CN1033411C

CN1033411C - Rotary stepping switch

Info

Publication number: CN1033411C
Application number: CN 93104334
Authority: CN
Inventors: 黄彬
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-14
Filing date: 1993-04-14
Publication date: 1996-11-27
Anticipated expiration: 2013-04-14
Also published as: GB9208157D0; HK163496A; GB2266187B; GB9215713D0; GB2266187A; HK163596A; GB2266185B; GB2266185A; CN1078825A

Abstract

A rotary stepping switch comprises a casing formed by at least two parts held together by a shaft , a rotor supported within the casing by the shaft for rotation about an axis, a movable switch contact carried on the rotor , a driving member supported for rotation within the casing about the axis for rotating in a driving direction the rotor in order to move the movable switch contact into or out of electrical contact with one or more stationary switch contacts , one-way clutch means provided between the driving member and the rotor in order for the driving member to impart a stepwise drive to the rotor , and one-way stopping means provided within the casing, eg direct engagement between the rotor and a stationary contact, for stopping the rotor against rotation upon return rotation of the driving member in a non-driving direction .

Description

Rotary stepping switch

The present invention relates to a kind of rotary stepping switch, this switch is applicable to household electrical appliance.

The existence of rotary stepping switch is known, for example is disclosed in the rotary stepping switch in UK Patent Application GB2173343A and the Chinese utility application 91212191.2.Such rotary stepping switch comprises one by at least two housings of partly forming, an axle, one is bearing in the housing round the rotor of an axis rotation by this, a plurality of make and break contacts of deciding that are positioned at housing, a moving make and break contact that is contained on the rotor, one be bearing in the housing around this axis rotation with rotor along driving direction rotate in case move moving make and break contact make itself and one or more decide make and break contact electrically contact or disengage can be on angle reciprocating actuator, one is arranged on and makes the actuator one-way clutch apparatus that transmission drives step by step to rotor between actuator and the rotor, the unidirectional retaining device that rotor is stopped operating when being arranged on the inherent actuator of housing along non-driving direction revolution.The shortcoming of these rotary stepping switchs is, some does not have two parts of its housing along putting it to be firmly fixed together jockey, some will be by independent setting jockey, for example screw connection or use bonding not quite easily glue, can be fixed together, thereby increased the assembly work amount.

The object of the present invention is to provide shortcoming in a kind of above-mentioned assembly work that can overcome rotary stepping switch, simplify assembly work, improved rotary stepping switch that two parts of housing are fixed together.

The technical scheme that realizes purpose of the present invention is that in described axle and described at least two housings part is integrally formed and is arranged to each housing partly is fixed together.

Described axle preferably is arranged to pass another housing basically partly to engage with its free end.

In a preferred embodiment, thus the free end of described axle is swollen or is out of shape with described another housing and partly engaged.

Described actuator preferably is rotatably supported in described axle upward and by a spring ground biasing makes it rotate along non-driving direction.

In a kind of specific structure, actuator and rotor be axial engagement mutually directly, and has on their composition surfaces separately and can cooperatively interact to constitute the appearance of described one-way clutch apparatus.

The form of the gear ring that is made of adjacent asymmetric tooth is preferably adopted in every kind of appearance, and the corresponding appearance of actuator and rotor is complementary.

In a specific structure, unidirectional retaining device be by rotor with decide make and break contact at least one contact between direct the joint constitute.

Described rotor is preferably in has the gear ring that is made of the asymmetric tooth by adjacent that radially outward stretches on its periphery, and described at least one decide the make and break contact elastically deformable, it is engaged along a tooth that comes with catching up with of described tooth under the effect of non-driving direction at actuator at rotor.

In a preferred embodiment, the termination of the rotor that engages with actuator is divided into a plurality of fan-shaped sections, and each section radially increases from an end to the other end to form two gear rings with axial outside direction simultaneously gradually along non-driving direction.

To do to describe more specifically with reference to accompanying drawing by way of example to the present invention below, in the accompanying drawing:

Fig. 1 is the decomposition diagram of an embodiment of rotary stepping switch of the present invention;

Fig. 2 is the birds-eye perspective of rotary stepping switch shown in Figure 1;

Fig. 3 is the face upwarding view of rotary stepping switch shown in Figure 1;

Fig. 4 is the side sectional view of rotary stepping switch shown in Figure 1;

Fig. 5 is the lower house vertical view partly of rotary stepping switch shown in Figure 1;

Fig. 6 is the upper shell upward view partly of rotary stepping switch shown in Figure 1.

Referring to accompanying drawing, show one among the figure and embody rotary stepping switch 10 of the present invention that this switch 10 comprises one by the upper shell part 12 of plastics and lower house part 13 housings that form 11 of plastics, and one is clipped in the partly dividing plate 14 between 12 and 13 of housing.Lower house partly 13 has the upright Unitarily molded central shaft 15 that goes out thereon of a diapire 13A and.Axle 15 passes one and is formed on bigger central openings 16 on the dividing plate 14 and one and is formed on the partly smaller medium pore 17 on 12 the roof 12A of upper shell.

Shown in Fig. 2 and 4, axle 15 free end 15A arrive one basically with the upper shell position that flushes of the outer surface of roof 12A partly.For housing partly 12 and 13 is permanently linked together together with the dividing plate 14 that is clipped in therebetween, the free end 15A of axle 15 can make its distortion with the method for heating or swell, for example the tip with the instrument (not shown) of a heating presses down, thereby makes distortion or the free end 15A that swells can engage with hole 17 securely.

Rotary stepping switch 10 also comprises the switching mechanism 18 and the driving mechanism 19 that is located in the lower house part 13 that are located in the upper shell part 12.

Switching mechanism 18 disposes that four equal angles separate decides make and break contact 20, they are arranged in the dimple 21 of each the corresponding configuration in the upper shell part 12, and being provided with a moving make and break contact 22, this movable contact is bearing on the rotor 23 that is roughly columniform, as to constitute switching mechanism 18 component part.

Each is made of a suitable S shape copper sheet to decide make and break contact 20, and is divided into two groups of 20A and 20B, and last group of 20A is positioned at darker dimple 21A, and then one group of 20B then is positioned at more shallow dimple 21B.Partly have four openings 24 in 12 respective corner place at upper shell, each opening provides access for the wiring of deciding accordingly make and break contact 20.For the make and break contact 20A in dark dimple, have an obturator 25 to be arranged in each dimple 21A so that corresponding make and break contact 20A is held in place, simultaneously also with the vacant part of corresponding opening 24, be that openend is blocked, as shown in Figure 6.

Rotor 23 has a central axial hole 23A, and axle 15 stretching, extensions are passed this hole and rotated thereon with supporting rotor 23.Moving make and break contact 22 falls L shaped copper sheet by one and forms, and its level partly 22A is provided with around the upper end of rotor 23, accounts for 240 ° of circumference, and its vertical component 22B is basically along the total length stretching, extension of rotor 23.The level of the copper sheet partly two ends of 22A has the protrusion tab 22C of corresponding fall home, and these protrusion tabs are bonded on (not shown) in the corresponding radial slot of rotor 23, so that will move make and break contact 22 fix in position.The vertical part 22B of copper sheet have enough length extend through fully be positioned at Different Plane decide make and break

contact

20A and 20B.

Make and break contact 20 becomes to utilize moving make and break contact 22 that multiple different switch situation is provided itself with 22 structure with layout design so that decide to constitute electrical connection between the make and break contact 20, this in the industry personnel all know.

The lower end of rotor 23 is divided into four fan-shaped sections or fourth class segmentation 26, and these fourth class segmentations radially outward and on the axially downward direction are increasing simultaneously gradually.On the direction of an angle shown in arrow X in Fig. 1 and 6, each fourth class segmentation 26 radially outward and on the axially downward direction is enlarging from an end to the other end simultaneously gradually.A kind of so surperficial appearance or profile have produced first gear ring 23 that extend radially outwardly around rotor, that be made up of four adjacent asymmetric teeth 27 and one second gear ring that axially extend from the lower end of rotor 23, that be made up of four adjacent asymmetric teeth 28 downwards.Have the thickness of a groove 29 on the tooth 27 therein with the lower end of the vertical part 22B that holds moving make and break contact 22.

Driving mechanism 19 comprise one can be on angle reciprocating driving-disc 30, it has a medium pore 30A, axle 15 passes this hole and rotates thereon to support this driving-disc 30.Driving-disc 30 has a upright central neck ring 31 round hole 30A.Neck ring 31 is divided into four duplicate fourth class segmentations, each fourth class segmentation becomes the gradient to rise from the one end to the other end along the angle direction shown in the arrow Y Fig. 1 and 5 gradually, thereby forms a gear ring that is made of four adjacent asymmetric teeth 32 round the top of neck ring 31.

Tooth 28 has identical asymmetric triangular-shaped profile with tooth 32, promptly has the axially extended limit and long limit that tilts slightly of weak point, but the direction X of directed in opposite and Y, thereby they are complementary also closely interlocks mutually.

Driving-disc 30 is pushed dividing plate 14 to coaxially by a helical spring 33 from below, helical spring 33 is placed on the axle 15 and with its two ends and works between the diapire 13A of driving-disc 30 and lower house part 13.The perforate 16 that the neck ring 31 of driving-disc 30 passes dividing plate 14 engages with rotor 23, and the mutual interlock of corresponding gear ring by

tooth

28 and 32 is formed provides a kind of one-way clutch effect between rotor 23 and driving-disc 30.This structure is flexibly pressed against on the rotor 23 driving-disc 30 all the time by helical spring 33.

Has an opening on the sidewall 13B of lower house part 13, its form is to become whole threaded pipe 34 from extending laterally, its effect is to match with a threaded brass nut 35 rotary stepping switch 10 is fixed on a kind of wall of appliances (not shown), and this mode is that personnel are familiar with in the industry.

Driving-disc 30 has a segment 36 that increases diametrically that is approximately 90 ° of angles, and this segment 36 has two relative circumferential end 36A and 36B.Article one, pearl string or chain 37 pass threaded pipe 34 and enter in the switch case 11, and its inner is fixed on the far-end 36A of segment 36 in the sagging tubular seat 38 of segment termination 36A by being bonded on one.

Helical spring 33 has upper and lower radially supporting

leg

33A and 33B, and upper supporting leg 33A is bonded on the tubular seat 38 from behind, and supporting leg 33B is clamped in and is formed in lower house partly between a pair of diametral rib 39 (Fig. 5) on 13 the diapire 13A down.Helical spring 33 makes it that driving-disc 30 is setovered towards a resting position on angle along the direction of arrow X shown in Figure 5 through prestress, abuts on the integrally formed bar 40 that hangs down from dividing plate 14 (Fig. 1) at segment termination 36A on this position.

In use, pulling chain 37 twisting action that makes driving-disc 30 resist helical spring 33 rotates along driving direction Y.When segment termination 36B meets on the lower house sidewall 13B partly that is right after in threaded pipe 34 back, driving-disc 30 will stop operating.At this moment, driving-disc 30 has rotated and has surpassed 90 ° angle slightly, and rotor 23 is because by being bonded with each other and engaging thereby also rotated same angle with driving-disc 30 formation are driven on driving direction Y between the

tooth

28 and 32.

The rotation of rotor 23 on the Y direction is not subjected to two to decide make and break contact 20B and hinder, and contact 20B is slipping on corresponding tooth 27, can recognize well from Fig. 6.When chain 37 was pulled to the terminal of its stroke, rotor 23 had changeed about 90 ° together with moving make and break contact 22, arrived a different on off state.

When discharging chain 37, driving-disc 30 is got back to its resting position along directions X under the effect of helical spring 33.Rotor is rotated on directions X by the drive of driving-disc 30 slightly by the more weak joint between

corresponding tooth

28 and 32 during beginning, but catches up with corresponding on rotor 23 peripheries and just stopped rotation when the tooth 27 that comes engages immediately when deciding make and break contact 20B.A kind ofly like this can from Fig. 6, recognize well at single direction ratchet or the stopping function decided between make and break contact 20B and the rotor tooth 27.

When the rotary driving force of helical spring 33 is relatively stronger when a lot of than the joint between

tooth

28 and 32, driving-disc 30 will be deviate from and turns over it and continue to get back to resting position along with its tooth 32 corresponding tooth 28 from the rotor 23.When getting back to its resting position, driving-disc 30 will be toward about 90 ° of revolution, and its tooth 32 is got back to the position that engages with the tooth 28 of rotor 23 again, but has stepped back a tooth.This moment, rotary stepping switch 10 was got ready for switching manipulation next time.

The present invention so far is described by way of example, for those skilled in the art person, can make various improvement and variation according to described embodiment, these improvement and variation should be included in the scope of claim defined of the present invention.

Claims

1. rotary stepping switch, it comprises a housing of partly being made up of at least two housings, an axle, one is bearing in the housing round the rotor of an axis rotation by this, a plurality of make and break contacts of deciding that are positioned at housing, a moving make and break contact that is contained on the rotor, one be bearing in the housing around this axis rotation with rotor along the direction that drives rotate in case move moving make and break contact make itself and one or more decide make and break contact electrically contact or disengage can be on angle reciprocating actuator, one is arranged on and makes the actuator one-way clutch apparatus that transmission drives step by step to rotor between actuator and the rotor, with a unidirectional retaining device that when being arranged on the inherent actuator of housing rotor is stopped operating along non-driving direction revolution, it is characterized in that in described axle and described at least two housings part one is integrally formed and be arranged to each housing partly is fixed together.

2. rotary stepping switch as claimed in claim 1 is characterized in that, described axle is arranged to pass another housing basically partly to engage with its free end.

3. rotary stepping switch as claimed in claim 2 is characterized in that, thereby the free end of described axle is swollen or is out of shape with described another housing and partly engages.

4. rotary stepping switch as claimed in claim 1 is characterized in that, described actuator is rotatably supported in described axle upward and by a spring ground biasing makes it rotate along non-driving direction.

5. rotary stepping switch as claimed in claim 1 is characterized in that, described actuator and rotor mutually directly axial engagement and having on their composition surfaces separately can cooperatively interact to constitute the appearance of described one-way clutch apparatus.

6. rotary stepping switch as claimed in claim 5 is characterized in that, the form of the gear ring that is made of adjacent asymmetric tooth is all adopted in every kind of appearance, and the corresponding appearance of actuator and rotor is complementary.

As above-mentioned claim in each described rotary stepping switch, it is characterized in that, unidirectional retaining device be by rotor with decide make and break contact at least one contact between direct engage constitute.

8. rotary stepping switch as claimed in claim 7, it is characterized in that, described rotor has the gear ring that is made of the adjacent asymmetric tooth that radially outward stretches on its periphery, and described at least one to decide make and break contact be elastically deformable, make its at rotor at actuator along engaging with the tooth that comes of catching up with of described tooth under the effect of non-driving direction.

9. rotary stepping switch as claimed in claim 8, it is characterized in that, the form of the gear ring that is made of adjacent asymmetric tooth is all adopted in every kind of appearance, the corresponding appearance of actuator and rotor is complementary, and the termination of the rotor that engages with actuator is divided into a plurality of fan-shaped sections, and each section radially increases from an end to the other end to form two gear rings with axially outside direction simultaneously gradually along non-driving direction.