CN206275446U - For the chair back wane lock mechanism of chair bottom - Google Patents

Abstract

The utility model discloses a kind of chair back wane lock mechanism for chair bottom, including lockplate, latch and plug housing, lockplate is provided with row's lockhole, lockplate with chair bottom seesaw synchronous axial system, plug housing is in lockplate side and plug housing is fixedly linked with the base of chair bottom, latch slides and is interspersed on plug housing and coordinates with lockhole, latch is connected with the elastic yarn that elastic force is produced when form produces change, the elastic force of elastic yarn makes latch be automatically inserted into corresponding lockhole, and elastic yarn is connected with the drive device being driven to elastic yarn；The utility model controls latch to move by elastic yarn, elastic yarn controls deformation by drive device, when drive device drives elastic yarn to produce change, elastic yarn is changed into heeling condition and thus produce elastic force, latch remains inserted into the situation of lockhole in the presence of elastic force, when lockplate turns to lockhole with seesaw to be aligned with latch, latch inserts corresponding lockhole in the presence of elastic force.

Description

For the chair back wane lock mechanism of chair bottom

Technical field

The utility model is related to swivel chair, office chair technical field, and more particularly to a kind of chair back for chair bottom sticks up Plate locking mechanism.

Background technology

Chair bottom, also referred to as Revolving chair chassis or Revolving chair tray, are installed in a weight below swivel chair or office chair seat cushion Part is wanted, the lifting of seat cushion, the elevation angle regulation of backrest is all completed by chassis.

Current Revolving chair chassis are generally to be made up of parts such as top tray, lower joist, rotating shaft and spring assemblies, top rotary table After being fixed with swivel chair seat back, swivel chair can around the shaft make appropriate reclining, and can actively reply, and user is had comfort.Example Such as, Chinese patent discloses a kind of pallet (Patent No.：02287885.8), mainly including base plate, sliding seat, conical pipe and tune Regulating device, sliding seat is movably connected in base plate, the conical pipe of connection air pressure rod in the middle of sliding seat, by Taper Pipe fixed plate and cone Shape pipe is welded in sliding seat together；Described adjusting means includes adjusting rod, adjustable plate, torsion spring a, torsion spring a fixed plates, adjusts Pole is interspersed in sliding seat, and adjustable plate is fixedly connected on the one end in adjusting rod insertion sliding seat, and the one side of adjustable plate connects Air pressure rod is touched, another side is connected with torsion spring a；Spin-ended of adjustable plate is provided with the another side of adjustable plate.

The adjusting means of above-mentioned Revolving chair tray is adjusted completely by torque spring, required for the different people of body weight The power needs of the torque spring wanted are different, product is not had good versatility.

For this problem, JP sends out chair bottom a kind of, including base, is used to fix the bracket of seat support and is used to connect The seesaw of the chair back, bracket is arranged in base, and seesaw is arranged in bracket, and seesaw middle part is installed with the first bearing pin and seesaw is with first Bearing pin is rotating fulcrum, and the first bearing pin is connected through bracket and with base, and seesaw front end both sides symmetrically offer gain, in gain Inside it is equipped with the second bearing pin and the second bearing pin is connected with bracket, in the symmetrical rail offered with the cooperation of the first bearing pin in the both sides of bracket Road groove, the first bearing pin is located in rail groove, and the chassis also includes enabling bracket recover former after seesaw prizes movement of bracket The elasticity reset device of position.

The seesaw on above-mentioned chassis directly acts on bracket, and the chair back is connected and fixed on driving of the seesaw as seesaw and bracket Power, the gravity that human body puts on seat support forms the restoring force for being applied to bracket by being articulated with the second bearing pin of bracket, bracket Driving force and restoring force form Antagonistic Relationship；Specifically, the second bearing pin for being connected to bracket, the second pin are provided with seesaw front end Axle is plugged in the gain that seesaw front end opens up, and the second bearing pin is driven so as to lift bracket, second by gain when seesaw is rotated Bearing pin produces sliding in gain；During human body backward reclining, the gravity for loading on seat support is transmitted to chair back restoring force Ratio is incrementally increased, and provides rational backrest restoring force all the time in whole process so that the lighter or heavier people of body weight can Easily reclining and reply is stood up.

But user wishes for seat back lock to identify oneself comfortable position at one, to carry out lunch break or stop for a long time Breath, as a rule, be in the form of being readily apparent that in the form of latch insertion lockhole, but seesaw is movable, directly by latch Insertion lockhole one comes position and is not easy alignment, and power needed for two are larger, be inserted directly into it is relatively difficult to achieve, so needing that design is a kind of to be held Easily realize the seesaw locking mechanism of above-mentioned functions to solve this problem, seesaw is automatically locked at into one identifies oneself suitable position Put, also just the chair back has been fixed on corresponding position.

Utility model content

The utility model overcomes the deficiency in the presence of above-mentioned prior art, there is provided convenient insert latch of one kind is locked The chair back wane lock mechanism in hole, the locking mechanism makes latch produce preparation power, when corresponding lockhole aligns with latch, automatically will Latch insertion correspondence lockhole, reaches the purpose of locking.

What the technical solution of the utility model was realized in：

For the chair back wane lock mechanism of chair bottom, including lockplate, latch and plug housing, lockplate is provided with One row's lockhole, lockplate with chair bottom seesaw synchronous axial system, plug housing be in lockplate side and plug housing and office chair The base on chassis is fixedly linked, and latch is slided and is interspersed on plug housing and coordinates with lockhole, and latch is connected with when form produces change The elastic yarn of elastic force, the elastic force of elastic yarn are produced during change makes latch be automatically inserted into corresponding lockhole, and elastic yarn is connected with to bullet The drive device that sex pilus is driven.By above-mentioned locking mechanism, can feel easypro by the chair back easily is fixed on into certain user Suitable position.

Preferably, described drive device includes the adjusting rod being horizontally inserted in base, axial restraint set on adjusting rod Sleeve piece is provided with, one end of elastic yarn is stuck in external member, the other end connecting bolt of elastic yarn.Adjusting rod is the bar lifting of control gas Adjusting rod, locking, the unlocking motion of latch are realized using same adjusting rod, structure is simplified and ingenious, easy to use；When When adjusting rod stress is moved along latch direction of insertion, elastic yarn is changed into heeling condition and thus produce elastic force, latch is in elastic force The situation of lockhole is remained inserted under effect, when lockplate turns to lockhole with seesaw to be aligned with latch, work of the latch in elastic force With the corresponding lockhole of lower insertion；Avoid latch directly when being synchronized with the movement with adjusting rod because elasticity reset device power is larger so that The more difficult insertion lockhole of latch.

Preferably, external member is provided with the waist hole set along external member circumferential direction, it is provided with waist hole and is connected with adjusting rod Screw.Be fixed on external member axial direction on adjusting rod by screw, while waist hole is played when adjusting rod rotates regulation gas bar keeping away Allow the effect of screw.

Preferably, described elastic yarn is provided with extension, the free end of extension is bent to form crotch, on plug housing A word hole is provided with along latch moving direction, described crotch is plugged in a word hole and the stroke of crotch is subject to a word hole two ends Limitation.It is possible thereby to limit the stroke of latch, prevent latch from departing from plug housing.

Preferably, seesaw middle part be installed with the first bearing pin and seesaw with the first bearing pin be rotating fulcrum, described seesaw bag Include two side plates of two spaced and parallel side plates and connection and it is used to connect the connecting plate of the chair back, connects between two side plates Cross bar is connected to, the two ends of lockplate are respectively sleeved on cross bar and the first bearing pin, and lockhole is positioned close at the position of cross bar.

Latch is set smoothly to insert in lockhole for convenience, preferably, diameter of the aperture of lockhole more than latch.

Preferably, described lockplate is in the first bearing pin middle part or at the position at middle part.Thus, seesaw is locked Determine forced position and be transferred to chassis middle part, it is that can control only to match somebody with somebody a unification lockplate by a latch, not only facilitates grafting position Alignment accuracy is put, overall stress is also caused evenly.

Preferably, be cased with plastic bushing on cross bar, plastic bushing with lockplate intersection location at be truncated so as to A breach is formed, described lockplate is stuck in breach just.The presence of plastic bushing can not only avoid torsion spring and cross bar Directly contact sends sound, and also acts the effect for blocking lockplate, kills two birds with one stone.

Preferably, described lockplate is welded and fixed with cross bar.It is possible thereby to avoid lockplate along cross bar axis direction Produce movement.

Preferably, described adjusting rod controls the lifting of gas bar simultaneously.Adjusting rod with control gas bar lift control-rod be Same rod, farthest simplifies structure.

Employing design starting point of the present utility model, theory and the beneficial effect of above-mentioned technical proposal is：

The utility model controls latch to move by elastic yarn, and elastic yarn controls deformation by adjusting rod, when adjusting rod is received When power is moved along latch direction of insertion, elastic yarn is changed into heeling condition and thus produce elastic force, latch to be protected in the presence of elastic force The situation of insertion lockhole is held, when lockplate turns to lockhole with seesaw to be aligned with latch, latch is inserted in the presence of elastic force Corresponding lockhole；Avoid when latch is directly synchronized with the movement with adjusting rod because elasticity reset device power is larger so that latch is more difficult Insertion lockhole.

Brief description of the drawings

Fig. 1 is the inside dimensional structure diagram on the utility model chassis in embodiment；

Fig. 2 is the planar structure schematic diagram of Fig. 1；

Fig. 3 is the inside dimensional structure diagram of another angle in the utility model chassis in embodiment；

Fig. 4 is the fractionation structural representation on the utility model chassis；

Fig. 5 is the fractionation structural representation of another angle in chassis in embodiment；

Fig. 6 is the another form of internal dimensional structure diagram in the utility model chassis in embodiment；

Fig. 7 is the dimensional structure diagram of seesaw in embodiment；

Fig. 8 is the view of seesaw and base engagement in embodiment；

Fig. 9 is explosive view of the present utility model in embodiment；

Figure 10 is the explosive view of another angle of the utility model in embodiment；

Figure 11 is the planar structure schematic diagram that chassis is under original state；

Figure 12 is the dimensional structure diagram that chassis is under original state；

Figure 13 be chassis it is in running order under planar structure schematic diagram；

Figure 14 be chassis it is in running order under dimensional structure diagram；

Figure 15 is schematic diagram of the chassis on gas bar；

Figure 16 is the structural representation that elastic yarn is engaged with lockplate；

Figure 17 is the structural representation of another angle that elastic yarn is engaged with lockplate；

Figure 18 is the fit structure schematic diagram of elastic yarn extension and plug housing；

The schematic diagram that Figure 19 is in the lock state for the latch of chair back wane lock mechanism；

Figure 20 is in the schematic diagram of unlocked state for the latch of chair back wane lock mechanism.

Specific embodiment

In order to be more clearly understood that above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the accompanying drawings and tool Body implementation method is further described in detail to the utility model.It should be noted that in the case where not conflicting, this Shen Feature in embodiment please and embodiment can be mutually combined.

Many details are elaborated in the following description in order to fully understand the utility model, but, the present invention Can also be different from other modes described here using other to implement, therefore, protection domain of the present utility model is not received The limitation of following public specific embodiment.

Specific embodiment of the present utility model is as follows：

Embodiment：The reference azimuth of each part of the utility model is defined first, and the utility model exists chassis and office chair When normal mounting is used, the front of office chair is front end, and the position where the rear of office chair includes backrest is rear end, chassis Front end be region away from seesaw, the rear end on chassis is the region for being close to seesaw.

Chair back wane lock mechanism of the present utility model is the important component of chair bottom, one kind of the present embodiment Chair bottom, it is also possible to referred to as a kind of Revolving chair chassis, as shown in Fig. 1~Figure 10, including is used to connect the base 1 of gas bar, uses With the seesaw 3 fixed the bracket 2 of seat support and be used to connect the chair back, bracket 2 is arranged in base 1, and seesaw 3 is arranged in bracket 2； Specifically, described base 1 includes being used to connect the base plate 4 of gas bar, is vertically respectively provided with the left and right sides of base plate 4 One supporting plate 5, supporting plate 5 is fixedly linked with base plate 4, and the whole chassis of base plate 4 pairs and seat support, the chair back serve supporting role.

As shown in Figure 4,5, the first axis hole 9 is arranged with the rear end of the supporting plate 5 of the both sides of base 1, the middle part of seesaw 3 is installed with First bearing pin 11 and seesaw 3 are rotating fulcrum with the first bearing pin 11, and the first bearing pin 11 is connected through bracket 2 and with base 1；Specifically Say, offer the rail groove 32 that coordinates with the first bearing pin 11 the both sides of bracket 2 are symmetrical, the first bearing pin 11 is located in rail groove In 32, the first bearing pin 11 is one whole major axis, and the two ends of the first bearing pin 11 are planted after each sequentially passing through seesaw 3, rail groove 32 In the first axis hole 9.In order that overall keep attractive in appearance, the front end of base 1 is provided with shield 33.

The front end both sides of seesaw 3 symmetrically offer gain 6, the second bearing pin 8 are equipped with gain 6 and the second bearing pin 8 and support Frame 2 is connected；Specifically, the second axis hole 10 is symmetrically arranged on two with the front end of bracket 2, the second described bearing pin 8 is one whole long Axle, the two ends of the second bearing pin 8 are inserted in the second axis hole 10 after each passing through gain 6.

Described bracket 2 includes being used to connect the supporting plate 7 of seat support, and the both sides of supporting plate 7 have extended downwardly and first, second bearing pin 11st, 8 auxiliary section 12 for coordinating.

For the movement locus of specification bracket, determine movement of bracket path generation, will not run chaotically or shake；Seesaw 3 front portions are symmetrically arranged on two with controls connecting rod 30, and one end of controls connecting rod 30 rotates with the second bearing pin 8 and is connected, controls connecting rod 30 The other end be connected by the rotation of the 3rd bearing pin 31 and base 1.

The direction that rail groove 32 described from lower to upper is towards being close to seesaw 3 is obliquely installed, from lower to upper described waist Groove 6 is towards being obliquely installed away from the direction of seesaw 3.

The chassis also includes prizing the elasticity reset device for enabling bracket set back after bracket 2 is moved when seesaw 3； In the present embodiment, described elasticity reset device is torsion spring 12, and torsion spring 12 is set on the first bearing pin 11, a torsion of torsion spring 12 Arm 121 offsets with base 1, another torque arm 122 and the synchronous axial system of seesaw 3 of torsion spring 12；Specifically, as shown in Fig. 5,7,8, It is that described seesaw 3 includes two side plates 13 of two spaced and parallel side plates 13 and connection and be used to connect the connecting plate of the chair back 14, connecting plate 14 is located at outside base 1, and gain 6 is opened on side plate 13, and baffle plate 15 is provided with the bottom surface of base 1, two sides Cross bar 15 is connected between plate 13, a torque arm 121 and the baffle plate 15 of torsion spring 12 offset, another torque arm 122 of torsion spring 12 with Cross bar 15 offsets.

When the chair back or the reclining of seesaw 3 are to maximum angle, bracket 2 or seat support with the distance that the chair back is moved backward for 15~ 40mm, most preferably 30mm；The chair back backward reclining angle be 10~30 degree, most preferably 21 degree.

When the utility model is installed and used on swivel chair, under original state, people is sitting on swivel chair, as shown in Figure 11,12, In the presence of torsion spring torsion, seat support, human bady gravitational, supporting plate 7 is pressed in two supporting plates (not shown) of base 1；When people leans on backward During arm-chair is carried on the back, as shown in Figure 13,14, bracket 2 can drive seat support to interlock, and make seat support also follow the rotation of the chair back to be moved back by It is dynamic.

Further say, as shown in Figure 15~20, in order to by seat back lock, a suitable position, the chassis also sets up There is chair back wane lock mechanism, described chair back wane lock mechanism includes lockplate 16, latch 17 and plug housing 18, lockplate 16 are provided with row's lockhole 19, and lockhole 19 is multiple, and the present embodiment is preferably 3, and lockplate 16 is inserted with the synchronous axial system of seesaw 3 Key seat 18 is in the side of lockplate 16 and plug housing 18 is fixedly linked with base 1, the slip of latch 17 be interspersed on plug housing 18 and with Lockhole 19 coordinates, and latch 17 is connected with the elastic yarn 20 that elastic force is produced when form produces change, and the elastic force of elastic yarn 20 makes to insert Pin 17 is automatically inserted into corresponding lockhole 19, and elastic yarn 20 is connected with the drive device being driven to elastic yarn 20；Elastic yarn 20 is steel wire, and its original state is vertical state, when its driven device is dragged, because the upper and lower ends of elastic yarn 20 are fixed, Therefore its run-off the straight deformation, thus produces elastic force.

As shown in Figure 16,17,18, described drive device includes the adjusting rod 21 being horizontally inserted in base 1, adjusting rod 21 Adjust gas bar simultaneously again, axial restraint is arranged with the external member 22 of a plastic material on adjusting rod 21, and external member 22 is provided with draw-in groove 34, One end of elastic yarn 20 is stuck in the draw-in groove 34 of external member 22, the other end connecting bolt 17 of elastic yarn 20；External member 22 is provided with edge The waist hole 23 that the circumferential direction of external member 22 is set, is provided with the screw 24 being connected with adjusting rod 21, because waist hole 23 is to spiral shell in waist hole 23 Silk 24 serves avoidance effect, so that adjusting rod 21 can freely rotate the bar lifting of regulation gas.

Further say, described elastic yarn 20 is provided with extension 25, the free end of extension 25 is bent to form crotch 26, A word hole 27 is provided with along latch moving direction on plug housing 18, it is interior and crotch 26 that described crotch 26 is plugged on a word hole 27 Stroke is limited by the two ends of a word hole 27, so that crotch 26 is without departing from plug housing 18.

Lockplate 16 is by the following manner installation settings：The two ends of lockplate 16 are respectively sleeved at the pin of cross bar 15 and first On axle 11, the axis perpendicular of plane and the first bearing pin 11 where lockplate 16, lockhole 19 is positioned close to the position of cross bar 15 Put place；Described lockplate 16 is in the middle part of the first bearing pin 11 or at the position at middle part；Inserted for the ease of latch 17, locked Diameter of the aperture in hole 19 more than latch 17.

As shown in figure 19, sound is sent to avoid metal from contacting, plastic bushing 28, plastic bushing 28 is cased with cross bar 15 With the intersection location of lockplate 16 at be truncated so as to form a breach 29, described lockplate 16 is stuck in breach 29 just It is interior.

When in unlocked state, as shown in figure 20, latch 17 departs from lockhole 19, and now, people sits on the seat, can be with With the arbitrarily angled dependence chair back；When the initial position in not leaning on and when being allowed to be in the lock state, adjusting rod 21 is stirred, made Elastic yarn 20 is changed into heeling condition from vertical state, elastic force, that is, cushion effect is produced, when lockplate 16 turns to corresponding lockhole When being aligned with latch, latch is automatically inserted into corresponding lockhole the locking for realizing lockplate in the presence of cushion effect, makes seesaw It is not rotated further by.

In description of the present utility model, term " multiple " then refers to two or more, unless otherwise clearly restriction. Term " first ", " second ", " the 3rd " etc. are only used for the purpose of description, and it is not intended that indicating or implying relative importance.

The term such as term " installation ", " connected ", " connection ", " fixation " all should be interpreted broadly, for example, " connection " can be It is fixedly connected, or is detachably connected, or is integrally connected；" connected " can be joined directly together, it is also possible to by centre Medium is indirectly connected to.For the ordinary skill in the art, can as the case may be or tool of the present utility model Body is explained to understand concrete meaning of the above-mentioned term in the utility model.

In description of the present utility model, it is to be understood that term " on ", the orientation of the instruction such as D score or position relationship be Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than instruction Or imply that the device or unit of meaning must be with specific directions, with specific azimuth configuration and operation, it is thus impossible to understand It is to limitation of the present utility model.

In the description of this specification, the description of term " specific embodiment " etc. means that combining the embodiment or example describes Specific features, structure, material or feature be contained at least one embodiment of the present utility model or example.In this specification In, the schematic representation to above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, Structure, material or feature can in an appropriate manner be combined in one or more any embodiments or example.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.

Claims (10)

1. the chair back wane lock mechanism of chair bottom is used for, it is characterized in that：Including lockplate, latch and plug housing, locking Plate is provided with row's lockhole, lockplate with chair bottom seesaw synchronous axial system, plug housing is in lockplate side and plug housing Base with chair bottom is fixedly linked, and latch slides and is interspersed on plug housing and coordinates with lockhole, and latch is connected with works as shape The elastic yarn of generation elastic force when state produces change, the elastic force of elastic yarn makes latch be automatically inserted into corresponding lockhole, and elastic yarn connects It is connected to the drive device being driven to elastic yarn.

2. chair back wane lock mechanism according to claim 1, it is characterised in that：Described drive device is inserted including level Enter the adjusting rod in base, axial restraint is arranged with sleeve piece on adjusting rod, one end of elastic yarn is stuck in external member, elastic yarn Other end connecting bolt.

3. chair back wane lock mechanism according to claim 2, it is characterised in that：External member is provided with along external member circumferential direction The waist hole of setting, is provided with the screw being connected with adjusting rod in waist hole.

4. chair back wane lock mechanism according to claim 1, it is characterised in that：Described elastic yarn is provided with extension, The free end of extension is bent to form crotch, and a word hole is provided with along latch moving direction on plug housing, and described crotch is planted In a word hole and the stroke of crotch is limited by a word hole two ends.

5. chair back wane lock mechanism according to claim 1, it is characterised in that：Seesaw middle part is installed with the first bearing pin and sticks up Plate with the first bearing pin be rotating fulcrum, it is that described seesaw includes two side plates of two spaced and parallel side plates and connection and use To connect the connecting plate of the chair back, cross bar is connected between two side plates, the two ends of lockplate are respectively sleeved at cross bar and first On bearing pin, lockhole is positioned close at the position of cross bar.

6. chair back wane lock mechanism according to claim 5, it is characterised in that：The aperture of lockhole is straight more than latch Footpath.

7. chair back wane lock mechanism according to claim 5, it is characterised in that：Described lockplate is in the first bearing pin Middle part or at the position at middle part.

8. chair back wane lock mechanism according to claim 5, it is characterised in that：Plastic bushing is cased with cross bar, is moulded Material sleeve pipe with lockplate intersection location at be truncated so as to form a breach, described lockplate is stuck in breach just.

9. chair back wane lock mechanism according to claim 5, it is characterised in that：Described lockplate is solid with cross bar welding It is fixed.

10. chair back wane lock mechanism according to claim 2, it is characterised in that：Described adjusting rod controls gas simultaneously Bar is lifted.