt 55 and one end of the 2nd quarter butt 56, and the other end of this first quarter butt 55 and the 2nd quarter butt 56 is hinged to the both sides of this bedframe 1. Therefore, when driving source 41 drives this first connecting rod 51 to rotate, drive this second connecting rod 52 to rotate, and then drive this union lever 31 to rotate, this union lever 31 is rotated under the effect of the first quarter butt 55 and the 2nd quarter butt 56 so that backrest 3 is more level and smooth relative to the track that bedframe 1 rotates. And at backrest 3 on the position of human body waist, waist masaging device 6 is set, the waist of human body is massaged. And this waist masaging device 6 is towards the outside of human body, namely relative to the outside of backrest 3, it is provided with waist air bag 8, as shown in Figure 1, this waist air bag 8 can be in inflation state when waist masaging device 6 does not work, make to feel more comfortable by user thereon, and this waist air bag 8 can be in deflation status when waist masaging device 6 works so that more the fit waist of user of waist masaging device 6 is massaged.

As shown in Figure 4,5, it is the schematic perspective view (removing the surface of first surface 22) of this leg 2, and its sectional view. this leg 2 can rotate around the 2nd hinge 212, and the 2nd hinge 212 of this leg 2 is near this first surface 22, and the intermediate lateral being positioned at first surface 22 is arranged. the position of the 2nd hinge 212 is provided with a rotating shaft 71, namely described rotating shaft 71 is positioned at the intermediate lateral setting that housing 72 is positioned at first surface 22 near described first surface 22, the two ends of this rotating shaft 71 are the 2nd hinge 212, and the two ends of this rotating shaft 71 stretch out in this leg 2 and are fixedly connected with the hinged bar 21 of both sides respectively. this leg 2 also comprises the drive-motor 73 being positioned at housing 72, the output shaft rotation of this drive-motor 73 exports, and its output shaft and this rotating shaft 71 are interconnected and drive this rotating shaft 71 to rotate, this drive-motor 73 is fixedly connected with housing 72 by a support 74, when this drive-motor 73 drive shaft 71 is rotated, owing to two ends and the hinged bar 21 of rotating shaft 71 is fixed, therefore, namely this drive-motor 73 drives support 74 and housing 72 to rotate around this rotating shaft 71, leg 2 can be realized rotate around the 2nd hinge 212, realize the switching between the first surface 22 of this leg 2 and the 2nd face 23. 2nd hinge 212 is the central shaft of this rotating shaft 71. above-mentioned rotating shaft 71, drive-motor 73 and support 74 are the drive unit being positioned at leg 2, drive this leg 2 around the rotation of the 2nd hinge 212, it is also possible to not to be provided with these drive units, only leg 2 can also be driven around the rotation of the 2nd hinge 212 by manpower. this drive-motor 73 is worm gear worm screw motor.

This multifunctional massage sofa, not only compact construction, rationally, linkage assembly and driving mechanism volume are little, drive stable, it is possible to realize leg and backrest rotation adjustment and fold storage, and drive with the structure of linkage assembly simple due to it, arrange rationally, it is possible to adopting the profile of common sofa, overall volume is also less, appearance looks elegant, is more suitable for average family and uses.

Although more than describe in detail the preferred embodiments of the present invention, it should be appreciated that ground is understood, for a person skilled in the art, the present invention can have various modifications and variations. All do within the spirit and principles in the present invention any amendment, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a multifunctional massage sofa, comprise bedframe (1), it is articulated with the leg (2) of bedframe (1) front end and it is positioned at the backrest above the rear end of described bedframe (1) (3), described leg (2) can rotate around the first hinge (211) that itself and bedframe (1) are hinged, it is provided with in described bedframe (1) and drives described leg (2) to rotate around described first hinge (211) to stretch out in described bedframe (1) outside or retract and be positioned at the drive unit of bedframe (1), it is characterized in that: the both sides of described leg (2) are hinged to described bedframe (1) by hinged bar (21) respectively, described hinged bar (21) comprises and being interconnected and at an angle two sections, link position and the both sides, front end of bedframe (1) between these two sections are hinged, line between the articulated position of the both sides of hinged bar (21) and bedframe (1) is described first hinge (211), first paragraph (201) in described two sections extends in the both sides of leg (2) and the side of its end and leg (2) is hinged, the 2nd section (202) in described two sections get around described leg (2) extension and are connected to described drive unit from side.

2. multifunctional massage sofa as claimed in claim 1, it is characterized in that: the line between the articulated position of the both sides of described hinged bar (21) and leg (2) is the 2nd hinge (212), described leg (2) has towards the opposite and the first surface (22) that extends in the same way with the width of bedframe (1) and the 2nd (23), described 2nd hinge (212) is positioned between described first surface (22) and the 2nd (23), described leg (2) can rotate around the 2nd hinge (212) and then switch first surface (22) and the 2nd (23) respectively to upper setting, described first surface (22) is for shelving the leg of user, described 2nd (23) are provided with massage mechanism.

3. multifunctional massage sofa as claimed in claim 2, it is characterized in that: described first surface (22) has the dual-side protruding from described leg (2) both sides along (221), described dual-side toward the outer side and can block described hinged bar (21) when leg (2) shrinks and is positioned at bedframe (1) at first surface (22) along (221), and the gap of accommodating described hinged bar (21) between described leg (2) both sides and bedframe (1).

4. multifunctional massage sofa as claimed in claim 3, it is characterized in that: described 2nd hinge (212) near described first surface (22), described dual-side along (221) can first surface (22) upwards time be held on the described first paragraph (201) of described hinged bar (21).

5. multifunctional massage sofa as according to any one of claim 1-4, it is characterized in that: described drive unit comprises the driving source (41) being fixed in bedframe (1), the flexible motion of the output shaft (42) of described driving source (41) and arrange towards leg (2), the end of described output shaft (42) is hinged to first connecting rod (51), the bottom of described first connecting rod (51) is hinged to described bedframe (1), the top of first connecting rod (51) is hinged to described hinged bar (21) by third connecting rod (53), the position that described driving source (41) drives described first connecting rod (51) hinged around its bottom and bedframe (1) is rotated.

6. multifunctional massage sofa as claimed in claim 5, it is characterized in that: described backrest (3) is hinged to be positioned at above bedframe (1) rear end, and described backrest (3) can rotate under the driving of described drive unit before and after the position that itself and bedframe (1) are hinged.

7. multifunctional massage sofa as claimed in claim 6, it is characterized in that: described first connecting rod (51) is hinged to one end of second connecting rod (52), the other end of described second connecting rod (52) is extended backward and is hinged to one end of the union lever (31) laying respectively at backrest (3) both sides by hinged quarter butt (54), the other end of described union lever (31) is fixedly connected with the side of described backrest (3), the middle portion interval handing-over of described union lever (31) has the first quarter butt (55) and one end of the 2nd quarter butt (56), the other end of described first quarter butt (55) and the 2nd quarter butt (56) is hinged to described bedframe (1).

8. multifunctional massage sofa as claimed in claims 6 or 7, it is characterised in that: described backrest (3) is provided with waist masaging device (6).

9. multifunctional massage sofa as claimed in claim 8, it is characterized in that: described waist masaging device (6) is provided with waist air bag (8) towards the outside of human body, described waist air bag (8) is in inflation state when waist masaging device (6) does not work, and when waist masaging device (6) works, this waist air bag (8) is in deflation status.

10. multifunctional massage sofa as according to any one of claim 2-4, it is characterized in that: described leg (2) comprises housing (72) and is positioned at the close described first surface (22) of housing (72) and is positioned at the rotating shaft (71) that the intermediate lateral of first surface (22) is arranged, the two ends of described rotating shaft (71) stretch out in described housing (72) and are fixedly connected with described hinged bar (21), drive-motor (73) it is provided with in described housing (72), described drive-motor (73) is fixedly connected with described housing (72) by support (74), the output shaft of described drive-motor (73) drives described rotating shaft (71) around the axial rotation of himself, the axis of this rotating shaft (71) is described 2nd hinge (212).