CN111155839B

CN111155839B - Safety knob mechanism

Info

Publication number: CN111155839B
Application number: CN201811322387.7A
Authority: CN
Inventors: 沈永根
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2018-11-08
Filing date: 2018-11-08
Publication date: 2021-06-04
Anticipated expiration: 2038-11-08
Also published as: CN111155839A

Abstract

The invention discloses a safety knob mechanism. In the safety knob mechanism, the swing phase stroke of the limit swing arm of the knob installation barrel can be constrained to be alternatively stopped in a first limit phase and a second limit phase, and the knob push disc is mutually associated with the screwing phase stroke of the safety knob and the swing phase stroke of the limit swing arm, so that limit position constraint can be formed on the first screwing phase or the second screwing phase by utilizing any one of the first limit phase and the second limit phase, and further the safety knob can be prevented from being rotated excessively and stopped in a transition position. When the safety knob mechanism is installed, the phase of the knob push disc and the knob installation barrel can be switched and matched to adjust the limit position constraint relation so as to adapt to door leaves in different opening and closing side directions and different lockhole directions; when the safety knob mechanism is installed, the phase of the knob push disc and the knob installation barrel can be switched and matched to realize screwing of a safety locking mode.

Description

Safety knob mechanism

Technical Field

The invention relates to the field of security protection, in particular to a safety knob mechanism suitable for a door lock.

Background

The door lock can be equipped with a safety knob mechanism for safety locking of the main bolt in the locked state.

However, the actuated safety knob mechanism lacks restraint of both the screw limit positions of safety enable and safety release.

On one hand, the over-position screwing of the knob is easily caused by the constraint loss, so that a transmission part connected between the knob and the safety lock hole is twisted; on the other hand, such lack of restraint tends to cause the knob to be arrested in a transition position between the two screwing limit positions, which, when struck by an external force, may shift randomly without control to the screwing limit position of the arming, so that arming error is liable to occur.

In addition, the conventional safety knob mechanism often only supports a single door leaf opening and closing direction and a single safety tongue lock hole direction, and does not have universality.

Disclosure of Invention

An embodiment of the present invention provides a safety knob mechanism, including:

a safety knob having a screw phase travel that switches between a first screw phase and a second screw phase;

the periphery of the knob mounting cylinder is provided with a limiting swing arm, and the swing phase stroke of the limiting swing arm is constrained to be alternatively and stably stopped in a first limit phase and a second limit phase;

the knob push disc is in synchronous transmission connection with the safety knob, in addition, the knob push disc and the knob installation barrel are in phase-switchable constraint fit, and the first limit phase and the second limit phase form limit position constraint on the first screwing phase or the second screwing phase through any one of the first limit phase and the second limit phase.

Optionally, further comprising:

a back plate having a first limit stop disposed at the first limit phase, a second limit stop disposed at the second limit phase, and a mounting post;

the bistable elastic component is arranged between the mounting column and the limit swing arm and generates elastic force for pressing the limit swing arm against the first limit stop or the second limit stop.

Optionally, the knob thrust plate releases the switching travel between the switchable mating phases by an axial offset relative to the knob mounting barrel.

Optionally, further comprising:

and the axial elastic component is arranged on the knob installation barrel and generates axial elastic force for inhibiting axial deviation on the knob push disc.

Optionally, the outer wall of the knob push plate has a lug, and the inner wall of the knob mounting barrel has a first axial groove, a second axial groove, and a circumferential rotation groove, wherein the circumferential rotation groove is arranged at an end of the first axial groove and the second axial groove opposite to the direction of the axial elastic force to provide the switching stroke for switching the lug between the first axial groove and the second axial groove.

Optionally, further comprising:

the knob shifting piece is connected between the safety knob and the safety tongue locking hole so as to form mapping between a safety starting phase and a safety releasing phase of the safety tongue locking hole and the first screwing phase and the second screwing phase.

Alternatively,

the screwing phase stroke and the swinging phase stroke are synchronously associated through the engagement of the lug and the first axial groove and reversely interfere through the engagement of the lug and the second axial groove; or

The screw phase stroke and the swing phase stroke are synchronously associated by the fitting of the lug with the second axial groove, and reversely interfere by the fitting of the lug with the first axial groove.

Optionally, the rotating shaft of the safety knob is provided with a plectrum slot for clamping the knob plectrum and a pin hole for fixing the knob plectrum in the plectrum slot by a fixing pin.

Optionally, the knob pushing plate is provided with a shaft hole for the rotating shaft to pass through, and a rib wall clamped with the shifting piece slot is arranged in the shaft hole.

Optionally, the screwing phase stroke, the swinging phase stroke, and the switching stroke between the switchable mating phases have equal phase amplitudes.

As can be seen from the above, in the safety knob mechanism provided in the above embodiment, the swing phase stroke of the limit swing arm of the knob mounting barrel may be constrained to be stably stopped in either the first limit phase or the second limit phase, and the knob push plate may form the limit position constraint on the first screwing phase or the second screwing phase by using either the first limit phase or the second limit phase by correlating the screwing phase stroke of the safety knob with the swing phase stroke of the limit swing arm, so that the safety knob may be prevented from being rotated excessively and stopped in the transition position. When the safety knob mechanism is installed, the phase of the knob push disc and the knob installation barrel can be switched and matched to adjust the limit position constraint relation so as to adapt to door leaves in different opening and closing side directions and different lockhole directions; when the safety knob mechanism is installed, the phase of the knob push disc and the knob installation barrel can be switched and matched to realize screwing of a safety locking mode, so that safety is prevented from being started by mistake or relieved by mistake.

Drawings

FIGS. 1a and 1b are schematic exploded views of a safety knob mechanism according to an embodiment of the present invention;

FIGS. 2a and 2b are schematic views illustrating an assembly structure of a safety knob mechanism according to an embodiment of the present invention;

FIGS. 3a and 3b are cross-sectional views of FIGS. 2a and 2b, respectively;

FIG. 4 is a schematic illustration of the phase travel of the safety knob mechanism in one embodiment of the present invention;

FIG. 5 is a schematic diagram of the phase shift of the assembly of the safety knob mechanism in one embodiment of the present invention;

FIG. 6 is a schematic diagram of the switching state of the safety knob mechanism based on the switching principle shown in FIG. 7 according to an embodiment of the present invention;

FIGS. 7 a-7 d are schematic views illustrating a conventional screwing mode of a safety knob mechanism according to an embodiment of the present invention;

fig. 8 is a schematic view illustrating a locking screw mode of the safety knob mechanism according to an embodiment of the present invention.

Description of the reference numerals

10 backboard

100 backboard shaft hole

11 first limit stop

12 second limit stop

13 mounting post

130 set screw

20 safety knob

21 rotating shaft

211 poking piece slot

212 pinhole

22 shaft shoulder

30 knob mounting cylinder

31 limit swing arm

310 connecting hole

32 pressure spring mounting groove

33 first axial groove

34 second axial groove

35 circumferential rotating groove

40 bistable torsion spring

41 annular socket end

42 bending plug end

50 knob push plate

500 gasket

51 push disk shaft hole

510 ribbed wall

52 push plate sleeve

53 convex lug

60 axial compression spring

70 knob plectrum

80 fixed pin

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.

Fig. 1a and 1b are exploded views of a safety knob mechanism according to an embodiment of the present invention. Fig. 2a and 2b are schematic views illustrating an assembly structure of a safety knob mechanism according to an embodiment of the present invention. Fig. 3a and 3b are cross-sectional views of fig. 2a and 2b, respectively. Fig. 4 is a schematic diagram of the phase travel of the safety knob mechanism in one embodiment of the present invention.

Referring to fig. 1a and 1b, fig. 2a and 2b, fig. 3a and 3b, and fig. 4, in one embodiment, a safety knob mechanism includes: the safety knob comprises a back plate 10, a safety knob 20, a knob mounting barrel 30, a bistable torsion spring 40, a knob pushing disc 50, an axial compression spring 60, a knob shifting piece 70 and a fixing pin 80.

The safety knob 20 is located on the front side of the back plate 10, and the safety knob 20 has a screw phase stroke that switches between a first screw phase Pha _ h (horizontal phase) and a second screw phase Pha _ v (vertical phase).

The back plate 10 has a back plate shaft hole 100 penetrating front and rear surfaces. The rotation shaft 21 of the safety knob 20 passes through the backboard shaft hole 100 to the rear surface side of the backboard 10. A shoulder 22 between the safety knob 20 and the rotation shaft 21 abuts on the front surface of the backplate 10 to achieve a limit. The knob mounting cylinder 30 and the knob push plate 50 are located on the rear surface side of the back plate 10, the rotating shaft 21, which is also located on the rear surface side of the back plate 10, penetrates the knob mounting cylinder 30 and the knob push plate 50, and the rotating shaft 21 has a dial plate insertion groove 211 that sandwiches the knob dial plate 70, and a pin hole 212 through which a fixing pin 80 (e.g., a cotter pin) fixes the knob dial plate 70 in the dial plate insertion groove 211. The knob driver 70 may be connected between the safety knob 20 and the safety tongue lock hole, so that the screw phase stroke of the safety knob 20 may be restricted between the first screw phase Pha _ h and the second screw phase Pha _ v by the safety tongue lock hole.

The knob mounting tube 30 has a limit swing arm 31 on the outer periphery thereof, and the swing phase stroke of the limit swing arm 31 is constrained to be alternately and stably stopped in a first limit phase S1 and a second limit phase S2.

Specifically, the rear surface of the back plate 10 has a first limit stopper 11 provided at the first limit phase S1, and a second limit stopper 12 provided at the second limit phase S2, the first limit stopper 11 and the second limit stopper 12 being used to achieve the limit at the corresponding limit phases by blocking the limit swing arm 31. The rear surface of the backboard 10 is further provided with a bistable torsion spring 40, the annular sleeve end 41 of the bistable torsion spring 40 is sleeved on the mounting column 13 and is extruded and fixed by the fixing screw 130 screwed on the mounting column 13, and the bent insertion end 42 of the bistable torsion spring 40 is inserted into the connecting hole of the limit swing arm 31. Thus, the bistable torsion spring 40 can generate an elastic force for pressing the swing limit arm 31 against the first limit stopper 11 or the second limit stopper 12. It will be appreciated that the bistable torsion spring 40 may be replaced by other bistable resilient members.

The knob pushing plate 50 is connected with the safety knob 20 in a synchronous transmission mode, and the knob pushing plate 50 is in phase-switchable constrained fit with the knob mounting barrel 30.

Specifically, the knob tray 50 has a tray shaft hole 51 through which the rotation shaft 21 of the safety knob 20 passes, and the tray shaft hole 51 has a rib wall 510 engaged with the paddle insertion groove 211. Thus, the knob tray 50 and the safety knob 20 can be synchronously connected.

Furthermore, the knob push plate 50 has a push plate sleeve 52 inserted in the knob mounting barrel 30, and the outer wall of the push plate sleeve 52 has a lug 53. Accordingly, the inner wall of the knob mounting tube 30 has a first axial groove 33, a second axial groove 34, and a circumferential rotation groove 35, wherein the lug 53 of the knob push plate 50 can be fitted in either one of the first axial groove 33 and the second axial groove 34. That is, the fitting phase between the knob push plate 50 and the knob mounting sleeve 30 is switchable.

The axial compression spring 60 is mounted in the compression spring mounting groove 32 of the knob sleeve 30 to generate an axial elastic force on the knob tray 50, and the elastic force causes the lug 53 to be stably fitted in the first axial groove 33 or the second axial groove 34. It will be appreciated that the axial compression spring 60 may alternatively be other axially resilient members.

The circumferential rotation groove 35 is arranged at one end of the first axial groove 33 and the second axial groove 34 opposite to the direction of the axial elastic force, and the lug 53 can enter the circumferential rotation groove 35 after the knob push plate 50 is subjected to an external force overcoming the axial elastic force and switch between the first axial groove 33 and the second axial groove 34 through the circumferential rotation groove 35. The external force applied to the knob tray 50 against the axial elastic force may be a pulling force applied to the safety knob 20 in a direction away from the back plate 10.

Fig. 5 is a schematic diagram of the phase shifting of the assembly of the safety knob mechanism in one embodiment of the present invention. Fig. 6 is a schematic structural diagram of a switching state of the safety knob mechanism based on the switching principle shown in fig. 7 according to an embodiment of the present invention. Referring to fig. 5 and 6, the pulling force applied to the safety knob 20 in the direction away from the back plate 10 can cause the knob pushing plate 50 to generate an axial offset E _ sw in the direction close to the back plate 10 relative to the knob mounting cylinder 30, and the knob pushing plate 50 can release the switching stroke of the lug 53 between the first axial groove 33 and the second axial groove 34 by the axial offset E _ sw relative to the knob mounting cylinder 30. The switching travel can be actuated by rotation of the securing knob 20, since the axial deflection E _ sw is suppressed by the axial spring force generated by the axial compression spring 60, so that the lugs 53 automatically enter the first and second

axial grooves

33, 34 which are currently aligned as soon as the pulling force applied to the securing knob 20 disappears.

The screwing phase stroke of the safety knob 20, the swing phase stroke of the limit swing arm 31, and the above-described phase switching stroke (phase difference between the first axial groove 33 and the second axial groove 34) have equal phase amplitudes, for example, a phase amplitude of 90 degrees.

In addition, as can be seen from the drawings, the first axial groove 33 is a through groove penetrating through the knob mounting cylinder 30, and the second axial groove 34 extends partially to the side of the knob mounting cylinder 30 facing the back plate 10, but actually, the main functions of the first axial groove 33 and the second axial groove 34 are to achieve the phase constraint between the knob push plate 50 and the knob sleeve 30, and the first axial groove 33 is provided as a through groove only to provide the assembling entrance for assembling the knob push plate 50 to the knob mounting cylinder 30.

Since the knob push plate 50 is in synchronous drive connection with the safety knob 20, no matter which of the first axial groove 33 and the second axial groove 34 of the knob mounting tube 30 the lug 53 of the knob push plate 50 is fitted in, the knob push plate 50 can correlate the screwing phase stroke of the safety knob 20 with the swing phase stroke of the limit swing arm 31 of the knob mounting tube 30 based on the phase constraint generated by the fitting between the knob push plate 50 and the knob mounting tube 30, thereby forming the limit position constraint on the first screwing phase Pha _ h or the second screwing phase Pha _ v by using either one of the first limit phase S1 and the second limit phase S2.

By limiting the position, over-rotation of the safety knob 20 and stagnation in the transitional position can be avoided.

The specific relationship of the extreme position constraints described above may be determined based on the following factors: the mapping mode of the limit phase of the safety lock tongue and the first screwing phase phah and the second screwing phase phav of the safety knob 20 and the matching phase of the knob push plate 50 and the knob mounting barrel 30.

By switching the lug 53 between the first axial groove 33 and the second axial groove 34, the above-described relationship of the limit position constraint can be set arbitrarily at the time of installation of the safety knob mechanism, and also can be switched in adjustment during use after installation.

The setting during installation is to match the opening and closing side direction of the door leaf and the direction of the safety tongue locking hole, and the switching adjustment during use is to switch between the normal screwing mode and the locking screwing mode.

For the conventional screwing mode, when the lug 53 is fitted in each of the first axial groove 33 and the second axial groove 34, the screwing phase stroke of the safety knob 20 is associated synchronously with the swing phase stroke of the limit swing arm 31, i.e., the screwing phase stroke and the swing phase stroke have stroke margins synchronized in the same direction;

and for the locking knob mode:

when the lug 53 is fitted in one of the first axial groove 33 and the second axial groove 34, the screw phase stroke and the swing phase stroke have stroke margins synchronized in the same direction;

when the lug 53 is fitted in the other of the first axial groove 33 and the second axial groove 34, the stroke margin synchronized in the same direction is consumed by the safety knob 20 alone, thereby causing reverse interference between the screw phase stroke of the safety knob 20 and the swing phase stroke of the limit swing arm 31, that is, the stroke margins of the screw phase stroke and the swing phase stroke are mutually reversely repelled.

Accordingly, the switching travel provided by the circumferential rotary groove 35 and released by the axial offset E _ sw can be considered as an adaptation commissioning process during installation, as well as a screwing travel of the locking knob mode.

Fig. 7a to 7d are schematic views illustrating a conventional screwing mode of the safety knob mechanism according to an embodiment of the present invention.

In fig. 7a, the first screw phase Pha _ h is mapped to the arming phase Pha _ rls of the arming lock hole, the second screw phase Pha _ v is mapped to the arming lock phase Pha _ lock of the arming lock hole, and the fitting phase between the knob push plate 50 and the knob mounting barrel 30 where the lug 53 is fitted to the first axial slot 33 is selected, so that the first limit phase S1 forms the limit phase constraint for the horizontal arming phase Pha _ rls and the second limit phase S2 forms the limit phase constraint for the vertical arming lock phase Pha _ lock. Based on such extreme phase constraints, arming of the horizontal phase to the vertical phase in the counterclockwise direction, and arming of the reverse direction can be formed.

In fig. 7b, the first screw phase Pha _ h is mapped to the safety lock phase Pha _ lock of the safety lock hole, the second screw phase Pha _ v is mapped to the safety release phase Pha _ rls of the safety lock hole, and the fitting phase between the knob push plate 50 and the knob mounting tube 30 where the second axial groove 34 is fitted with the lug 53 is selected, so that the first limit phase S1 forms the limit phase constraint for the vertical safety release phase Pha _ rls, and the second limit phase S2 forms the limit phase constraint for the horizontal safety lock phase Pha _ lock. Based on such extreme phase constraints, arming of the vertical phase to the horizontal phase in the counterclockwise direction, and arming of the reverse direction can be formed.

In fig. 7c, the first screw phase Pha _ h is mapped to the arming phase Pha _ rls of the arming lock hole, the second screw phase Pha _ v is mapped to the arming lock phase Pha _ lock of the arming lock hole, and the fitting phase between the knob push plate 50 and the knob mounting barrel 30 is selected in which the lug 53 is fitted in the second axial groove 34, so that the first limit phase S1 forms the limit phase constraint on the arming lock phase Pha _ lock, and the second limit phase S2 forms the limit phase constraint on the arming lock phase Pha _ rls. Based on such extreme phase constraints, a clockwise horizontal phase to vertical phase arming, and a reverse arming can be formed.

In fig. 7d, the first screw phase Pha _ h is mapped to the safety lock phase Pha _ lock of the safety lock hole, the second screw phase Pha _ v is mapped to the safety release phase Pha _ rls of the safety lock hole, and the fitting phase between the knob push plate 50 and the knob mounting tube 30 in which the first axial groove 33 is fitted with the lug 53 is selected, so that the first limit phase S1 forms the limit phase constraint on the safety lock phase Pha _ lock, and the second limit phase S2 forms the limit phase constraint on the safety release phase Pha _ rls. Based on such extreme phase constraints, a clockwise vertical phase to horizontal phase arming, and a reverse arming can be formed.

As can be seen from the above, the limit phase constraint relationship can be adjusted by the phase-switchable cooperation between the knob push plate 50 and the knob mounting barrel 30, so that, when the safety knob mechanism in the above embodiment is installed, the phase-switchable cooperation between the knob push plate 50 and the knob mounting barrel 30 can be adapted to door leaves with different opening and closing side orientations and different keyhole orientations.

In fig. 8, the extreme phase constraint relationship of fig. 7a is used as an example. The knob push plate 50 in fig. 8 releases the switching stroke by the axial offset E _ sw, and the safety knob 20 achieves safety activation of the horizontal phase to the vertical phase in the counterclockwise direction by rotation independently of the knob mounting tube 30, in which the lug 53 of the knob push plate 50 is switched from being fitted with the first axial groove 33 to being fitted with the second axial groove 34. Since the safety knob 20 independently consumes the stroke margin which is originally shared synchronously with the knob mounting tube 30 in the process of starting the safety, after the process of starting the safety, the screwing phase stroke of the safety knob 20 and the stroke margin of the swinging phase stroke of the limit swing arm 31 of the knob mounting tube 30 are mutually exclusive in the opposite direction, so that the locking after starting the safety is realized.

In the limit phase constraint relationships of fig. 7b to 7d, the locking of the safety locking system can also be achieved by the safety knob 20 alone consuming the stroke margin.

As can be seen from the above, the safety knob 20 can consume the stroke margin by the phase-switchable cooperation between the knob push plate 50 and the knob mounting barrel 30 alone, so that, when the safety knob mechanism in the above embodiment is used, the phase-switchable cooperation between the knob push plate 50 and the knob mounting barrel 30 can realize the screwing of the safety lock manner to avoid the safety mis-activation or the safety mis-release.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A safety knob mechanism, comprising:

a safety knob (20), a rotating shaft (21) of the safety knob (20) is provided with a plectrum slot (211), and the safety knob (20) is provided with a screwing phase stroke which is switched between a first screwing phase (Pha _ h) and a second screwing phase (Pha _ v);

a knob mounting tube (30) having a limit swing arm (31) on the outer periphery of the knob mounting tube (30), the swing phase stroke of the limit swing arm (31) being constrained to be statically stopped alternatively in a first limit phase (S1) and a second limit phase (S2);

a knob push plate (50), wherein the knob push plate (50) is provided with a shaft hole (51) for the rotating shaft (21) to pass through, the shaft hole (51) is provided with a rib wall (510) engaged with the plectrum inserting groove (211) to be synchronously connected with the safety knob (20) in a transmission manner, and the knob push plate (50) and the knob mounting barrel (30) are in phase-switchable constraint fit, so that any one of the first limit phase (S1) and the second limit phase (S2) forms limit position constraint on the first screwing phase (Pha _ h) or the second screwing phase (Pha _ v).

2. The safety knob mechanism according to claim 1, further comprising:

a back plate (10), the back plate (10) having a first limit stop (11) disposed at the first limit phase (S1), a second limit stop (12) disposed at the second limit phase (S2)), and a mounting post (13);

the bistable elastic component (40) is arranged between the mounting column (13) and the limit swing arm (31) and generates elastic force for pressing the limit swing arm (31) against the first limit stop (11) or the second limit stop (12).

3. Safety knob mechanism according to claim 1, characterized in that the knob push plate (50) releases the switching travel between the switchable mating phases by an axial offset (E _ sw) with respect to the knob mounting barrel (30).

4. The safety knob mechanism according to claim 3, further comprising:

and an axial elastic member (60) that is attached to the knob mounting tube (30) and that generates an axial elastic force that suppresses axial displacement (E _ sw) of the knob push plate (50).

5. A safety knob mechanism according to claim 4, characterized in that the outer wall of the knob push plate (50) has a lug (53), and the inner wall of the knob mounting barrel (30) has a first axial groove (33), a second axial groove (34), and a circumferential rotation groove (35), wherein the circumferential rotation groove (35) is arranged at an end of the first axial groove (33) and the second axial groove (34) opposite to the direction of the axial elastic force to provide the switching stroke of the lug (53) between the first axial groove (33) and the second axial groove (34).

6. The safety knob mechanism according to claim 5, further comprising:

a knob dial (70), the knob dial (70) being connected between the safety knob (20) and a safety tongue locking hole to form a mapping between a safety enabling phase and a safety disabling phase of the safety tongue locking hole and the first screwing phase (Pha _ h) and the second screwing phase (Pha _ v).

7. A safety knob mechanism according to claim 6,

the screwing phase stroke and the swinging phase stroke are synchronously associated through the engagement of the lug (53) and the first axial groove (33) and reversely interfere through the engagement of the lug (53) and the second axial groove (34); or

The screwing phase stroke and the swinging phase stroke are synchronously associated through the engagement of the lug (53) and the second axial groove (34), and reversely interfere through the engagement of the lug (53) and the first axial groove (33).

8. A safety knob mechanism according to claim 6, wherein the knob driver (70) is clamped by a driver slot (211) of a rotating shaft (21) of the safety knob (20), the rotating shaft (21) having a pin hole (212) for a fixing pin (80) to fix the knob driver (70) in the driver slot (211).

9. The safety knob mechanism according to any one of claims 1 to 8, wherein the screwing phase stroke, the swinging phase stroke, and the switching stroke between switchable mating phases have equal phase amplitudes.