CN101121208A

CN101121208A - Curve saw

Info

Publication number: CN101121208A
Application number: CN 200710126769
Authority: CN
Inventors: 张士松; 李祥庆
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2006-06-19
Filing date: 2007-06-18
Publication date: 2008-02-13
Anticipated expiration: 2027-06-18
Also published as: CN101121208B

Abstract

The present invention discloses a turning saw equipped with a rotating handle comprising a saw blade used for processing workpiece and a motor used for driving the saw blade; the motor is equipped in a first shell to transmit the energy from the motor to a drive gear of the saw blade; the drive gear is equipped in a second shell to move the handle which makes the turning saw move relative to the workpeice; the handle is supported on the first or second shell and the handle can at least rotate around one of the first and second shells. The turning saw has a comparatively small volume and can ensure a certain processing precision when the turning saw is used to saw in an inclined way.

Description

Sweep-saw

Technical field

The present invention relates to a kind of sweep-saw, especially relate to a kind of sweep-saw with rotary handle.

Background technology

In the existing sweep-saw, handle normally is fixed on the fuselage.(as oblique saw) in use, handle can be in company with fuselage oblique secundly together, and the operator then holds tiltedly inclined to one side lever operated.Like this, the operator just must firmly put on the handle, and makes handle continue down deflection, changes to avoid the saw blade angle, influences performance accuracy.

In order to address this problem, Japanese Laid-Open Patent Application JP7-171802 has disclosed a kind of sweep-saw, and this sweep-saw comprises body, base.This sweep-saw workpiece of can cutting sth. askew, fixing thereby body rotates with respect to base when cutting sth. askew, handle can be that axis of rotation returns back to vertical position or other ideal positions arbitrarily with the body simultaneously.But, thereby the sweep-saw handle that this piece patent application is disclosed need be crossed over whole body connection thereon, and this body comprises electric machine casing and gear mechanism housing.This connected mode makes the horizontal length of handle be greater than the length summation of electric machine casing and gear mechanism housing along continuous straight runs, and therefore this decreased food can be long.Will cross over gear mechanism housing because of handle simultaneously, and gear mechanism housing is often than higher, so the height of handle also can be than higher.As can be seen, the whole volume of sweep-saw that disclosed of this piece patent application all can be bigger.Two ends owing to handle are connected on the body by bolt nut structure in addition.This connected mode is not very reliable, and operates, and need unclamp nut earlier, turning handle, and then hold-down nut, operating process more complicated.

Summary of the invention

Technical problem to be solved by this invention provides a kind of simple and compact for structure, the sweep-saw with rotary handle that volume is less.

The technical problem that the present invention further will solve provides a kind of sweep-saw that preferable accuracy can be provided when cutting sth. askew.

The technical problem that the present invention further will solve provides a kind of stable operation, connects the sweep-saw that has rotary handle reliably.

The technical problem that the present invention further will solve again provides a kind of sweep-saw with rotary handle, and this rotary handle can be fixed to ideal position fast.

For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of sweep-saw comprises: saw blade; First housing contains motor in described first housing, and described motor has rotation X; Second housing contains transmission device in described second housing, and described transmission device is delivered to saw blade with energy from motor, and described second housing is connected on first housing; Handle, described handle move described sweep-saw makes it with respect to workpiece motion s; Described handle is supported on described first housing or second housing, and described handle at least can be with respect to a rotation in described first housing or second housing.

In such scheme, because handle only is supported on first housing, do not need to cross over second housing, second housing is accommodated transmission device, and often volume ratio is bigger, if handle will be crossed over second housing, just need higher height and long length, handle of the present invention only is supported on first housing, and length is relative with volume all less, thereby make sweep-saw compact conformation of the present invention, cumulative volume is less.

In the rotary handle sweep-saw provided by the invention, handle can also be arranged on second housing, and this handle has two ends, and an end is connected on second housing, and the other end then is a free end.And, also having locking device on the handle, this locking device comprises the action bars with cam surface.

Rotary handle sweep-saw provided by the invention comprises that also coupling apparatus is used for handle is connected with first housing, this coupling apparatus comprises first joint sleeve and second joint sleeve, this first and second joint sleeve can be to tightly fit on first housing, also can be and the one-body molded setting of first housing.Described first joint sleeve is provided with some draw-in grooves, described handle mating part is provided with projection, by protruding the cooperation making handle be fixed in arbitrary ideal position with arbitrary draw-in groove, be connected with flexible member on described second joint sleeve, this flexible member can be so that projection be immobilizated in the draw-in groove reliably, by compression elastic element, can so that the projection in draw-in groove, throw off, thereby make handle rotatable.

As improvement, among the present invention to this technical scheme:

The horizontal length of described handle is less than the horizontal length of described first housing.

Described handle is around rotation X or be parallel to the axis Y rotation of rotation X.

Described handle and described first housing are the integral type setting, thereby jointly with respect to described second housing rotation.

Described handle connects by a jockey and described first housing, and described handle is rotated with respect to described first housing.

Described handle comprises grip part and the mating part that is connected with described first housing.

Described grip part is D shape or L shaped structure.

Described mating part is arc, and mating part inner surface and first housing outer surface to small part are complementary.

Described jockey is provided with locking device makes handle to fix with respect to first housing.

Described jockey comprises that first joint sleeve that is installed on contiguous second housing on first housing reaches second joint sleeve away from second housing, the mating part of described handle is the cavity cylinder, its inner surface matches with the outer surface of described first and second joint sleeve, and can make handle with respect to described first and second joint sleeve motion.

Described first joint sleeve and second joint sleeve difference integral molding are on described first housing.

Described first joint sleeve and second joint sleeve and first housing are split type setting.

Described locking mechanism comprises some draw-in grooves of being located on first joint sleeve, is located at the projection of described cavity cylindrical inner surface, described projection cooperate with draw-in groove can so that handle fix with respect to described first housing.

The cylindrical inner surface of described cavity is provided with flange, an end of contiguous first joint sleeve is connected with the collar on described second joint sleeve, one side of the described collar is near described flange, opposite side is against there being a flexible member, and described flexible member is between the described collar and described second joint sleeve.

Described motor is motor or air motor.

Described first housing comprises first terminal and second end, and described second housing is connected on first end; Described handle has grip part and the annular element that is connected on the grip part; Described sweep-saw also comprises a coupling apparatus, and described handle is connected on first end of described first housing by coupling apparatus, and can be around an axis Y with respect to first housing and the rotation of second housing.

Described axis Y is parallel to described rotation X.

Described first housing is formed by two semi-handle combination of components.

Described coupling apparatus comprises locking device, and described locking device is locked in handle on the position of rotation with respect to axis Y.

Described locking device comprises the action bars with cam surface.

For realizing purpose of the present invention, the present invention also provides a kind of sweep-saw, comprising: saw blade; First housing contains motor in described first housing, and described motor has rotation X; Second housing contains transmission device in described second housing, and described transmission device is delivered to saw blade with energy from motor, and described second housing is connected on first housing; Handle, described handle move described sweep-saw makes it with respect to workpiece motion s, and described handle has first end and second end; Described handle is supported on described first housing, and described handle at least can be with respect to a rotation in described first housing or second housing.

For realizing purpose of the present invention, the present invention also provides a kind of sweep-saw, comprising: saw blade; First housing contains motor in described first housing, and described motor has rotation X; Second housing contains transmission device in described second housing, and described transmission device is delivered to saw blade with energy from motor, and described second housing is connected on first housing; Handle, described handle move described sweep-saw makes it with respect to workpiece motion s; First end of described handle is supported on described second housing, and second end is a free end, and described handle at least can be with respect to a rotation in described first housing or second housing.

The employing of such scheme makes handle rotation and fixing all more convenient can be fixed to ideal position fast.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the three-dimensional assembly diagram of disclosed sweep-saw;

Fig. 2 is the internal structure schematic diagram of disclosed sweep-saw;

Fig. 3 is the three-dimensional exploded view of disclosed sweep-saw;

Fig. 4 is the part-structure exploded view of the sweep-saw that Fig. 3 disclosed;

Fig. 5 is a kind of working state figure of disclosed sweep-saw;

Fig. 6 is another working state figure of disclosed sweep-saw;

Fig. 7 is the schematic diagram of another embodiment of disclosed sweep-saw;

Fig. 8 is a kind of working state figure of the sweep-saw that disclosed among Fig. 7;

Fig. 9 is the another kind of working state figure of the sweep-saw that disclosed among Fig. 7.

Figure 10 is the schematic diagram of the 3rd embodiment of disclosed sweep-saw;

Figure 11 is the phantom of the sweep-saw that disclosed among Figure 10;

Figure 12 is the A-A zoomed-in view among Figure 11.

The specific embodiment

Referring to Fig. 1 to Fig. 3, disclosed the first embodiment of the present invention.A kind of sweep-saw 100 comprises: saw blade 1 straight down is used for cut workpiece; Have the motor 2 of rotation X, be used to drive saw blade 1, and this motor 2 connects power supply by a cable 16; Transmission device 3 is used for energy is passed to saw blade 1 from motor 2; First housing 4 is used to accommodate motor 2; Second housing 5 is used to accommodate transmission device 3; Handle 6; Jockey 7; Base plate 11 is used for being supported on sweep-saw on the workpiece and support 12,18.Need to prove that the motor 2 here is not restricted to electro-motor, can also adopt air motor.

Handle 6 rotatably is connected on first housing 4 by jockey 7, and handle 6 is around rotation X or be basically parallel to the axis Y rotation of axis X.Base plate 11 supports first housing 4 and second housing 5 by

support

12,18, and wherein, support 12 is fixedlyed connected with

first housing

4, and 18 on support and base plate 11 pivots flexibly connect.By

support

12,18, sweep-saw 100 can tilt and be fixed in axis Z with respect to base plate 11 is on the position of rotating shaft.

Handle 6 comprises grip part 611 that roughly is D shape and the mating part 612 that is connected with first housing 4.In the present embodiment, handle 6 is split type setting, comprises left semi-handle 61 and the corresponding right semi-handle 62 that connects with it.This left side semi-handle 61 and right semi-handle 62 can connect together by buckle structure 17.Certainly, handle 6 also can be the monoblock type setting, and promptly left semi-handle and right semi-handle are one-body molded.Grip part 611 is provided with switch 60, and this switch 60 can be connected motor 2 with power supply.The below of mating part 612 and close second housing 5 are formed with opening, and the length of this opening along continuous straight runs is slightly larger than the horizontal length of

support

12,18, and circumferentially roughly are 90 degree along left and right sides semi-handle.The purpose of offering opening herein is in order to get out of the way support 12,18, and promptly when handle 6 rotations, the front end of mating part 612 can not produce with

support

12,18 interferes.On the 612 front end inner surfaces of mating part symmetry be provided with projection 613,612 inner surface rear end is provided with the flange 614 that inwardly stretches out of circle along the mating part.In the present embodiment, the maximum length of handle 6 along continuous straight runs is less than the length of the first housing along continuous straight runs, and the inner ring of grip part 611 is a little less than second housing 5.

With reference to Fig. 4, jockey 7 comprises first joint sleeve, 71, the second joint sleeves 72, is arranged on the collar 73 and two springs 74 between first joint sleeve 71 and second joint sleeve 72.The outside diameter of this first sleeve pipe 71 is suitable with second joint sleeve 72, and outside diameter greater than the collar 73, thereby first joint sleeve 71, second joint sleeve 72 can closely be set on first housing 4, and the collar 73 can be set on first housing 4 more loosely to keep the collar 73 to move by along continuous straight runs.

First joint sleeve 71 is set in the front end of first housing 4, promptly is installed on an end of close second housing 5 on first housing 4.In the left and right sides of first joint sleeve 71 respectively symmetry be provided with the blind groove 711 that opening radially is provided with outwardly, 711 5 one group of these blind groove, every group two ends are equipped with spacing block set 712.

Second joint sleeve 72 is set in the rear end of first housing 4.Being provided with two and accommodating slit 721 of the front end edge radial direction symmetry of this second joint sleeve 72, this accommodate slit 721 for groove and opening forward, at the front end of second joint sleeve 72, each is accommodated the both sides of slit 721 and stretches out two locating convex blocks 722 forward.

The collar 73 can be set on the extended locating convex block 722.The collar 73 inboards two link stoppers 731 that extended internally, and this block 731 places between two locating convex blocks 722.

Spring 74 is accommodated in accommodates in the slit 721.The two ends of spring 74 prop up link stopper 731 respectively and accommodate the end of slit 721.Handle 6 can be set on first joint sleeve 71 and second joint sleeve 72 and rotation.Flange 614 on the handle 6 connects with the collar 73, because the effect of spring force, the collar 73 can prop up flange 614 and apply a power forward to it, thereby make that being located at projection 613 on 612 inner surfaces of mating part can be fastened in any one draw-in groove 711 on first joint sleeve 71, at this moment, handle 6 is fixing, non-rotatable with respect to first housing 4.When needs rotary handle 6, the grip part 611 of holding handle 6 is with handle 6 past post-tensionings, being located at flange 614 on 612 inner surfaces of handle mating part can prop up the collar 73 and apply a power backward to it, thereby the collar 73 can compress spring 74, handle 6 moves backward, projection 613 is thrown off in draw-in groove 711, this moment, handle 6 can rotate by relative first housing 4, after rotating to certain angle, release handle 6, under the effect of spring force, projection 613 is fastened in any one draw-in groove, and handle 6 can be fixing with respect to first housing 4 automatically.

In the present embodiment, first joint sleeve 71 and second joint sleeve 72 tightly fit on first housing 4, certain first joint sleeve 71 and second joint sleeve 72 also can be to be shaped on first housing 4, and can rotate with respect to second housing 5 with first housing 4.

On first joint sleeve 71 draw-in groove 711 positions be arranged so that handle 6 with respect to first or

second housing

4,5 left when the right rotation, can fix in five angle positions between 0 to 50 degree.These five angle positions can be 0 degree, 5 degree, and 30 degree, 45 degree, 50 degree also can be other angle values.

With reference to Fig. 5 and Fig. 6, in the course of work, when needs were tiltedly sawed, one side the operator is angled between saw blade and the base plate at this moment to rotating fuselage, and then back turning handle was to the desired angle fixed-site, and in the present embodiment, handle is returned back to vertical position.

Fig. 7 to Fig. 9 is second embodiment of the present invention.A kind of sweep-saw 100 ', wherein identical with the embodiment in front parts adopt identical label, different is, the handle 6 ' and first housing 4 ' are the monoblock type setting, as shown in Figure 7, first housing 4 ' is used to accommodate motor 2, and its front end inner surface is provided with annular protrusion 40 ', second housing, 5 rear ends are provided with annular groove 50 ', and annular protrusion 40 ' cooperates with annular groove 50 ' to be supported on second housing 5 housing 4 ' of winning and can to relatively rotate.Support 12 is fixedlyed connected with

second housing

5, and 18 on support and base plate 11 pivots flexibly connect.Support 18 is arc and has an arcuate slots, is provided with a sliding screw 19 in this arcuate slots, by cooperating of sliding screw 19 and nut, support 12 and support 18 firmly can be linked together.

When Fig. 8 has disclosed this sweep-saw 100 ' and is in first operating position, saw blade 1 is perpendicular to base plate 11, and handle 6 ' also is perpendicular to base plate 11 directions, is convenient to the operator like this and grips.When Fig. 9 has then disclosed this sweep-saw 100 ' and has been in second operating position, saw blade 1 is inclined with respect to base plate 11, and this moment, handle 6 remains perpendicular to base plate 11, this is by rotary handle 6, and soon annular protrusion 40 ' is gone up to slide at annular groove 50 ' and reached.

It should be noted that: among Fig. 1 to Fig. 6, handle 6 is with respect to

first housing

4 and 5 rotations of second housing, and in Fig. 7 to Fig. 9, because first housing 4 ' is an one with handle 6 ', then handle 6 ' is just with respect to 5 rotations of second housing.

See also Figure 10 to 12, disclosed another embodiment.Among this embodiment, sweep-saw 400 comprises roughly cylindrical first housing 402, is used to accommodate motor 2.This first housing 402 comprises that the outer dia of first terminal 404 and second end, 406, the first ends 404 is slightly larger than second end 406, and the transition portion of the two is the columnar portion 410 of conus portion 408 and close first end 404.Motor 2 is arranged on the axial location of first housing 402, and has rotation X.Motor 2 comprises a motor drive shaft 454 and fan 452.This motor drive shaft 454 is supported by a bearing 456 that is arranged in second housing 412.

Second housing 412 is cube shaped, contains transmission device 3, and this transmission device 3 is used for energy is passed to saw blade (figure does not show) with cut workpiece 426 from motor 2.

First end 404 of the end of second housing 412 and first housing 402 connects, and particularly columnar portion 410.That is to say that the end of second housing 412 extends and is provided with a connecting portion 442, this connecting portion 442 and columnar portion 410 are connected by screw.Also be provided with annular element 418 on connecting portion 442, the outer dia of the two is suitable, and promptly connecting portion 442 mates with annular element 418.

Said modules constitutes a coupling apparatus 423, and annular element 418 can the person of being operated rotate, and makes sweep-saw 400 around rotating shaft Y rotation, and this rotating shaft Y is substantially equal to rotation X.The direction of rotation of annular element 418 is shown in figure double-head arrow 420.When annular element 418 when either direction is rotated, can be fixed in suitable position of rotation by the fixed form that industry is used always.Therefore, this coupling apparatus 423 also comprises a locking device.

It should be noted that annular element 418 here is the parts as handle 422, this handle 422 roughly is the L type, comprises first end and second end near second housing 412, and this second end is a free end.This handle 422 specifically comprises an annular element 418 and grip part 430, and the connecting portion 428 that connects the two, and grip part 430 extends in parallel along the outer surface of first housing 402, and has an electric switch 432 and be used to open and turn-off motor 2.

It is emphasized that, aforesaid coupling apparatus 423 is used for handle 422 is supported with respect to first terminal 404 rotations of first housing 402, by this coupling apparatus 423, handle 422 can also can rotate with respect to second housing 412 around axis Y with respect to first housing 402.

See also Figure 12, handle 422 is locked on the connecting portion 442 of second housing 412.This locking device comprises the hole 450 on the connecting portion 428 that is formed on handle 422, is located in the pull bar 446 in the hole 450, and is connected pull bar 446 free-ended action bars 440 by a pin 449.This action bars 440 comprises that a cam surface 444 is used for and a packing ring 448 mating reactions.This packing ring 448 is sheathed on the pull bar 446, and between connecting portion 428 and action bars 440.By rotating this action bars 440, annular element 418 just can clamp or release on the position of rotation arbitrarily.

The below of second housing 412 is connected with an arc support 434, and this support 434 is supported by base plate 424.Such support 434 is in the industry cycle known by the people, particularly the sweep-saw field.It can provide one to make fuselage, the mode that tilts with respect to base plate 424 of first housing 402, second housing 412 just, promptly with respect to the deflection of Z axle, the Z axle here is the rotation Y that is parallel to motor axis of rotation line X or handle, is positioned at the top of base plate 424 haply.This support 434 can also be locked in first housing 402, second housing 412 on the position of an inclination, therefore, sweep-saw 400 can be the angle of inclination with respect to base plate 424 and Z axle, and need not consider axis X, Y, thereby in practical operation, the operator rotate and fixes angle gripping handle grip part 430 cut workpiece 426 that just can be comparatively comfortable around Y-axis by rotary handle 422.

At work, the operator always wish can be on vertical angle gripping handle grip part 430, such position is labeled as " V " in Fig. 5 and 6, can realize by simple the adjusting.

In addition, from Figure 11, obviously can see, the horizontal length of handle 422 is less than first housing 402 and second housing, 412 sums, and, the horizontal length of handle 422 is the horizontal lengths less than first housing 402, or the horizontal length of grip part 430 is the horizontal lengths less than first housing 402.

Please continue to consult Figure 10 to Figure 12, handle 422 is the centre positions that are connected of rotation, promptly on the position of the front end face 436 of close sweep-saw 400.Based on this position,, simultaneously, also can allow sweep-saw 400 easier operations because the center of gravity of handle 422 is positioned at the middle part of entire curve saw, thereby in the process of operation, can provide stronger steadiness.

Certainly, according to the present invention, handle 422 can also be positioned on first housing 402, or between first housing 402 and second housing 412, thereby, make the handle 422 can be blocked more firm, also be easier to operation.

Claims

1. a sweep-saw comprises: saw blade; First housing contains motor in described first housing, and described motor has rotation X; Second housing contains transmission device in described second housing, and described transmission device is delivered to saw blade with energy from motor, and described second housing is connected on first housing; Handle, described handle move described sweep-saw makes it with respect to workpiece motion s; It is characterized in that: described handle is supported on described first housing or second housing, and described handle at least can be with respect to a rotation in described first housing or second housing.

2. sweep-saw according to claim 1 is characterized in that: the horizontal length of described handle is less than the horizontal length of described first housing.

3. sweep-saw according to claim 1 is characterized in that: described handle is around rotation X or be parallel to the axis Y rotation of rotation X.

4. according to the arbitrary described sweep-saw of claim 1 to 3, it is characterized in that: described handle and described first housing are the integral type setting, thereby jointly with respect to described second housing rotation.

5. according to the arbitrary described sweep-saw of claim 1 to 3, it is characterized in that: described handle connects by a jockey and described first housing, and described handle is rotated with respect to described first housing.

6. sweep-saw according to claim 5 is characterized in that: described handle comprises grip part and the mating part that is connected with described first housing.

7. sweep-saw according to claim 6 is characterized in that: described grip part is D shape or L shaped structure.

8. according to claim 6 or 7 described sweep-saws, it is characterized in that: described mating part is arc, and mating part inner surface and first housing outer surface to small part are complementary.

9. sweep-saw according to claim 8 is characterized in that: described jockey is provided with locking device makes handle to fix with respect to first housing.

10. sweep-saw according to claim 9, it is characterized in that: described jockey comprises that first joint sleeve that is installed on contiguous second housing on first housing reaches second joint sleeve away from second housing, the mating part of described handle is the cavity cylinder, its inner surface matches with the outer surface of described first and second joint sleeve, and can make handle with respect to described first and second joint sleeve motion.

11. sweep-saw according to claim 10 is characterized in that: described first joint sleeve and second joint sleeve difference integral molding are on described first housing.

12. sweep-saw according to claim 10 is characterized in that: described first joint sleeve and second joint sleeve and first housing are split type setting.

13. according to claim 11 or 12 described sweep-saws, it is characterized in that: described locking mechanism comprises some draw-in grooves of being located on first joint sleeve, be located at the projection of described cavity cylindrical inner surface, described projection cooperate with draw-in groove can so that handle fix with respect to described first housing.

14. sweep-saw according to claim 13, it is characterized in that: the cylindrical inner surface of described cavity is provided with flange, an end of contiguous first joint sleeve is connected with the collar on described second joint sleeve, one side of the described collar is near described flange, opposite side is against there being a flexible member, and described flexible member is between the described collar and described second joint sleeve.

15. sweep-saw according to claim 1 is characterized in that: described motor is motor or air motor.

16. sweep-saw according to claim 1 is characterized in that: described first housing comprises first terminal and second end, and described second housing is connected on first end; Described handle has grip part and the annular element that is connected on the grip part; Described sweep-saw also comprises a coupling apparatus, and described handle is connected on first end of described first housing by coupling apparatus, and can be around an axis Y with respect to first housing and the rotation of second housing.

17. sweep-saw according to claim 16 is characterized in that: described axis Y is parallel to described rotation X.

18. sweep-saw according to claim 16 is characterized in that: described first housing is formed by two semi-handle combination of components.

19. sweep-saw according to claim 16 is characterized in that: described coupling apparatus comprises locking device, and described locking device is locked in handle on the position of rotation with respect to axis Y.

20. sweep-saw according to claim 19 is characterized in that: described locking device comprises the action bars with cam surface.

21. a sweep-saw comprises: saw blade; First housing contains motor in described first housing, and described motor has rotation X; Second housing contains transmission device in described second housing, and described transmission device is delivered to saw blade with energy from motor, and described second housing is connected on first housing; Handle, described handle move described sweep-saw makes it with respect to workpiece motion s, and described handle has first end and second end; It is characterized in that: described handle is supported on described first housing, and described handle at least can be with respect to a rotation in described first housing or second housing.

22. a sweep-saw comprises: saw blade; First housing contains motor in described first housing, and described motor has rotation X; Second housing contains transmission device in described second housing, and described transmission device is delivered to saw blade with energy from motor, and described second housing is connected on first housing; Handle, described handle move described sweep-saw makes it with respect to workpiece motion s; It is characterized in that: first end of described handle is supported on described second housing, and second end is a free end, and described handle at least can be with respect to a rotation in described first housing or second housing.