Patent ID: 12222742

DESCRIPTION OF EMBODIMENTS

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of instead of all of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring toFIG.1toFIG.11, a force feedback device100is provided, including: a base1, a trigger assembly2, a driving assembly4, and a transmission medium5.

The base1is configured to mount and fix the driving assembly4and support and arrange the trigger assembly2.

The trigger assembly2includes a trigger body21, a connecting portion22extending from an end of the trigger body21close to the base1, a trigger23formed by extending from a circumferential side of the trigger body21in a direction away from the base1, and an arc portion24connected to the trigger body21. The connecting portion22is supported on the base1through a first transmission shaft3and forms a rotational connection, and the arc portion24is arranged apart and opposite to the connecting portion22and extends toward the base1. Therefore, the trigger body21can rotate on the base1by taking the connecting portion22as a rotating position.

The driving assembly4includes a driving unit41fixed to the base1and a second transmission shaft42connected to the driving unit41, and the second transmission shaft42is arranged opposite to the arc portion24. The second transmission shaft42includes a transmission shaft body421connected to the driving unit41and a spiral groove422formed on the transmission shaft body421and extending along an axial direction of the transmission shaft body421. As an improvement, the driving unit41may be a motor. The motor has stable driving and a good control effect.

The transmission medium5is arranged, in a surrounding manner, in the spiral groove422of the second transmission shaft42, and two drawn-out ends of the transmission medium5arranged to surround the second transmission shaft42respectively extend in opposite directions along a circumferential direction of the arc portion24and are fixed to two ends of the arc portion24, so that part of the transmission medium5abuts against the arc portion.

Through a connection between the spiral groove422and the transmission medium5, the transmission medium5may not slip relative to the second transmission shaft42, which facilitates the driving unit41to drive the second transmission shaft42to drive the transmission medium5to adjust the trigger23to swing to achieve a force feedback effect. An overall space is compact, and friction resistance is small, which is convenient to improve a user experience effect.

In this embodiment, the transmission medium5is a transmission rope or a transmission belt. The transmission rope or transmission belt is easy to wind, which does not require a tension holding device such as a spring during transfer of low tension, and can be directly tightened and fixed by certain tension. Due to the spiral groove422, the transmission rope may not slip relative to a rotating shaft. The entire apparatus is simple and reliable.

In this embodiment, the second transmission shaft42includes a second transmission shaft body423connected to the driving unit41and a shaft sheath424sleeved on and fixed to the second transmission shaft body423, and the spiral groove422is provided on an outer surface of the shaft sheath424. It is convenient to drive the transmission medium5to move, so as to adjust a position of the trigger23to achieve a force feedback effect.

Specifically, the spiral groove422can be directly machined on the second transmission shaft body, so that the transmission rope can be directly wound on the second transmission shaft42with the spiral groove422. A position of the spiral groove422on the second transmission shaft42or the spiral groove422on the shaft sheath is ΔL. ΔL is an end face distance from a first turn of winding to an available width of an arc surface, and the pitch P and the depth t are related to the available width L of the arc surface, the number of windings, and a diameter d of the rope. During the winding, it is required to ensure that the transmission rope is just located in the spiral groove422. A cross section of an arc groove is the same as the diameter of the transmission rope, or slightly larger, and the depth is t=d/2. Moreover, the transmission rope is required to run along the spiral groove422, and the transmission ropes at two ends bypass an end face of the arc portion along an unfolding line of a helix. In order to ensure that the transmission rope is just located in the spiral groove422and make full use of an effective width of the arc surface, there is a need to select an appropriate pitch P and adjust a relative position ΔL between the sheath and the arc surface. Through the spiral groove422, the transmission rope may not slip relative to the rotating shaft. Transmission efficiency is increased, resistance is reduced, and control over a feedback force is facilitated.

In this embodiment, the arc portion24includes an arc portion body241, a first arc structure242extending from the arc portion body241toward the base1and spaced apart from the base1, and a second arc structure243extending from the arc portion body241toward the trigger body and connected to the trigger body21, the second transmission shaft42is arranged opposite to the arc portion body241, and the two drawn-out ends of the transmission medium5arranged to surround the second transmission shaft42respectively extend along the first arc structure242and the second arc structure243and are respectively fixed to positions at ends of the first arc structure242and the second arc structure243away from each other and diagonal to each other. The arrangement of the transmission medium5is convenient, the transmission medium5may not be excessively bent, and a service life is prolonged.

In this embodiment, the arc portion further includes a stop block7, the arc portion24includes an arc portion body241, a first arc structure242extending from the arc portion body241toward the base1and spaced apart from the base1, and a second arc structure243extending from the arc portion body241toward the trigger body21and connected to the trigger body21, and the second transmission shaft42is arranged opposite to the arc portion body241. The stop block7abuts against the arc portion body241, one drawn-out end of the transmission medium5arranged to surround the second transmission shaft42extends along the second arc structure243and then is bent and fixed to the stop block7, and the other drawn-out end of the transmission medium5arranged to surround the second transmission shaft42extends along the first arc structure242and then is bent to a side of the first arc structure242away from the arc portion body241and fixed, through a screw, to the first arc structure away from the arc portion body241. It is convenient to wind and mount the transmission medium5.

It may be understood that the stop block7may be fixed to the arc portion body241or may be tightened through a transmission rope to abut against the arc portion body241. As an improvement, the transmission rope can be fixed by glue in cooperation with a perforated groove at one end of the transmission rope, the stop block7can be omitted, and the other end is tightened with a screw8after the winding is completed.

In this embodiment, two transmission mediums5are provided, and the two transmission mediums5are respectively arranged to surround the second transmission shaft42and spaced apart from each other. After the two transmission mediums5are arranged to surround the second transmission shaft42, two ends thereof close to each other are respectively fixed to the second transmission shaft42, and two ends thereof away from each other are respectively fixed to positions at sides of the first arc structure242and the second arc structure243away from each other and diagonal to each other, or two ends thereof away from each other are respectively fixed to sides of the stop block7and the first arc structure242away from the arc portion body241.

In this embodiment, two transmission mediums5are provided, and the two transmission mediums5are respectively arranged to surround the second transmission shaft42and spaced apart from each other. After the two transmission mediums5are arranged to surround the second transmission shaft42, two ends thereof away each other are respectively fixed to the second transmission shaft42, and two ends thereof close to each other are respectively fixed to positions at sides of the first arc structure242and the second arc structure243away from each other and diagonal to each other, or two ends thereof away from each other are respectively fixed to sides of the stop block7and the first arc structure242away from the arc portion body241.

In this embodiment, for example, the transmission medium5is a transmission rope, the transmission rope includes a first section51and a second section52which are arranged separately, a first end of the first section51is fixed to the arc portion24, and a second end of the first section51encircles the second transmission shaft42a plurality of coiling and is fixed to the second transmission shaft42. A first end of the second section52is fixed to the arc portion24, and a second end of the second section52encircles the second transmission shaft42a plurality of coiling and is fixed to the second transmission shaft42.

As an improvement, in order to effectively prevent slipping and ensure reliability of mounting, two other winding manners are proposed. The first one is shown inFIG.6, in which the transmission rope is divided into two sections, with one section arranged in each direction. The transmission rope may be pre-fixed to the second transmission shaft42. The second transmission shaft42herein may be a motor shaft or a sheath sleeved on the motor shaft. The transmission rope is wound around the second transmission shaft42a plurality of coiling at a certain angle (a number of coiling is determined according to a transmission angle and a transmission ratio), and then along the arc portion24, continues to be fixed to the arc portion24along a winding angle direction. So far, one section of the transmission rope has been mounted. Similarly, the other section of the transmission rope is fixed to the second transmission shaft42and the arc portion24with the same method. In this way, under a condition of no tensile creep, the transmission rope may no longer slip during the transmission and can transfer a stable force.

Further, the second winding manner is shown inFIG.7, in which the transmission rope is divided into two sections, with one section arranged in each direction. The transmission rope may be pre-fixed to the second transmission shaft42. Anchor points6herein may be placed at two ends of the second transmission shaft42, so that the transmission rope is wound in the middle of the second transmission shaft42. The transmission rope is wound around the second transmission shaft42a plurality of coiling at a certain angle (a number of coiling is determined according to a transmission angle and a transmission ratio), and then along the arc portion24, continues to be fixed to the arc portion24along an angle direction of winding. So far, one section of the transmission rope has been mounted. Similarly, the other section of the transmission rope is fixed to the second transmission shaft42and the arc portion24with the same method. In this way, under a condition of no tensile creep, the transmission rope may no longer slip during the transmission and can transfer a stable force.

In this embodiment, an end of the first arc structure242close to the base1extends to form a first limiting block244, an end of the second arc structure243close to the trigger23extends to form a second limiting block245, and the two drawn-out ends of the transmission medium5arranged to surround the second transmission shaft are respectively fixed to sides of the first limiting block244and the second limiting block245. The first limiting block244and the second limiting block245are configured to respectively restrict outward slipping of the two ends of the transmission medium5on the arc portion24, so that the transmission medium5has a good transmission effect.

In this embodiment, the force feedback device100further includes a limiting shaft10, the arc portion body241penetrates to form a limiting groove9having a waist-shaped structure, and the limiting shaft10passes through the limiting groove9and is fixed to the base1. The limiting shaft10is fixed to the base1to limit a rotation position of the arc portion body241, and safety is high.

In this embodiment, the force feedback device100further includes a torsion spring11, an end of the base1located at the first transmission shaft3is provided with a fixed portion12, the torsion spring11sleeves the fixed portion12, and two ends of the torsion spring11respectively abut against the base1and the trigger23. Elastic properties of the torsion spring11enable quick reset of the trigger23, which is easy to operate.

In this embodiment, the transmission medium5, the second transmission shaft42, and the arc portion24are integrally arranged, and two ends of the transmission medium5are respectively arranged to surround the second transmission shaft and the arc portion24.

Specifically, in order to reduce the mounting of the anchor point6, the transmission medium5(transmission rope or transmission belt), the second transmission shaft42, and the arc portion24may be regarded as an entirety, and injection molding or other processes are used to make the three into a part unit, as shown inFIG.8. The transmission medium5is flexible. A flexible portion may be wound around a driving shaft portion and the arc portion24. The driving shaft portion and the arc portion24are as close as possible to prevent excessive radial force of a driving shaft and an arc-shaped rotating shaft during transmission.FIG.8shows a pull in one direction, andFIG.9shows a pull in the other direction.FIG.8andFIG.9are assembled and combined into pulls in two directions, that is, rotation in two directions, as shown inFIG.10andFIG.11.

Compared with the related art, according to the force feedback device in the present invention, the trigger assembly is rotatably mounted on the base, the trigger assembly includes a trigger body, a connecting portion extending from an end of the trigger body close to the base, a trigger formed by extending from a circumferential side of the trigger body in a direction away from the base, and an arc portion connected to the trigger body, the connecting portion is supported on the base through a first transmission shaft and forms a rotational connection, the arc portion is arranged apart and opposite to the connecting portion and extends toward the base, the driving assembly including a driving unit fixed to the base and a second transmission shaft connected to the driving unit, and the second transmission shaft is arranged opposite to the arc portion. The second transmission shaft includes a transmission shaft body connected to the driving unit and a spiral groove formed on the transmission shaft body and extending along an axial direction of the transmission shaft body. The transmission medium is arranged, in a surrounding manner, in the spiral groove of the second transmission shaft, and two drawn-out ends of the transmission medium arranged to surround the second transmission shaft respectively extend in opposite directions along a circumferential direction of the arc portion and are fixed to two ends of the arc portion, so that part of the transmission medium abuts against the arc portion. In this way, the transmission medium is arranged to surround the second transmission shaft, and the two ends of the transmission medium extend along the arc portion and are fixed to the two ends of the arc portion. The second transmission shaft includes a transmission shaft body and a spiral groove formed on the transmission shaft body, and the transmission medium is arranged, in a surrounding manner, in the spiral groove. Through a connection between the spiral groove and the transmission medium, the transmission medium may not slip relative to the second transmission shaft, which facilitates the driving unit to drive the second transmission shaft to drive the transmission medium to adjust the trigger to swing to achieve a force feedback effect. An overall space is compact, and friction resistance is small, which is convenient to improve a user experience effect.

The above descriptions are only embodiments of the present invention. It should be pointed out herein that, for those of ordinary skill in the art, improvements can also be made without departing from the creative concept of the present invention, all of which fall within the protection scope of the present invention.