CN111942079A - NFC inductive control brake caster - Google Patents

Abstract

The invention relates to a caster, in particular to an NFC inductive control brake caster. This truckle includes the wheel carrier along transversely being equipped with the center pin, the locking motor, the brake pads, the brake lever, spring and the automatically controlled module of NFC, the wheel carrier left and right sides is equipped with the limit wheel that passes the center pin respectively, the inboard of limit wheel is equipped with the internal tooth, the outside at the brake lever is cup jointed to the spring, the brake lever is equipped with along its convex horizontal pole of side, the table side of brake pads is equipped with a plurality of external teeth, the dorsal part of brake pads and the non-extrusion of spring hold the butt from top to bottom, but the automatically controlled module of NFC is connected brake lever and locking motor transmission with the locking motor electricity is connected, so that the spring can rotate and release along with the horizontal pole. According to the invention, the trundles are controlled by NFC induction, reliable braking and locking directions can be rapidly realized for the trundles, and the realization process is simple, flexible and good in safety.

Description

NFC sensory control casters

technical field

The present invention relates to a caster, in particular to an NFC sense-controlled movable caster.

Background technique

In the prior art, a caster is generally set on each of the four feet of the hospital bed to facilitate the movement of the hospital bed, and a braking mechanism is provided at the caster to realize the braking function by external force when needed, and the hospital bed is fixed and parked. where needed. There are two existing caster braking mechanisms. One is that each of the four casters of the hospital bed has an independent brake button. When braking is required, the four corners of the hospital bed can be braked; Control casters, that is, connect the first two casters with a connecting rod, the rear two casters are also connected with a connecting rod, and then connect a connecting rod in the middle of the two connecting rods, and add a brake in the middle key to realize the function of the central control brake; the two types of brake structures have their own shortcomings, the former is troublesome, the latter requires high precision and is easy to wear, after a period of use, the braking is often inflexible, and even stuck, Failure and other problems have brought a lot of trouble to the use of hospital beds.

SUMMARY OF THE INVENTION

The invention provides an NFC sensing-controlled movable caster, which can realize the braking of the caster of a hospital bed without manpower by controlling the braking through the NFC sensing, thereby overcoming the defects of complicated braking process of the caster of the existing hospital bed and the need for manual braking.

In order to achieve the above object, the present invention discloses an NFC sensing control movable caster, which includes a wheel frame with a central axis along the lateral direction, wherein the left and right sides of the wheel frame are respectively provided with side wheels passing through the central axis, and the inner side of the side wheel is provided with side wheels. It is provided with internal teeth, and also includes a locking motor, a brake block, a brake lever, a spring and an NFC electronic control module assembled on the wheel frame, and the NFC electronic control module is electrically connected with the locking motor;

The spring is sleeved on the outer side of the brake rod, and the brake rod is provided with a transverse rod protruding along its side, so that the transverse rod and one end of the spring are pressed against each other;

The front side of the brake block is provided with a number of groups of external teeth that match the internal teeth, and the back side of the brake block is in contact with the non-extrusion end of the spring up and down;

The brake lever is driveably connected with the locking motor, so that the spring can be released with the rotation of the cross bar, so as to press-fit with the brake block and push the brake block to the inner teeth of the side wheel.

Optionally, the back side of the brake block is provided with a bracket, the inner cavity of the bracket is provided with a transverse plate, the brake rod is inserted into the bracket and penetrates the transverse plate, and the non-extrusion end of the spring is connected to the bottom side of the transverse plate. Abutting up and down.

Optionally, the wheel frame is provided with a support frame for assembling the bracket, the end of the support frame is formed with an installation opening for assembling the brake block, and the brake block extends along both sides of the installation opening to the inner sides of the two wheels.

Optionally, the locking motor is provided with a first gear, the end of the brake lever away from the brake block is provided with a second gear, and the first gear and the second gear are meshed with each other.

Optionally, the wheel frame is provided with an insertion rod cavity along the vertical direction, and the insertion rod cavity is provided with a leg rod that can rotate relative to the wheel frame.

Optionally, the NFC sensing control caster also includes a transmission rod and a rotation stop rod, one end of the transmission is driven and matched with the brake block, and the other end of the transmission rod is driven with the rotation stop rod, so that the transmission rod is pushed up with the brake block. And drive the anti-rotation rod close to and lock the pin rod.

Optionally, the bottom side of the foot rod is provided with a third gear, and one end of the anti-rotation rod close to the foot rod is in the shape of a pincer.

Optionally, the transmission rod includes a blocking part and a guiding part connected at an obtuse angle, the brake block is provided with a slot, the anti-rotation rod is provided with a guide hole, the blocking part is obliquely inserted into the slot, and the guide part is inserted through the guide hole. , so that the latching part can be pushed up and extended with the brake block, so that the guiding part can be swung in the direction of the foot rod.

Optionally, the bottom side of the rotation stop rod is provided with a limit rod, and the guide portion passes through the rotation stop rod along the guide hole and abuts with the surface side of the limit rod.

Optionally, the NFC electronic control module includes an NFC power taking unit and a control unit, the NFC power taking unit is respectively electrically connected with the control unit and the locking motor of each NFC inductive control movable caster, and the control unit is connected with the lock of each NFC inductive control movable caster. Stop the motor communication connection.

The beneficial effects of the present invention are as follows: by controlling the caster by NFC induction, the caster can be quickly braked and locked in a reliable direction without manual braking, the realization process is simple and flexible, and the safety is good.

Description of drawings

FIG. 1 is a schematic structural diagram of an NFC sensing-controlled moving caster provided by an exemplary embodiment of the present invention.

FIG. 2 is a schematic diagram of the NFC control principle of the NFC sensing-controlled moving caster provided by the embodiment of FIG. 1 .

FIG. 3 is a schematic diagram of the internal structure of the NFC sensor-controlled movable caster provided in the embodiment of FIG. 1 .

FIG. 4 is a schematic diagram of the braking and direction locking principle of the NFC sensing control caster provided in the embodiment of FIG. 1 .

FIG. 5 is a schematic structural diagram of the wheel frame provided by the embodiment of FIG. 1 .

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the present invention will be further described below with reference to the embodiments and the accompanying drawings.

Please refer to FIGS. 1-5 , which is an NFC sensing control caster provided by an exemplary embodiment of the present invention, which mainly includes a wheel frame 10 , two side wheels 20 , a brake block 30 assembled on the wheel frame 10 , a locking The motor 40 , the brake lever 50 , the spring 11 and the NFC electronic control module 90 , wherein the wheel frame 10 is provided with a central shaft 12 along its transverse direction, and the two wheels 20 are respectively rotatably installed on the left and right sides of the wheel frame 10 through the central shaft 12 . On one side, the inner side of the side wheel 20 is provided with internal teeth 21 . NFC sensor control casters are mainly used in hospital beds, which can realize NFC sensor control brake locking without manual locking.

In order to realize the brake locking, the brake block 30 is driven to expand and contract by the locking motor 40 . Specifically, the spring 11 is sleeved on the outside of the brake lever 50, and the brake lever 50 is provided with a transverse bar 51 protruding along its side, dividing the spring 11 into two sections, one section of which is the non-extrusion end, which is the same as the non-extrusion end. The back side of the brake block 30 abuts up and down, and the other part is the squeezed end, which is far away from the brake block 30 and is squeezed and contracted by the cross bar 51 at the time of non-braking; the front side of the brake block 30 is provided with several groups The outer teeth 31 matched with the inner teeth 21; the brake lever 50 and the locking motor 40 can be connected in a transmission manner, so that the spring 11 can be released or squeezed and contracted with the rotation of the cross bar 51.

The braking principle of the NFC sense-controlled caster is as follows: when the caster is in the non-braking locking state, the cross bar 51 squeezes the squeezed end of the spring 11, thereby shrinking its length, and the entire spring 11 cannot touch the brake block 30. A thrust is formed. When the caster enters the brake locking state from the non-braking locking state, the locking motor 40 drives the brake lever 50 to rotate, and the cross bar 51 rotates in the direction of releasing the squeezed end, so that the spring 11 The length of the extruded end is shortened, and the length of the non-extrusion end becomes longer, so that the spring 11 can press-fit with the brake block 30, and push the brake block 30 to the inner teeth 21 of the side wheel 20 to realize braking locking. Caster function; on the contrary, when the caster enters the non-brake locking state from the brake locking state, the locking motor 40 drives the cross bar 51 to rotate in the direction of pressing the squeezed end, so that the length of the squeezed end of the spring 11 is The length of the non-compressed end is shortened after being extended but compressed, and the spring 11 as a whole returns to a state where it cannot form a thrust to the brake block 30 .

Referring to FIG. 2 , in order to realize NFC induction controlled braking, the locking motor 40 is electrically connected to the NFC electronic control module 90 , and the NFC electronic control module 90 includes an NFC power taking unit 91 and a control unit 92 , and the NFC power taking unit 91 is connected to the control unit 92 respectively. The unit 92 is electrically connected with the locking motor 40 of each NFC sensing control caster, and the control unit 92 is connected in communication with the locking motor 40 of each NFC sensing control caster.

In actual use, each NFC sensing control caster is installed on the four sides of the hospital bed, and the user can approach the NFC power taking unit 91 and the control unit 92 by holding the NFC terminal. The NFC power taking unit 91 takes power from the NFC terminal and performs signal amplification. And supply power to the control unit 92 and the locking motor 40, the control unit 92 obtains the braking command or the braking command from the NFC terminal, so as to send a control signal to the locking motor 40 to make the locking motor 40 rotate in the braking direction or Turn in the direction of releasing the brake.

The NFC electronic control module 90 may further include an NFC antenna 93 that is electrically connected to the control unit 92 for further enhancing the signal receiving capability of the control unit 92 .

In this embodiment, a bracket 32 is provided on the back side of the brake block 30 , a transverse plate 33 is provided in the inner cavity of the bracket 32 , and the transverse plate 33 separates the bracket 32 into two cavities. The bottom of the bracket 32 is inserted and penetrated through the horizontal plate 33, the non-extrusion end of the spring 11 is in contact with the bottom side of the horizontal plate 33 up and down, and the extruded end of the spring 11 is in contact with the bottom of the bracket 32. The cross plate 33 is used to push the brake block 30 towards the side wheel 20 .

Further, in order to prevent the position of the brake pads 30 from being shifted, the wheel frame 10 is provided with a support frame 13 for assembling the bracket 32 . It can slide back and forth along the support frame 13, the brake block 30 moves with the bracket 32 in the installation port 14, and the brake block 30 extends along the two sides of the installation port 14 to the inner side of the two wheels 20, so that the brake block 30 can be braked at the same time. Tighten the wheels 20 on both sides.

In this embodiment, the locking motor 40 is provided with a first gear 41 , and the end of the brake lever 50 away from the brake block 30 is provided with a second gear 52 , the first gear 41 and the second gear 52 are meshed with each other, and the locking motor is The first gear 41 and the second gear 52 are drivingly matched with the brake lever 50 , so that the brake lever 50 can rotate in two opposite directions.

Further, the wheel frame 10 is provided with a rod cavity 15 in the vertical direction, and a pin rod 16 is arranged in the rod cavity 15. The pin rod 16 is used to connect the bed feet through the pin plate, and the pin rod 16 can be connected with the foot of the bed. The wheel frame 10 rotates relatively, so that the NFC sensing control caster has the function of a universal wheel.

In order to realize the electric locking direction, the NFC sense-controlled driving caster also includes a transmission rod 60 and a rotation stop rod 70. One end of the transmission rod 60 is driven and matched with the brake block 30, and the other end of the transmission rod 60 is driven and matched with the rotation stop rod 70. In order to make the transmission rod 60 push up with the brake block 30 , the anti-rotation rod 70 is driven to approach and lock the foot rod 16 . Specifically, the transmission rod 60 includes a blocking portion 61 and a guide portion 62 connected at an obtuse angle, the brake block 30 is provided with a slot 34 , the anti-rotation rod 70 is provided with a guide hole 71 , and the blocking portion 61 is obliquely inserted in the socket 34 Inside, the guide part 62 is inserted into the guide hole 71, so that the locking part 61 is pushed up and extended with the brake block 30, so that the guide part 62 swings along the direction of the foot rod 16; the bottom side of the anti-rotation rod 70 is provided with The limiting rod 80 , and the guide portion 62 passes through the anti-rotation rod 70 along the guide hole 71 and is in contact with the front side of the limiting rod 80 .

The principle of the locking direction of the NFC sense-controlled caster is: when the brake block 30 is pushed up to the side wheel 20 to produce a braking effect, the latching portion 61 will move along its oblique insertion direction as the brake block 30 is pushed up. When sliding out, the guide block connected at an obtuse angle with the locking portion 61 tends to swing downward as the locking portion 61 slides out. and then swings in the horizontal direction, so that the anti-rotation rod 70 is moved to the foot rod 16. The bottom side of the foot rod 16 is provided with a third gear 17, and the end of the anti-rotation rod 70 close to the foot rod 16 is clamp-shaped. , as the rotation-stop lever 70 approaches, the rotation-stop lever 70 engages and locks with the third gear 17 , and the foot lever 16 is locked in the rotational direction.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still understand the descriptions in the foregoing embodiments. The technical solution is modified, or some technical features thereof are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The NFC sensing and controlling brake caster comprises a wheel carrier (10) which is transversely provided with a central shaft (12), wherein side wheels (20) penetrating through the central shaft (12) are respectively arranged on the left side and the right side of the wheel carrier (10), inner teeth (21) are arranged on the inner sides of the side wheels (20), the NFC sensing and controlling brake caster is characterized by further comprising a brake block (30), a locking motor (40), a brake rod (50), a spring (11) and an NFC electric control module (90) which are assembled on the wheel carrier (10), and the NFC electric control module (90) is electrically connected with the locking motor (40);

the spring (11) is sleeved outside the brake rod (50), and the brake rod (50) is provided with a cross rod (51) protruding along the side of the brake rod, so that the cross rod (51) and one end of the spring (11) are mutually extruded;

the front side of the brake block (30) is provided with a plurality of groups of external teeth (31) matched with the internal teeth (21), and the back side of the brake block (30) is vertically abutted with the non-extrusion end of the spring (11);

the brake lever (50) is in transmission connection with the locking motor (40) so that the spring (11) can be released along with the rotation of the cross rod (51) to be in press fit with the brake block (30) and push the brake block (30) to the inner teeth (21) of the side wheel (20).

2. The NFC inductive-control brake caster according to claim 1, wherein a bracket (32) is arranged on the back side of the brake block (30), a transverse plate (33) is arranged in an inner cavity of the bracket (32), the brake lever (50) penetrates into the bracket (32) and penetrates through the transverse plate (33), and the non-extrusion end of the spring (11) is in up-and-down abutting contact with the bottom side of the transverse plate (33).

3. The NFC inductive brake caster according to claim 2, characterized in that the wheel carrier (10) is provided with a support frame (13) for mounting a bracket (32), the end of the support frame (13) is formed with a mounting opening (14) for mounting a brake block (30), and the brake block (30) extends along the two sides of the mounting opening (14) and inside the two side wheels (20).

4. The NFC inductive-control brake caster according to claim 1, wherein the locking motor (40) is provided with a first gear (41), the end of the brake lever (50) remote from the brake block (30) is provided with a second gear (52), and the first gear (41) and the second gear (52) are meshed with each other.

5. The NFC inductive-control brake caster wheel according to claim 1, wherein the wheel carrier (10) is provided with a peg cavity (15) in a vertical direction, and a pin rod (16) capable of rotating relative to the wheel carrier (10) is arranged in the peg cavity (15).

6. The NFC inductive-control brake caster according to claim 5, further comprising a transmission rod (60) and a rotation stop rod (70), wherein one end of the transmission rod (60) is in transmission fit with the brake block (30), and the other end of the transmission rod (60) is in transmission fit with the rotation stop rod (70), so that the transmission rod (60) drives the rotation stop rod (70) to approach and lock the pin rod (16) along with the push-up of the brake block (30).

7. The NFC inductive brake caster according to claim 6, wherein the foot bar (16) is provided at its bottom side with a third gear (17), and the end of the rotation stop lever (70) near the foot bar (16) is in the shape of a pincer.

8. The NFC inductive brake caster according to claim 6, wherein the transmission rod (60) comprises a detent portion (61) and a guide portion (62) which are connected at an obtuse angle, the brake block (30) is provided with a slot (34), the rotation stop rod (70) is provided with a guide hole (71), the detent portion (61) is obliquely inserted into the slot (34), and the guide portion (62) is inserted into the guide hole (71) so that the detent portion (61) extends out along with the push of the brake block (30) to make the guide portion (62) swing along the direction of the pin rod (16).

9. The NFC inductive-control brake caster according to claim 8, wherein a limit rod (80) is provided on the bottom side of the rotation stop rod (70), and the guide portion (62) passes through the rotation stop rod (70) along the guide hole (71) and abuts against the surface side of the limit rod (80).

10. The NFC inductive-control brake caster according to claim 8, wherein the NFC electronic control module (90) comprises an NFC power-taking unit (91) and a control unit (92), the NFC power-taking unit (91) is electrically connected with the control unit (92) and the locking motors (40) of the NFC inductive-control brake casters respectively, and the control unit (92) is in communication connection with the locking motors (40) of the NFC inductive-control brake casters.

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