Handheld instrument

Abstract

The present application relates to a handheld instrument. The handheld instrument comprises a first housing, a second housing and limiting members. The first housing is rotationally connected with the second housing. At least part of the limiting members can move relative to at least one of the first housing and the second housing, so as to enable the limiting members to at least have a first state and a second state. In the first state, the limiting members can limit relative rotation between the first housing and the second housing, and in the second state, the first housing and the second housing can rotate relatively. The handheld instrument of the present application has the function of adjusting the operation angle, making the difficulty of operation of the handheld instrument low, and improving the use experience of users.

Description

A handheld device

[0001] This application claims priority to patent application number 202322507355.7, whose patent name is "A handheld device" and application date is September 14, 2023. The entire content of the above patent application is incorporated into this application by reference. Technical Field

[0002] The present application relates to the technical field of human-machine assistive devices, and in particular to a handheld device. Background Art

[0003] Minimally invasive surgery refers to puncturing the human body surface to form several surgical channels, and then using surgical instruments to reach into the patient's body and perform surgical operations on the lesions.

[0004] In the prior art, surgical instruments include an instrument body and an actuator. A doctor holds the instrument body to insert the actuator into the patient's body and perform a surgical operation.

[0005] However, the structure of the instrument body in the prior art is relatively fixed, and the doctor needs to coordinate the movement of the hands and / or arms when operating the instrument body. That is, the instrument body in the prior art is relatively difficult for the doctor to operate, and the doctor's user experience is poor.

[0006] Application Contents

[0007] The present application provides a handheld device, which has a function of adjusting the handheld operation angle. The handheld device has low operating difficulty and high user experience.

[0008] The present application provides a handheld device, which includes a first shell, a second shell and a limiter. The first shell is rotatably connected to the second shell. At least a portion of the limiter can move relative to at least one of the first shell and the second shell, so that the limiter has at least a first state and a second state. In the first state, the limiter can limit the relative rotation between the first shell and the second shell, and in the second state, the first shell and the second shell can rotate relative to each other. In the second state, at least one of the first shell and the second shell is used to be manually operated by the user (for example, actions that can be performed by the hand such as holding or lifting).

[0009] In the present application, when the retaining member is in the first state, the first and second shells are restrained by the retaining member, and the first and second shells cannot rotate relative to each other. In other words, the first and second shells are relatively fixed. The stable structure of the first and second shells facilitates the user to reliably operate the handheld device. When the user needs to adjust the operating angle, the user can operate the retaining member from the first state to the second state, and the first and second shells are no longer restrained by the retaining member, allowing the first and second shells to rotate relative to each other. When the first and second shells are rotated to the desired angle, the user can operate the retaining member from the second state to the first state, and the first and second shells are again restrained by the retaining member. In other words, the first and second shells are again relatively fixed, and the user can once again reliably operate the handheld device. Therefore, the user can adjust the structural angle between the first and second shells of the handheld device of the present application to adapt to the operating angle required by the operating channel in different positions without having to significantly adjust the wrist, arm, or shoulder to adjust the operating angle. The user can operate the handheld device in a more comfortable posture, which means that the user's operating intensity is low, and the user experience is better.

[0010] Optionally, the limit member is movably connected to the first shell, and in the first state, the first shell is clamped to the second shell through the limit member, and in the second state, the second shell is separated from the limit member, and / or the limit member is movably connected to the second shell, and in the first state, the second shell is clamped to the first shell through the limit member, and in the second state, the first shell is separated from the limit member.

[0011] The handheld device includes a first housing, a second housing, and a limiting member. The second housing is rotatably connected to the first housing, and at least one of the first and second housings is configured to be manually operated by a user. The limiting member is movably connected to the first housing and / or the limiting member is movably connected to the second housing, so that the limiting member has at least a first state and a second state; wherein, in the first state, the limiting member can limit relative rotation between the first and second housings, and in the second state, the limiting member is separated from the first housing and / or the limiting member is separated from the second housing, so that relative rotation between the first and second housings is possible.

[0012] When the retaining member is in the first state, the first and second shells are restrained by the retaining member, preventing relative rotation between them. This means the first and second shells are relatively fixed, and the stable structures of the first and second shells facilitate reliable operation of the handheld device. When the user needs to adjust the operating angle, the user can operate the retaining member from the first preset position to the second preset position, causing the retaining member to transition from the first state to the second state. The first and second shells are no longer restrained by the retaining member, allowing relative rotation between them. When the first and second shells rotate to the desired angle, the user can operate the retaining member again from the second preset position to the first preset position, causing the retaining member to transition from the second state to the first state. The first and second shells are again restrained by the retaining member, meaning they are relatively fixed again, allowing the user to reliably operate the handheld device. Therefore, the user can adjust the structural angle between the first and second shells of the handheld device of the present invention to accommodate the operating angle required by operating channels at different positions without having to significantly adjust their wrists, arms, or shoulders. The user can operate the handheld device in a more comfortable posture, resulting in less manual effort and a better user experience.

[0013] Optionally, the position-limiting member is movably connected to the first shell, and one of the protrusions of the position-limiting member and the second shell includes one or at least two protrusions spaced apart around the rotation axis, and the other is provided with a recessed portion or at least two recessed portions spaced apart around the rotation axis. In the first state, the protrusion is located within the recessed portion, and in the second state, the protrusion is located outside the recessed portion. And / or, the position-limiting member is movably connected to the second shell, and one of the position-limiting member and the first shell includes one protrusion or at least two protrusions spaced apart around the rotation axis, and the other is provided with one recessed portion or at least two recessed portions spaced apart around the rotation axis. In the first state, the protrusion is located within the recessed portion, and in the second state, the protrusion is located outside the recessed portion.

[0014] Optionally, if at least three recessed portions are provided, the interval distance between every two recessed portions is the same.

[0015] Optionally, the handheld device further includes an elastic member, one end of the elastic member is connected to the first shell, and the other end of the elastic member is connected to the limiting member, and under the elastic force of the elastic member, the limiting member is in the first state.

[0016] Optionally, either one of the first shell and the limiting member is provided with a sliding groove, and the other includes a sliding portion, and the sliding portion is slidably engaged with the sliding groove.

[0017] Optionally, the limiting member includes an operating portion located outside the first shell and / or outside the second shell.

[0018] Optionally, the handheld device includes a handle, a connecting arm and a first driving member, the handle includes a handle head and a handle body, the handle head is connected to the first driving member, the handle body is connected to the connecting arm, the handle head is the first shell, and the handle body is the second shell.

[0019] Optionally, the handheld device further includes an actuator and a connecting wire, and the first driving member is connected to the actuator via the connecting wire (directly or indirectly); the connecting wire includes a relaxed state and a tensioned state, and in the tensioned state, the actuator can be controlled by the connecting wire.

[0020] Optionally, the handheld instrument includes a handle, a connecting arm and a second driving member, the handle is connected to the second driving member, the handle is the first shell, and the connecting arm is the second shell.

[0021] Optionally, the handheld instrument also includes an end face toothed disc, a first transmission shaft and an actuator, the second driving member is rotatably connected to the handle, the end face toothed disc is rotatably connected to the handle, the first transmission shaft is rotatably connected to the connecting arm, the second driving member is engaged with the end face toothed disc gear, the first transmission shaft is engaged with the end face toothed disc gear, and the first transmission shaft is connected to the actuator (directly or indirectly).

[0022] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of a handheld device provided by the present application in a specific embodiment, wherein the handheld device is in a first posture;

[0024] FIG2 is a schematic structural diagram of a handheld device provided by the present application in a specific embodiment, wherein the handheld device is in a second posture;

[0025] FIG3 is a schematic diagram of the assembly structure of the handle, the first driving member, the first limiting member, the first elastic member, and the connecting wire, wherein only a partial structure of the handle is shown;

[0026] FIG4 is a schematic diagram of the assembly structure of the handle, the first limiting member, and the first elastic member, wherein the first limiting member is in the first state and only a partial structure of the handle is shown;

[0027] FIG5 is a schematic diagram of the assembly structure of the handle, the first limiting member, and the first elastic member, wherein the first limiting member is in the second state and only a partial structure of the handle is shown;

[0028] Figure 6 is a schematic diagram of the partial structure of the handle;

[0029] FIG7 is a schematic structural diagram of the handle from another perspective;

[0030] FIG8 is a schematic diagram of the exploded structure of the handle head, the handle body, the first limiting member and the first elastic member;

[0031] FIG9 is a schematic diagram of the partial structure of the handle from another perspective;

[0032] FIG10 is a schematic diagram of the assembly structure of the handle, the connecting arm, the first limiting member, the second limiting member, and the second driving member;

[0033] FIG11 is an assembly cross-sectional view of the handle, the connecting arm, and the second limiting member, wherein the second limiting member is in the first state;

[0034] FIG12 is an assembled cross-sectional view of the handle, the connecting arm, and the second limiting member, wherein the second limiting member is in the second state;

[0035] FIG13a is a schematic diagram of the exploded structure of the handle, the connecting arm, the first limiting member, the first elastic member, the second limiting member, and the second elastic member;

[0036] FIG13b is a schematic diagram of the exploded structure of the handle, the connecting arm, the first limiting member, the first elastic member, the second limiting member, and the second elastic member from another perspective;

[0037] FIG14 is a schematic diagram of a partial structure of a connecting arm;

[0038] FIG15 is a schematic structural diagram of a first position-limiting member;

[0039] FIG16 is a schematic structural diagram of the first limiting member from another perspective;

[0040] FIG17 is a schematic structural diagram of a second limiting member;

[0041] Figure 18 is a schematic structural diagram of the handle;

[0042] FIG19 is a schematic structural diagram of the second limiting member from another perspective;

[0043] Figure 20 is an assembly structure view of the handle, connecting arm, first transmission shaft, end face gear plate and second driving member, in which only the partial structure of the handle and connecting arm is shown.

[0044] Reference numerals:

[0045] 10-Handheld instruments;

[0046] 1-handle;

[0047] 11- handle;

[0048] 111-first chute;

[0049] 111a-Part I;

[0050] 111b-Part II;

[0051] 111c-Part III;

[0052] 112-first annular groove;

[0053] 113-first accommodating chamber;

[0054] 114-first opening;

[0055] 115-Second opening;

[0056] 116-the third opening;

[0057] 117-The fourth opening;

[0058] 118-first blocking portion;

[0059] 12-handle body;

[0060] 121- first recessed portion;

[0061] 122-second chute;

[0062] 123-first annular protrusion;

[0063] 124- second accommodating chamber;

[0064] 125-Fifth opening;

[0065] 126-fifth recess;

[0066] 127-sixth recess;

[0067] 128-second bearing;

[0068] 129-Sixth opening;

[0069] 2-connecting arm;

[0070] 21- second recessed portion;

[0071] 22-The seventh opening;

[0072] 23-first bearing;

[0073] 24-The eighth opening;

[0074] 25- third accommodating chamber;

[0075] 26- fourth accommodating chamber;

[0076] 27- second annular protrusion;

[0077] 28-third annular protrusion;

[0078] 31- first limiter;

[0079] 311-first sliding portion;

[0080] 312-first protrusion;

[0081] 312a-first chamfered portion;

[0082] 313-first operating unit;

[0083] 314-third raised portion;

[0084] 315-third recessed portion;

[0085] 316-first positioning column;

[0086] 32- second limiting member;

[0087] 321-shaft shoulder;

[0088] 322- second raised portion;

[0089] 322a-second chamfered portion;

[0090] 323-second sliding portion;

[0091] 324-second operating unit;

[0092] 325- fourth recess;

[0093] 326-second positioning column;

[0094] 41-first elastic member;

[0095] 42- second elastic member;

[0096] 51-first driving member;

[0097] 511-third operating unit;

[0098] 52- second driving member;

[0099] 521-fourth operating unit;

[0100] 522-second transmission shaft;

[0101] 61-connecting wire;

[0102] 62-first transmission shaft;

[0103] 63-end face gear disc;

[0104] 7-bending adjustment component;

[0105] 8-Executive document.

[0106] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0107] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0108] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0109] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0110] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0111] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0112] The handheld devices of the embodiments of the present application can assist users in performing precision operations. For example, in the medical field, doctors can use handheld devices to perform minimally invasive surgical procedures. In the field of equipment technology, technicians can use handheld devices to disassemble, assemble, and process equipment. In the field of biochemistry, experimenters can use handheld devices to operate research objects in specific environments. In other words, handheld devices can replace the user's hands to indirectly operate the object. The following content of this article mainly describes handheld devices used in the medical field as an example.

[0113] Minimally invasive surgery refers to the use of puncturing a living body to form several surgical channels or using naturally formed channels in the living body to allow a handheld instrument located outside the body to pass through the surgical channels or naturally formed channels into the living body and perform surgical operations on the lesions in the body. Due to the different locations of the patient's lesions (for example, lesions located in the abdominal cavity, thoracic cavity, pelvic cavity, joint cavity, nasal cavity, oral cavity, urethra or intestine), the locations of the channels used for handheld instruments to penetrate are also different, and accordingly, the required surgical operation angles are also different. Based on this, an embodiment of the present application provides a handheld instrument with adjustable surgical operation angles. Referring to Figures 1-2, the handheld instrument 10 of the embodiment of the present application may include a handle 1, a connecting arm 2, a driving member, a bending adjustment component 7 and an actuator 8. The driving member is connected to the handle 1, the handle 1 is connected to the connecting arm 2, the connecting arm 2 is connected to the bending adjustment component 7, and the bending adjustment component 7 is connected to the actuator 8. During actual use, the user (doctor, nurse or other medical personnel) needs to hold the handle 1 so that the actuator 8 and at least part of the bending adjustment component 7 enter the patient's body through the surgical channel in sequence, and the connecting arm 2, handle 1 and driving member are located outside the body. The user can operate the driving member to make the bending adjustment component 7 bend inside the patient's body (any one or combination of pitch and deflection), and / or, operate the driving member to make the actuator 8 perform surgical operations such as shearing, clamping, holding a needle, suturing, hemostasis or cutting. The structure of the handle 1 and / or the structure of the connecting arm 2 located outside the body is mainly a shell structure. The handheld instrument 10 of the embodiment of the present application is mainly innovative in the shell structure so that the handheld instrument 10 has the function of adjusting the surgical operation angle. This part of the content will be mainly introduced later in this article.

[0114] The handheld device 10 of the embodiment of the present application includes a first shell, a second shell and a limiter. The first shell is rotatably connected to the second shell. At least a portion of the limiter can move relative to at least one of the first shell and the second shell, so that the limiter has at least a first state and a second state. In the first state, the limiter can limit the relative rotation between the first shell and the second shell, and in the second state, the first shell and the second shell can rotate relative to each other. In the second state, at least one of the first shell and the second shell is used to be manually operated by the user (for example, actions that can be performed by the hand such as holding or lifting).

[0115] In this embodiment, when the retaining member is in the first state, the first and second housings are restrained by the retaining member, preventing relative rotation between them. Specifically, the first and second housings are relatively fixed, and the stable structures of the first and second housings facilitate reliable operation of the handheld instrument by the user. When the user needs to adjust the surgical operating angle, the user can operate the retaining member from the first state to the second state, freeing the first and second housings from the retaining member and enabling relative rotation between them. When the first and second housings are rotated to the desired angle, the user can operate the retaining member from the second state to the first state, re-restraining the first and second housings by the retaining member. Specifically, the first and second housings are relatively fixed again, allowing the user to reliably operate the handheld instrument. Therefore, the user can adjust the structural angle between the first and second housings of the handheld instrument of this embodiment to accommodate the surgical operating angle required by different surgical channels without having to significantly adjust their wrist, arm, or shoulder to adjust the surgical operating angle. The user can operate the handheld instrument in a more comfortable posture, resulting in less surgical effort and a better user experience.

[0116] Alternatively, referring to FIG2 , taking the handle 1 as an example, the handle 1 includes a handle head 11 and a handle body 12, which are rotatably connected. The driver includes a first driver 51, with the handle head 11 connected to the first driver 51 and the handle body 12 connected to the connecting arm 2. Both the handle head 11 and the handle body 12 are shell structures, meaning the handle head 11 can be equivalent to the first shell, and the handle body 12 can be equivalent to the second shell. Referring to FIG3 , the handheld device 10 of this embodiment may also include a first stopper 31, which is equivalent to the stopper described above. As shown in FIG4 , when the first stopper 31 is in the first position, the handle head 11 and the handle body 12 are restrained by the stopper 3, preventing relative rotation between the handle head 11 and the handle body 12. During an actual surgical procedure, the user may operate the handle 1 and the connected first driver 51 with either their right hand or their left hand. Due to the different structures of the right and left hands, the required operating angles for the first driver 51 are also different. The user can operate the first limiting member 31 to transition from the first state shown in FIG. 4 to the second state shown in FIG. 5 . The handle head 11 and the handle body 12 are no longer restricted by the limiting member 3 . The user can then operate the handle head 11 to rotate relative to the handle body 12 about the transfer axis O1 , thereby adjusting the position of the first driving member 51 relative to the handle body 12 . The user then operates the first limiting member 31 to transition from the second state shown in FIG. 5 to the first state shown in FIG. 4 , thereby re-fixing the structure between the handle head 11 and the handle body 12 . This allows both the right and left hands of the user to more comfortably operate the first driving member 51 . Furthermore, due to the varying hand sizes and gripping habits of different users, the user can adjust the rotation angle of the handle head 11 relative to the handle body 12 to position the first driving member 51 in the optimal operating position desired by the user. Therefore, the above arrangement can reduce the user's surgical operating intensity and provide a superior user experience.

[0117] The handle 12 is longer than the handle head 11. The user can use the palm, thumb, middle finger, ring finger, and pinky finger to firmly control the handle 12, and the user can use the index finger to control the first driving member 51. Alternatively, the user can use the palm, index finger, middle finger, ring finger, and pinky finger to firmly control the handle 12, and the user can use the thumb to control the first driving member 51.

[0118] In addition, the handle head 11 can be rotatably connected to the end of the handle body 12 facing away from the connecting arm 2, and the outer wall of the handle head 11 can be provided with a first annular groove 112 (as shown in Figures 6-7), and the inner wall of the handle body 12 can include a first annular protrusion 123 (as shown in Figures 8-9). The curved side wall of the first annular protrusion 123 can abut against the curved side wall of the handle body 12 used to enclose the first annular groove 112 to form a rotational connection relationship between the handle head 11 and the handle body 12; the first annular protrusion 123 is embedded in the first annular groove 112, which can limit the separation of the handle head 11 and the handle body 12.

[0119] Furthermore, as shown in Figure 1, the handle head 11 rotates relative to the handle body 12 around the rotation axis O1, and the rotation axis O1 can be set along the length direction of the handle body 12. The embodiment of the present application does not limit the specific value of the angle of rotation of the handle head 11 relative to the handle body 12. The rotatable angle can be 0°~180°, specifically 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, and 180°.

[0120] Optionally, please refer to Figure 10, taking the handle 1 and the connecting arm 2 as an example, the handle 1 and the connecting arm 2 are rotatably connected, the driving member includes a second driving member 52, and the handle 1 is used to connect to the second driving member 52. The handle 1 and the connecting arm 2 are both shell structures, that is, the handle 1 can be equivalent to the first shell of the above content, and the connecting arm 2 can be equivalent to the second shell of the above content. The handheld instrument 10 of the embodiment of the present application may also include a second limiting member 32 equivalent to the limiting member described above. Please refer to Figure 11, when the second limiting member 32 is in the first state, the handle 1 and the connecting arm 2 are limited by the second limiting member 32, and the handle 1 and the connecting arm 2 cannot rotate relative to each other. During actual surgery, the surgical operation angles required for different surgical channel positions are different. The user can operate the second limiter 32 to change from the first state (as shown in FIG11 ) to the second state (as shown in FIG12 ), and the handle 1 and the connecting arm 2 are not limited by the second limiter 32. The user can operate the handle 1 and the connecting arm 2 to rotate relative to each other to adjust the structural angle (for example, the angle α) between the handle 1 and the connecting arm 2. The user can then operate the second limiter 32 to change from the second state to the first state to fix the structure between the handle 1 and the connecting arm 2 again, so that the user can adjust the surgical operation angle without having to adjust the wrist, arm and shoulder significantly, thereby reducing the user's surgical operation intensity and providing a better user experience.

[0121] Furthermore, during non-surgical time, the user can reduce the angle α between the handle 1 and the connecting arm 2 to make the structure between the handle 1 and the connecting arm 2 more compact. Accordingly, the handheld device 10 requires less storage space, is easy to store, and provides a better user experience.

[0122] The angle α can range from 0° to 180° (excluding 0°), and can specifically be 30°, 40°, 45°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, or 180°. The user can change the angle α according to the desired surgical operation angle.

[0123] Furthermore, as shown in Figures 13a and 13b, the connecting arm 2 can be rotatably connected to the end of the handle body 12 of the handle 1 that faces away from the handle head 11. The connecting arm 2 can include two spliced ​​shell structures to enclose and form a third accommodating cavity 25 and a fourth accommodating cavity 26 that are interconnected, as shown in Figure 14. The end of the handle body 12 that faces away from the handle head 11 is located within the third accommodating cavity 25, and the two oppositely disposed inner side walls of the connecting arm 2 can be rotatably connected to the two oppositely disposed outer side walls of the handle body 12 of the handle 1. Equivalently, the end of the handle body 12 that faces away from the handle head 11 is clamped by the connecting arm 2. In detail, as shown in Figures 11 and 12, the inner side wall of the connecting arm 2 includes a second annular protrusion 27. As shown in Figures 13a and 13b, the handle body 12 is provided with a cylindrical fifth recess 126. The curved sidewall of the second annular protrusion 27 can abut against the curved sidewall of the handle body 12 that encloses the fifth recess 126, thereby forming a rotational connection between the connecting arm 2 and the handle body 12. The handle body 12 is provided with a second annular groove (not shown in the figures). Referring to Figures 11 and 12, the inner sidewall of the connecting arm 2 also includes a raised third annular protrusion 28. The curved sidewall of the third annular protrusion 28 abuts against the curved sidewall of the handle body 12 that encloses the second annular groove, thereby forming a rotational connection between the connecting arm 2 and the handle body 12. In the connecting arm 2, the second annular protrusion 27 and the third annular protrusion 28 are arranged opposite each other.

[0124] Optionally, the limiting member is movably connected to the first shell. In the first state, the first shell is engaged with the second shell via the limiting member. In the second state, the second shell is separated from the limiting member.

[0125] In this embodiment, the limiting member can be moved relative to the first housing to a first preset position, so that the limiting member is in a first state, and the first housing can be engaged with the second housing via the limiting member to limit relative rotation between the first and second housings. The limiting member can be moved relative to the first housing to a second preset position, so that the limiting member is in a second state, and the limiting member is separated from the second housing, so that the limiting member no longer has a limiting effect on the first and second housings, and the first and second housings can rotate relative to each other.

[0126] Optionally, the limiting member is movably connected to the second shell. In the first state, the second shell is engaged with the first shell via the limiting member. In the second state, the first shell is separated from the limiting member.

[0127] In this embodiment, the limiting member can be moved relative to the second housing to a first preset position, so that the limiting member is in the first state, and the second housing can be engaged with the first housing via the limiting member to limit relative rotation between the first and second housings. The limiting member can be moved relative to the second housing to a second preset position, so that the limiting member is in the second state, and the limiting member is separated from the first housing, and the limiting member has no limiting effect on the first and second housings, and the first and second housings can rotate relative to each other.

[0128] In other embodiments (not shown), the stopper may be integrally formed with the first housing, and a portion of the stopper may be displaced relative to the second housing to switch the stopper between the first state and the second state. Alternatively, the stopper may be integrally formed with the second housing, and a portion of the stopper may be displaced relative to the first housing to switch the stopper between the first state and the second state.

[0129] The following content of this article mainly describes the movable connection between the limiting member and the first shell as an example.

[0130] Alternatively, taking the example of a rotational connection between the crown 11 and the handle 12, the first stopper 31 may be movably connected to the crown 11. As shown in FIG4 , in a first state, the first stopper 31 is connected to the handle 12, thereby limiting relative rotation between the crown 11 and the handle 12. As shown in FIG5 , in a second state, the first stopper 31 is separated from the handle 12, allowing relative rotation between the crown 11 and the handle 12.

[0131] In other embodiments (not shown in the figures), the first limiting member 31 may be movably connected to the handle body 12 .

[0132] In other embodiments (not shown in the figures), the first limiting member 31 can be movably connected not only to the handle head 11 , but also to the handle body 12 .

[0133] The following content of this article mainly describes the movable connection between the first limiting member 31 and the handle head 11 as an example.

[0134] Alternatively, taking the rotational connection between the handle 1 and the connecting arm 2 as an example, the second stopper 32 may be movably connected to the handle 1. As shown in FIG11 , in a first state, the second stopper 32 is connected to the connecting arm 2, thereby limiting the relative rotation between the handle 1 and the connecting arm 2. As shown in FIG12 , in a second state, the second stopper 32 is separated from the connecting arm 2, allowing the handle 1 and the connecting arm 2 to rotate relative to each other.

[0135] In other embodiments (not shown in the figures), the second limiting member 32 may be movably connected to the connecting arm 2 .

[0136] In other embodiments (not shown in the figures), the second limiting member 32 can be movably connected to the handle 1 or the connecting arm 2.

[0137] The following content of this article mainly describes the movable connection between the second limiting member 32 and the handle 1 as an example.

[0138] Optionally, the stopper is movably connected to the first housing, and either the stopper or the second housing includes a protrusion or at least two protrusions spaced apart about the rotation axis, and the other includes a recess or at least two recesses spaced apart about the rotation axis. In a first state, the protrusion is located within the recess, and in a second state, the protrusion is located outside the recess.

[0139] In this embodiment, when the user operates the limit member to move to the first preset position, the raised portion of the limit member can be located within the recessed portion provided in the second shell, and the sidewalls of the raised portion can abut against the sidewalls of the second shell that enclose the recessed portion to form a limiting effect, that is, the limit member can limit the relative rotation between the first shell and the second shell. When the user operates the limit member to move to the second preset position, the raised portion can be located outside the recessed portion, and the sidewalls of the raised portion can be separated from the sidewalls of the second shell that enclose the recessed portion. The limit member no longer has a limiting effect on the first shell and the second shell, that is, the first shell and the second shell can rotate relative to each other. With this arrangement, the user can more easily change the state of the limit member, and the user experience is improved.

[0140] Among them, the number of raised parts can be one, the number of recessed parts can be at least two, and the recessed parts are spaced apart around the rotation axis; or the number of raised parts can be at least two, and the raised parts are spaced apart around the rotation axis, and the number of recessed parts can be one; or the number of raised parts can be at least two, and the raised parts are spaced apart around the rotation axis, and the number of recessed parts can be at least two, and the recessed parts are spaced apart around the rotation axis. The above three situations regarding the number of raised parts and recessed parts can all meet the user's needs for adjusting the surgical angle. The embodiment of the present application does not limit the spacing distance between each two adjacent raised parts, nor does it limit the spacing distance between each two adjacent recessed parts.

[0141] In other embodiments (not shown), the stopper may include a hook structure, and the second housing may also include a hook structure. When the user operates the stopper to move to a first preset position, the two hooks engage, i.e., the stopper is in a first state; when the user operates the stopper to move to a second preset position, the two hooks separate, i.e., the stopper is in a second state.

[0142] Optionally, the stopper is movably connected to the second housing, and either the stopper or the first housing includes a protrusion or at least two protrusions spaced apart about the rotation axis, and the other includes a recess or at least two recesses spaced apart about the rotation axis; in a first state, the protrusion is located within the recess, and in a second state, the protrusion is located outside the recess. The technical effects of this embodiment are the same as those of the embodiment described above in which the stopper is movably connected to the first housing, and are not further described here.

[0143] The following content of this article mainly introduces the example of the movable connection between the limiting member and the first shell and the provision of at least two recessed portions in the second shell.

[0144] Alternatively, referring to Figures 3-4 , taking the example of a rotational connection between the crown 11 and the handle body 12, the first stopper 31 is movably connected to the crown 11. As shown in Figure 9 , the handle body 12 is provided with at least two first recesses 121 spaced apart about the rotation axis O1. As shown in Figures 15-16 , the first stopper 31 includes a first protrusion 312. When a user operates the first stopper 31 to move relative to the crown 11 to a predetermined position (as shown in Figure 4 ), the first protrusion 312 (as shown in Figure 15 ) of the first stopper 31 is located within the first recess 121 (as shown in Figure 9 ). The sidewalls of the first protrusion 312 abut against the sidewalls of the handle body 12 that enclose the first recess 121, thereby forming a limiting function. In other words, the first stopper 31 can limit relative rotation between the crown 11 and the handle body 12. When the user operates the first limiting member 31 to move to another preset position relative to the handle head 11 (the position shown in Figure 5), the first protrusion 312 is located outside the first recessed portion 121, and the side wall of the first protrusion 312 is separated from the side wall of the handle body 12 used to enclose the first recessed portion 121. The first limiting member 31 has no limiting effect on the handle head 11 and the handle body 12, that is, the handle head 11 and the handle body 12 can rotate relative to each other, so that the user can adjust the position of the first driving member 51 connected to the handle head 11 relative to the handle body 12.

[0145] The exterior of the crown 11 may include a position marker (not shown), and the exterior of the handle body 12 may include at least two angle markers (not shown). Alternatively, the exterior of the crown 11 may include at least two angle markers (not shown), and the exterior of the handle body 12 may include a position marker (not shown). Each time the first protrusion 312 engages with a different first recess 121, the position marker may correspond to a different angle marker. In this configuration, the user can quickly determine the rotation angle of the crown 11 relative to the handle body 12.

[0146] Alternatively, referring to Figures 13a-13b, taking the rotational connection between the handle 1 and the connecting arm 2 as an example, the second limiting member 32 is movably connected to the handle 1. Referring to Figure 14, the connecting arm 2 is provided with at least two second recessed portions 21 spaced apart around the rotation axis O2. Referring to Figure 17, the second limiting member 32 includes at least two second protrusions 322 spaced apart around the rotation axis O2. When the user operates the second limiting member 32 to move relative to the handle 1 to a preset position (the position shown in Figure 11), the second protrusion 322 of the second limiting member 32 is located within the second recessed portion 21 provided in the connecting arm 2, and the sidewall of the second protrusion 322 can abut against the sidewall of the connecting arm 2 used to enclose the second recessed portion 21 to form a limiting effect, that is, the second limiting member 32 can limit the relative rotation between the handle 1 and the connecting arm 2. When the user operates the second limit member 32 to move to another preset position relative to the handle 1 (the position shown in Figure 12), the second protrusion 322 is located outside the second recessed portion 21, and the side wall of the second protrusion 322 is separated from the side wall of the connecting arm 2 used to enclose the second recessed portion 21. The second limit member 32 has no limiting effect on the handle 1 and the connecting arm 2, that is, the handle 1 and the connecting arm 2 can rotate relative to each other, so that the user can adjust the structural angle (angle α) between the handle 1 and the connecting arm 2.

[0147] At least a portion of the second protrusion 322 is in the shape of a triangular prism, and correspondingly, at least a portion of the second recess 21 is in the shape of a triangular prism.

[0148] In addition, the exterior of the handle 1 may include a position marker (not shown), and the exterior of the connecting arm 2 may include at least two angle markers (not shown), or the exterior of the handle 1 may include at least two angle markers (not shown), and the exterior of the connecting arm 2 may include a position marker (not shown). Each time the second protrusion 322 engages with a different second recess 21, the position marker may correspond to a different angle marker. In this configuration, the user can quickly confirm the rotation angle of the handle 1 relative to the connecting arm 2.

[0149] Optionally, if at least three recesses are provided, the spacing between each two recesses is the same. In this configuration, each time the protrusion rotates from one recess to an adjacent recess, the first housing can rotate relative to the second housing by a preset unit angle (e.g., 5°, 10°, 20°, or 30°). The user can rotate the protrusion to a recessed portion at a preset position according to the preset angle value, i.e., the angle of rotation of the first housing relative to the second housing is the angle desired by the user.

[0150] In other embodiments (not shown in the figures), if at least three recessed portions are provided, the spacing distance between each two recessed portions may be different, and the spacing distance between each two recessed portions may be set according to the user's practical habits.

[0151] In other embodiments (not shown), the first and second housings can be continuously rotated with each other (the first and second housings are connected only by rotation, without the protrusions and recesses), and the stopper is threadedly connected to the first housing. After the user adjusts the first housing relative to the second housing to a predetermined rotation angle, the user screws the stopper to press against the second housing, generating static friction between the stopper and the second housing. Thus, the first housing is self-locked with the second housing via the stopper, thereby limiting relative rotation between the first and second housings.

[0152] In other embodiments (not shown), the first and second housings can be continuously rotated with each other (the first and second housings are connected by rotation only, without the protrusions and recesses), and the stopper is threadedly connected to the second housing. After the user adjusts the first housing relative to the second housing to a predetermined rotation angle, the user screws the stopper to press against the first housing, generating static friction between the stopper and the first housing. Thus, the second housing is self-locked with the first housing via the stopper, thereby limiting relative rotation between the first and second housings.

[0153] In other embodiments (not shown in the figures), the rotation angle between the first shell and the second shell can be adjusted steplessly (the first shell and the second shell are only connected in rotation, and no protrusions and recesses are provided), and the limit member can be a clamping structure or an embracing structure. In the first state, the limit member can apply a force to squeeze the first shell to the second shell, or the limit member can apply a force to squeeze the second shell to the first shell, so that static friction is generated between the first shell and the second shell, thereby limiting the rotation between the first shell and the second shell; in the second state, the limit member does not apply a force to the first shell or the second shell, so that the first shell and the second shell can rotate relative to each other.

[0154] The following content of this article mainly takes the example of a stepped rotation angle between the first shell and the second shell (providing a protrusion and at least three recesses) and takes the example of the same spacing distance between every two recesses to describe.

[0155] Alternatively, as shown in FIG9 , if the handle 12 is provided with at least three first recesses 121, the spacing between every two first recesses 121 is the same. Alternatively, as shown in FIG14 , if the connecting arm 2 is provided with at least three second recesses 21, the spacing between every two second recesses 21 is the same.

[0156] Optionally, the edge of the end surface of the protrusion facing the recessed portion is provided with a chamfered portion. With this arrangement, when the user adjusts the position of the protrusion of the stopper in the second state so that the protrusion is adapted to engage with another recessed portion, the chamfered portion can abut against the corner of the sidewall of the second housing that encloses the recessed portion, reducing the likelihood of the chamfered portion and the corner becoming stuck. In other words, the protrusion can re-enter each recessed portion more smoothly. Therefore, this arrangement can enhance the user experience.

[0157] The embodiment of the present application does not limit the structural type and size of the chamfered portion.

[0158] Referring to FIG15 , taking the first stopper 31 as an example, the first stopper 31 may include a first chamfered portion 312a, which may be rounded or chamfered at a right angle. Referring to FIG17 , taking the second stopper 32 as an example, the second stopper 32 may include a second chamfered portion 322a, which may be rounded or chamfered at a right angle.

[0159] In other embodiments, the corners of the sidewalls of the second housing that enclose the recessed portions can be chamfered. When the protrusion enters the recessed portion, the chamfered portion can abut against the protrusion, reducing the likelihood of the chamfered portion and the protrusion getting stuck. That is, the protrusion can re-enter the recessed portions more smoothly. Therefore, this arrangement can also improve the user experience.

[0160] The following content of this article mainly describes the example in which the edge of the end surface of the protruding portion facing the recessed portion is provided with a chamfered portion.

[0161] Optionally, the handheld device of the embodiment of the present application further includes an elastic member, one end of the elastic member is connected to the first shell, and the other end of the elastic member is connected to the limiting member, so that the limiting member is in the first state under the elastic force of the elastic member.

[0162] In this embodiment, when a user applies a force to the limiter, the limiter can be moved relative to the first shell and the limiter can be transformed from the first state to the second state. During this process, the elastic member is squeezed and deformed by the first shell and the limiter, and elastic potential energy is accumulated. When the user removes the force applied to the limiter, the elastic force of the elastic member can push the limiter to move relative to the first shell, so that the limiter can be transformed from the second state to the first state, and the protrusion and the recess can cooperate, thereby limiting the relative rotation between the first shell and the second shell. Therefore, the above-mentioned configuration of utilizing the elastic potential energy of the elastic member can simplify the process of user operation of the limiter, and the user experience is improved.

[0163] When the stopper is in the first state, the elastic member can still be in a compressed state, that is, the elastic member still exerts a stable elastic force on the stopper, so that the protrusion of the stopper is not easily separated from the recessed portion, thereby improving the reliability of the stopper's limiting effect. Therefore, the handheld device of the embodiment of the present application has a high degree of operating reliability.

[0164] In other embodiments, when a user applies a force to the limiter to cause the limiter to move relative to the first housing and transition from the first state to the second state, the elastic member can be stretched and deformed by the first housing and the limiter and accumulate elastic potential energy; when the user removes the force applied to the limiter, the elastic member can pull the limiter back relative to the first housing under the elastic force of the elastic member, causing the limiter to transition from the second state to the first state, and causing the protrusion to cooperate with the recess, thereby limiting the relative rotation between the first housing and the second housing. Therefore, the above-mentioned arrangement of utilizing the elastic potential energy of the elastic member can simplify the process of user operation of the limiter, and provide a higher user experience. Specifically, when the limiter is in the first state, the elastic member is still in a stretched state, that is, the elastic member still exerts a stable elastic force on the limiter, so that the protrusion of the limiter is not easily separated from the recess, thereby improving the working reliability of the limiter's limiting action. Therefore, the handheld device of the embodiment of the present application has a higher working reliability.

[0165] The following content of this article mainly describes the deformation of the elastic member by the limiting member and the first shell as an example.

[0166] Alternatively, referring to Figures 3-5 , taking the rotational connection between the handle head 11 and the handle body 12 as an example, the handheld device 10 of this embodiment of the present application includes a first elastic member 41, one end of which is connected to the handle head 11, and the other end of which is connected to the first stopper 31. As shown in Figure 5 , when a user presses the first stopper 31, the first protrusion 312 of the first stopper 31 disengages from the first recess 121 provided in the handle body 12. Simultaneously, the first elastic member 41 is deformed by the first stopper 31 and the handle head 11. The user can then operate the handle head 11 and the handle body 12 to rotate relative to each other and align the first protrusion 312 with the other first recess 121. After alignment, the user can release the pressure on the first stopper 31. 4 , the first protrusion 312 is pushed into the other first recess 121 by the elastic force of the first elastic member 41 , so that the first limiting member 31 is back in the first state to limit the relative rotation between the handle head 11 and the handle body 12 .

[0167] The first elastic member 41 may be a spring, a spring sheet, a silicone rubber or other elastic parts.

[0168] Alternatively, referring to Figures 11-13b , taking the rotational connection between the handle 1 and the connecting arm 2 as an example, the handheld device 10 of this embodiment includes a second elastic member 42, one end of which is connected to the handle 1, and the other end of which is connected to the second stopper 32. As shown in Figure 12 , when a user presses the second stopper 32, the second protrusion 322 of the second stopper 32 disengages from the second recess 21 provided in the connecting arm 2. Simultaneously, the second elastic member 42 is deformed by the second stopper 32 and the handle 1. The user can then rotate the handle 1 and the connecting arm 2 relative to each other, aligning the second protrusion 322 with the other second recess 21. After alignment, the user can release the pressure on the second stopper 32. As shown in Figure 11 , the second protrusion 322 is pushed into the other second recess 21 by the elastic force of the second elastic member 42, returning the second stopper 32 to the first state, thereby limiting relative rotation between the handle 1 and the connecting arm 2.

[0169] The second elastic member 42 may be a spring, a spring sheet, a silicone rubber or other elastic parts.

[0170] Optionally, either the first housing or the position limiting member is provided with a slide groove, and the other includes a sliding portion that slidably engages with the slide groove. Under this arrangement, the first housing and the position limiting member can be slidably connected, and the position limiting member can slide relative to the first housing and switch between the first state and the second state.

[0171] In other embodiments (not shown), the first housing and the position-limiting member may be rotatably connected, and the position-limiting member may rotate relative to the first housing and switch between the first state and the second state. Alternatively, the second housing and the position-limiting member may be rotatably connected, and the position-limiting member may rotate relative to the second housing and switch between the first state and the second state.

[0172] The following content of this article mainly describes the sliding connection between the first shell and the limiting member as an example.

[0173] Optionally, taking the rotational connection between the handle head 11 and the handle body 12 of the handle 1 as an example, please refer to Figures 6-7, the handle head 11 is provided with a first sliding groove 111, please refer to Figures 15-16, the first limiting member 31 includes a first sliding portion 311, and the first sliding portion 311 slides in cooperation with the first sliding groove 111. Under this setting, the handle head 11 and the first limiting member 31 can be slidably connected, and the first limiting member 31 can slide relative to the handle head 11 and switch between the first state and the second state.

[0174] As shown in FIG7 , the bottom wall of the handle 11 that encloses the first sliding groove 111 can be used to abut against the end of the first elastic member 41 facing away from the first stopper 31. As shown in FIG16 , a third recess 315 can be provided on the surface of the first sliding portion 311 that faces the first sliding groove 111. The first stopper 31 can also include a first positioning post 316 that protrudes from the bottom wall of the first stopper 31 that encloses the third recess 315. The first elastic member 41 can be a spring that can be fitted around the first positioning post 316 and abut against the bottom wall of the first stopper 31 that encloses the third recess 315.

[0175] As shown in Figure 6 , the first sliding groove 111 includes a first portion 111a, a second portion 111b, and a third portion 111c, which are sequentially connected. The first portion 111a is located on one side of the second portion 111b, and the third portion 111c is located on the other side of the second portion 111b. The second portion 111b is connected to a first opening 114 provided in the crown 11. The first sliding portion 311, shown in Figure 15 , can slide within the second portion 111b, as shown in Figure 6 . The first protrusion 312, shown in Figure 15 , can slide within the third portion 111c, as shown in Figure 6 . As shown in Figure 15 , the first protrusion 312 is connected to one side of the first sliding portion 311. The first stopper 31 also includes a third protrusion 314, which protrudes from the first sliding portion 311 away from the first protrusion 312 and can slide within the first portion 111a. As shown in Figure 6 , the crown 11 includes two opposing first retaining portions 118. One of the first blocking portions 118 can abut against the first protrusion 312, and the other first blocking portion 118 can abut against the third protrusion 314, thereby preventing the first limiting member 31 from disengaging from the first sliding groove 111. The third portion 111c is also connected to the first opening 114, and the first opening 114 can be aligned with each of the first recesses 121, so that the first protrusion 312 located in the third portion 111c can move through the first opening 114 into the first recess 121. The length of the first protrusion 312 is greater than that of the third protrusion 314, so that the first protrusion 312 has both a portion that abuts against the first blocking portion 118 and a portion that mates with the first recess 121.

[0176] In other embodiments (not shown in the figures), the handle head 11 may include a sliding portion, the first limiting member 31 may be provided with a sliding groove, and the sliding portion and the sliding groove may be slidably matched to enable the handle head 11 and the first limiting member 31 to be slidably connected.

[0177] The following description will be mainly based on an example in which the handle 11 is provided with the first sliding groove 111 and an example in which the first limiting member 31 includes the first sliding portion 311 .

[0178] Optionally, taking the rotational connection between the handle 1 and the connecting arm 2 as an example, please refer to Figure 18, the handle 1 is provided with a second slide groove 122, please refer to Figure 19, the second limiting member 32 includes a second sliding portion 323, please refer to Figure 12, the second sliding portion 323 slides with the second slide groove 122. Under this setting, the handle 1 and the second limiting member 32 can be slidably connected, and the second limiting member 32 can slide relative to the handle 1 and switch between the first state (as shown in Figure 11) and the second state (as shown in Figure 12).

[0179] As shown in FIG11 , the bottom wall of the handle 1 that encloses the second chute 122 can be configured to abut against the end of the second elastic member 42 facing away from the second stopper 32. As shown in FIG19 , a fourth recess 325 can be provided on the surface of the second sliding portion 323 that faces the second chute 122. The second stopper 32 can also include a second positioning post 326 that protrudes from the bottom wall of the second stopper 32 that encloses the fourth recess 325. As shown in FIG11 , the second elastic member 42 can be a spring that can be sleeved onto the second positioning post 326. The end of the second elastic member 42 that faces away from the second chute 122 abuts against the bottom wall of the second stopper 32 that encloses the fourth recess 325. Please refer to Figure 18, the bottom wall of the handle 1 for enclosing and forming the first slide groove 111 is provided with a sixth recessed portion 127, and at least a portion of the second positioning column 326 can extend into the sixth recessed portion 127 or extend from the sixth recessed portion 127. Under this arrangement, the structure between the handle 1 and the second limit member 32 is highly compact, so that the handheld device 10 is smaller in size, convenient for user operation, and provides a higher user experience.

[0180] In addition, please refer to Figure 18, the shape of the second sliding portion 323 is adapted to the shape of the second slide groove 122, and at least a portion of the second slide groove 122 can be prism-shaped (for example, a triangular prism or a quadrangular prism). Correspondingly, at least a portion of the second sliding portion 323 is also prism-shaped (for example, a triangular prism or a quadrangular prism). Under this setting, the rotation of the second limit member 32 relative to the handle 1 around the rotation axis O2 can be limited.

[0181] 17 and 19 , the second limiting member 32 may further include a shoulder 321 having a cylindrical shape, a second protrusion 322 connected to one end face of the shoulder 321, and a second sliding portion 323 connected to the other end face of the shoulder 321. As shown in FIG18 , the handle 1 is provided with a fifth recessed portion 126, and the second slide groove 122 is provided in the handle 1 to enclose and form the bottom wall of the fifth recessed portion 126. The shoulder 321 can slide along the rotation axis O2 within the fifth recessed portion 126. In a first state, the end face of the shoulder 321 connected to the second protrusion 322 can abut against the connecting arm 2. In a second state, the end face of the shoulder 321 connected to the second sliding portion 323 can abut against the bottom wall of the handle 1 used to enclose and form the fifth recessed portion 126. The second annular protrusion 27 can be sleeved on the curved sidewall of the shaft shoulder 321 to form a rotatable connection between the second annular protrusion 27 and the shaft shoulder 321 .

[0182] In other embodiments (not shown in the figures), the handle 1 may include a sliding portion, the second limiting member 32 may be provided with a sliding groove, and the sliding portion and the sliding groove may be slidably matched to enable the handle 1 and the second limiting member 32 to be slidably connected.

[0183] The following content of this article is mainly described by taking the example that the handle 1 is provided with the second sliding groove 122 and the example that the second limiting member 32 includes the second sliding portion 323.

[0184] Optionally, the position-limiting member includes an operating portion located outside the first shell and / or outside the second shell. When the user's hand presses the operating portion, the position-limiting member can be moved from a first preset position to a second preset position relative to the first shell and / or the second shell, thereby switching the position-limiting member from the first state to the second state; when the user's hand releases the pressure on the operating portion or pulls back the operating portion, the position-limiting member can be moved from the second preset position to the first preset position relative to the first shell and / or the second shell, thereby switching the position-limiting member from the second state to the first state.

[0185] Optionally, taking the rotational connection between the handle head 11 and the handle body 12 of the handle 1 as an example, please refer to Figure 15, the first limiting member 31 includes a first operating part 313 located outside the handle head 11, and the user's hand can operate the first operating part 313 to change the first limiting member 31 between the first state and the second state.

[0186] The first operating portion 313 may be a surface of the first limiting member 31 facing away from the crown 11. A user may press the first operating portion 313 to place the first limiting member 31 in the second state. In conjunction with the above-described embodiment of the first elastic member 41, when the user releases the pressure on the first operating portion 313, the elastic force of the first elastic member 41 causes the first limiting member 31 to move away from the crown 11, thereby placing the first limiting member 31 in the first state.

[0187] Optionally, taking the rotational connection between the handle 1 and the connecting arm 2 as an example, please refer to Figure 17, the second limit member 32 includes a second operating part 324 located outside the handle 1 and outside the connecting arm 2, and the user's hand can operate the second operating part 324 to change the second limit member 32 between the first state and the second state.

[0188] The second operating portion 324 is cylindrical and can be connected to a surface of the shoulder 321 facing away from the second sliding portion 323 in the above embodiment. At least two second protrusions 322 are connected to the curved sidewall of the second operating portion 324 .

[0189] In addition, referring to FIG. 13 a to FIG. 14 , the connecting arm 2 is provided with a seventh opening 22 , and the second operating portion 324 can be passed through the seventh opening 22 and extend to the outside of the connecting arm 2 .

[0190] Optionally, please refer to Figure 3, the handheld device 10 of the embodiment of the present application also includes a connecting wire 61, and the first driving member 51 is connected (indirectly or directly) to the actuator 8 (as shown in Figures 1-2) through the connecting wire 61; the connecting wire 61 includes a relaxed state and a tensioned state. In the tensioned state, the actuator 8 can be controlled by the connecting wire 61.

[0191] In this embodiment, please refer to Figure 3. The user can operate the first driving member 51 to switch the connecting wire 61 between a relaxed state and a tightened state. When the user tightens the connecting wire 61 by operating the first driving member 51, there is a force between the connecting wire 61 and the actuator 8, which can put the actuator 8 into a controlled state, that is, the user can directly control or indirectly control the action of the actuator 8 through the first driving member 51 and the connecting wire 61. Correspondingly, the action amplitude of the first driving member 51 can be converted into the action amplitude of the actuator 8 through the connecting wire 61. When the user loosens the connecting wire 61 by operating the first driving member 51, there is no force between the connecting wire 61 and the actuator 8, which can put the actuator 8 into an uncontrolled state, that is, the action of the actuator 8 is uncontrolled. Secondly, because the connecting wire 61 is a flexible member, when the user needs to rotate the handle head 11 and the handle body 12 to adjust the position of the first driving member 51, the connecting wire 61 in a relaxed state is not affected by the relative rotation between the handle head 11 and the handle body 12. That is, after the handle head 11 rotates to a preset position relative to the handle body 12, the connecting wire 61 is still in a relaxed state. The connecting wire 61 can still be transformed from a relaxed state to a tightened state and control the movement amplitude of the actuator 8. Therefore, in the handheld instrument 10 of the embodiment of the present application, the housing structure for adjusting the surgical operation angle and the transmission structure for driving the actuator 8 are decoupled, that is, the structure for adjusting the surgical operation angle is unlikely to interfere with the movement of the actuator 8, and the user experience is improved.

[0192] The actuator 8 may be a tool with opening and closing functions, such as tweezers, scissors, pliers or clamps.

[0193] In other embodiments, the actuator 8 may also be a hook, a knife, or an awl, etc. In other embodiments, the actuator 8 may also be an energy device, such as a plasma knife, an electric knife, or an ultrasonic knife.

[0194] As shown in FIG6 , the crown 11 is provided with a first accommodating cavity 113, a second opening 115, and a third opening 116. The first driver 51 (shown in FIG3 ) can be inserted into the third opening 116 (shown in FIG6 ). The third operating portion 511 of the first driver 51 is located outside the crown 11, while another portion of the first driver 51 is located within the first accommodating cavity 113 (shown in FIG6 ). The portion of the first driver 51 located within the first accommodating cavity 113 is rotatably connected to the crown 11. A connecting wire 61 (shown in FIG3 ) is inserted into the second opening 115 (shown in FIG6 ). A portion of the connecting wire 61 is located within the first accommodating cavity 113 and connected to the portion of the first driver 51 located within the first accommodating cavity 113. As shown in FIG8 , the handle 12 is provided with a second accommodating cavity 124 and a fifth opening 125 that communicate with the second opening 115, allowing the connecting wire 61 (shown in FIG3 ) to be inserted through the fifth opening 125 and extend into the second accommodating cavity 124. A sixth opening 129 (as shown in FIG. 18 ) is provided at one end of the handle body 12 for connection to the connecting arm 2, allowing the connecting wire 61 to pass through the sixth opening 129 and extend into the fourth accommodating cavity 26 (as shown in FIG. 14 ) of the connecting arm 2. The connecting wire 61 can then pass from the fourth accommodating cavity 26 into the accommodating cavity of the bending adjustment assembly 7 (not shown) until the connecting wire 61 is connected to the actuator 8. Referring to FIG. 3 , when the user presses the third operating portion 511, the first driving member 51 rotates relative to the handle head 11, thereby tensioning the connecting wire 61. When the user releases the pressure on the third operating portion 511, the connecting wire 61, no longer under the force, is relaxed.

[0195] Optionally, please refer to Figure 20, the handheld device 10 of the embodiment of the present application also includes an end face toothed disc 63 and a first transmission shaft 62, the second driving member 52 is rotatably connected to the handle 1, the end face toothed disc 63 is rotatably connected to the handle 1, the first transmission shaft 62 is rotatably connected to the connecting arm 2, the second driving member 52 is gear-engaged with the end face toothed disc 63, the first transmission shaft 62 is gear-engaged with the end face toothed disc 63, and the first transmission shaft 62 is directly or indirectly connected to the actuator 8.

[0196] In this embodiment, please refer to Figure 20. The user can operate the second driving member 52 to rotate. The second driving member 52 can drive the end face gear plate 63 to rotate relative to the handle 1. The end face gear plate 63 can drive the second driving member 52 to rotate relative to the connecting arm 2. The rotating second driving member 52 can drive the actuator 8 to rotate to adjust the posture of the actuator 8 (for example, the actuator 8 can rotate around the rotation axis O1 of the second driving member 52). Secondly, since the second driving member 52 is gear-engaged with the end face toothed disc 63 and the first transmission shaft 62 is also gear-engaged with the end face toothed disc 63, there is a set connecting line between the gear-engaging position of the second driving member 52 and the end face toothed disc 63 and the rotation axis O2 of the end face toothed disc 63, and there is also a set connecting line between the gear-engaging position of the first transmission shaft 62 and the end face toothed disc 63 and the rotation axis O2 of the end face toothed disc 63. There is a set angle α between the two connecting lines. When the user rotates the handle 1 and the connecting arm 2 to adjust the structural angle between the handle 1 and the connecting arm 2 (for example, the angle α), the angle α between the two connecting lines changes accordingly, and the second driving member 52 is still gear-engaged with the end face toothed disc 63, and the first transmission shaft 62 is also still gear-engaged with the end face toothed disc 63, that is, the gear meshing between the second driving member 52 and the end face toothed disc 63 and the gear meshing between the first transmission shaft 62 and the end face toothed disc 63 are not affected by the relative rotation between the handle 1 and the connecting arm 2. Therefore, the shell structure for adjusting the surgical operation angle and the transmission structure for driving the actuator 8 in the handheld instrument 10 of the embodiment of the present application are decoupled, that is, the structure for adjusting the surgical operation angle is difficult to interfere with the action of the actuator 8, and the user experience is higher.

[0197] The gear meshing between the second driving member 52 and the end face gear plate 63 may be bevel gear meshing, and correspondingly, the gear meshing between the first transmission shaft 62 and the end face gear plate 63 may be bevel gear meshing.

[0198] In other embodiments (not shown in the figures), the gear meshing between the second driving member 52 and the end face toothed disc 63 may be a spur gear meshing, and correspondingly, the gear meshing between the first transmission shaft 62 and the end face toothed disc 63 may be a spur gear meshing.

[0199] In other embodiments (not shown in the figures), the gear meshing between the second driving member 52 and the end face toothed disc 63 may be bevel gear meshing, and correspondingly, the gear meshing between the first transmission shaft 62 and the end face toothed disc 63 may be spur gear meshing.

[0200] In other embodiments (not shown in the figures), the gear meshing between the second driving member 52 and the end face toothed disc 63 may be a spur gear meshing, and correspondingly, the gear meshing between the first transmission shaft 62 and the end face toothed disc 63 may be a bevel gear meshing.

[0201] Among the above contents, bevel gear meshing has the advantages of high transmission efficiency, smooth movement and low noise, and the user experience is high.

[0202] In addition, the connecting arm 2 may include two oppositely arranged first bearings 23 (as shown in Figure 14), and the curved side walls of the two oppositely arranged first bearings 23 abut against the curved side walls of the first transmission shaft 62 to form a rotational connection relationship between the first transmission shaft 62 and the connecting arm 2.

[0203] Furthermore, as shown in FIG20 , the second driving member 52 includes a fourth operating portion 521 and a second transmission shaft 522. The fourth operating portion 521 is located on the exterior of the crown 11, which is provided with a fourth opening 117 communicating with the first accommodating cavity 113. The second transmission shaft 522 can be sequentially inserted through the fourth opening 117, the first accommodating cavity 113, and the second accommodating cavity 124. The end of the second transmission shaft 522 facing away from the fourth operating portion 521 can be engaged with the gear of the end face gearwheel 63. A user can rotate the fourth operating portion 521 to rotate the second transmission shaft 522, the end face gearwheel 63, and the first transmission shaft 62. The handle 12 includes two opposing second bearings 128 (as shown in FIG3 ). The curved sidewalls of the two opposing second bearings 128 abut against the curved sidewalls of the second transmission shaft 522, thereby forming a rotational connection between the second transmission shaft 522 and the handle 12. The second transmission shaft 522 is disposed through the fourth opening 117. The second transmission shaft 522 is unaffected by the rotation of the handle head 11 relative to the handle body 12. The fourth operating portion 521 is rotatably connected to the end of the handle head 11 facing away from the handle body 12. The fourth operating portion 521 can rotate relative to the handle head 11 about the rotation axis O1. The fourth operating portion 521 is also unaffected by the rotation of the handle head 11 relative to the handle body 12. Therefore, in the handheld instrument 10 of the present embodiment, the housing structure for adjusting the surgical operating angle and the transmission structure for driving the actuator 8 are decoupled. In other words, the structure for adjusting the surgical operating angle is unlikely to interfere with the movement of the actuator 8, resulting in a higher user experience.

[0204] Optionally, as shown in Figure 14, the connecting arm 2 is provided with an eighth opening 24 and a fourth accommodating cavity 26, at least part of the bending adjustment component 7 can be installed in the fourth accommodating cavity 26 through the eighth opening 24, and the connection relationship between the bending adjustment component 7 and the connecting arm 2 is a ball motion pair connection.

[0205] In the accompanying drawings herein, the dotted lines represent the rotation axis O1 and the rotation axis O2, the rotation axis O1 and the rotation axis O2 are perpendicular, and the dotted line represents the structural section line.

[0206] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A handheld device, characterized in that: include: a first shell; A second housing, rotatably connected to the first housing; a limiting member, at least a portion of which is movable relative to at least one of the first shell and the second shell, so that the limiting member has at least a first state and a second state; Wherein, in the first state, the limiting member can limit the relative rotation between the first shell and the second shell, and in the second state, the first shell and the second shell can rotate relative to each other.

2. The handheld device according to claim 1, characterized in that: The limiting member is movably connected to the first shell. In the first state, the first shell is engaged with the second shell through the limiting member. In the second state, the second shell is separated from the limiting member. And / or, the limiting member is movably connected to the second shell, and in the first state, the second shell is clamped with the first shell through the limiting member, and in the second state, the first shell is separated from the limiting member.

3. The handheld device according to claim 2, characterized in that: The stopper is movably connected to the first shell, and either the stopper or the second shell comprises a protrusion or at least two protrusions spaced apart around the rotation axis, and the other is provided with a recessed portion or at least two recessed portions spaced apart around the rotation axis, in the first state, the protrusion is located inside the recessed portion, and in the second state, the protrusion is located outside the recessed portion; And / or, the limit member is movably connected to the second shell, either the limit member or the first shell includes a protrusion or at least two protrusions spaced apart around the rotation axis, and the other is provided with a recessed portion or at least two recessed portions spaced apart around the rotation axis, in the first state, the protrusion is located inside the recessed portion, and in the second state, the protrusion is located outside the recessed portion.

4. The handheld device according to claim 3, characterized in that: If at least three recessed portions are provided, the interval distance between every two recessed portions is the same.

5. The handheld device according to claim 2, characterized in that: The handheld device further comprises an elastic member, one end of which is connected to the first shell, and the other end of which is connected to the limiting member. Under the elastic force of the elastic member, the limiting member is in the first state.

6. The handheld device according to claim 1, characterized in that: Either one of the first shell and the limiting member is provided with a slide groove, and the other one includes a sliding portion, and the sliding portion is slidably matched with the slide groove.

7. The handheld device according to any one of claims 1 to 6, characterized in that: The handheld instrument includes a handle, a connecting arm and a first driving member, the handle includes a handle head and a handle body, the handle head is connected to the first driving member, the handle body is connected to the connecting arm, the handle head is the first shell, and the handle body is the second shell.

8. The handheld device according to claim 7, characterized in that: The handheld device also includes an actuator and a connecting wire, and the first driving member is connected to the actuator via the connecting wire; the connecting wire includes a relaxed state and a tensioned state, and in the tensioned state, the actuator can be controlled by the connecting wire.

9. The handheld device according to any one of claims 1 to 6, characterized in that: The handheld instrument comprises a handle, a connecting arm and a second driving member, the handle is connected to the second driving member, the handle is the first shell, and the connecting arm is the second shell.

10. The handheld device according to claim 9, characterized in that: The handheld device also includes an end face toothed disc, a first transmission shaft and an actuator, the second driving member is rotatably connected to the handle, the end face toothed disc is rotatably connected to the handle, the first transmission shaft is rotatably connected to the connecting arm, the second driving member is meshed with the end face toothed disc gear, the first transmission shaft is meshed with the end face toothed disc gear, and the first transmission shaft is connected to the actuator.

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