Shaft end limiting pressing plate and pupil distance adjusting device

Abstract

The shaft end limiting pressing plate comprises a pressing plate body located on the axial outer side of a shaft end, an opening is formed in the pressing plate body, a connecting arm is arranged in the opening so as to divide the opening into at least two open holes, the connecting arm is provided with a protrusion extending towards the shaft end, and the protrusion extends towards the shaft end. The protrusion is connected with the shaft end in an abutting mode. A through hole for fixing is formed in the pressing plate body; the protrusions are connected with the shaft ends in an abutting mode, the contact area is small, and friction is reduced. The opening design forms the structure of the connecting arm, when the shaft end exerts axial pressure on the protrusion, the connecting arm deforms and can release the pressure exerted by the shaft end, and the damping and buffering effects are achieved; the shaft end limiting pressing plate is adopted for limiting the end of the screw rod of the interpupillary distance adjusting device, the protrusion is connected with the end of the screw rod in an abutting mode, and friction is small; moreover, the shaft end limiting pressing plate is simple in structure, meets the requirement of miniaturization of the pupil distance adjusting device, and improves the assembly flexibility of the whole machine.

Description

Technical Field

[0001] The invention relates to the technical field of shaft end limiting, and in particular to a shaft end limiting pressing plate and a pupil distance adjusting device using the pressing plate. Background Art

[0002] After the shaft is installed on the support device, an axial limit device that cooperates with the end of the shaft needs to be installed on the support device. Especially when the shaft is a rotating component, the axial limit device is necessary to prevent axial displacement during the rotation of the shaft. The existing axial limit device has a relatively complex structure, including a limit end cover, which is fixed to the support device by multiple screws or bolts. In order to reduce the friction between the limit end cover and the end of the shaft, a metal gasket needs to be installed; this results in a large number of axial limit device components, cumbersome assembly, and low efficiency. For some installation occasions with relatively narrow spaces, the installation is difficult; and the overall structure will also be relatively large, which cannot adapt to the use occasions that require a miniaturized structure. Summary of the invention

[0003] The main purpose of the present invention is to provide an axis end limit pressure plate and an interpupillary distance adjustment device. The axis end limit pressure plate has the characteristics of simple structure, easy installation, reduced friction and low production cost.

[0004] To achieve the above-mentioned purpose, the present invention proposes a first technical solution: a shaft end limiting pressure plate, comprising a pressure plate body located axially outside the shaft end, an opening is provided on the pressure plate body, a connecting arm is provided in the opening to separate the opening into at least two openings, the connecting arm is provided with a protrusion extending toward the shaft end, the protrusion is abutted and connected with the shaft end; the pressure plate body is provided with a through hole for fixing.

[0005] Optionally, the pressing plate body is connected to a bending fixing plate, and the bending fixing plate and the pressing plate body are an integral structure.

[0006] Optionally, the bending fixing plate includes a bending portion and a fixing plate portion, the fixing plate portion is connected to the pressure plate body via the bending portion, the fixing plate portion is vertically arranged to the pressure plate body, and the fixing plate portion is provided with a protrusion extending to one side or both sides for preventing slipping.

[0007] Optionally, the opening is formed by punching out the pressing plate body; and / or, The protrusion is formed by stamping the connecting arm.

[0008] Optionally, the bent fixing plate and the through hole are diagonally offset based on the pressure plate body.

[0009] The beneficial effects of the present invention are: The shaft end limiting pressure plate described in the present invention includes a pressure plate body located axially outside the shaft end, an opening is provided on the pressure plate body, a connecting arm is provided in the opening to separate the opening into at least two openings, and the connecting arm is provided with a protrusion extending toward the shaft end, and the protrusion is abutted against the shaft end; a through hole for fixing is provided on the pressure plate body; the protrusion is abutted against the shaft end, and the contact area is small to reduce friction; the opening design forms a structure of the connecting arm, and when the shaft end applies axial pressure to the protrusion, the connecting arm is deformed to release the pressure applied by the shaft end, thereby playing a role of shock absorption and buffering.

[0010] To achieve the above-mentioned purpose, the present invention proposes a second technical solution: a pupil distance adjustment device, comprising a middle frame, a screw rod rotatably installed in the middle frame, a driving device installed on the middle frame that is transmission-connected to the screw rod, and shaft end limit pressure plates that cooperate with the ends of the screw rod are installed on the middle frames at both ends of the screw rod, and the protrusions of the shaft end limit pressure plates are abutted against the ends of the screw rod.

[0011] Optionally, the pressure plate body of the shaft end limiting pressure plate is fixedly connected to the side end surface of the middle frame, and the pressure plate body is connected to a bending fixing plate, and the bending fixing plate is hung with the top end surface of the middle frame.

[0012] Optionally, a first recess whose depth direction is consistent with the axial direction of the screw rod is provided on the side end face of the middle frame, and the pressure plate body is installed in the first recess; the bending fixing plate includes a bending portion and a fixing plate portion, and the top end face of the middle frame is provided with a second recess that cooperates with the fixing plate portion.

[0013] Optionally, the screw rod is provided with two threaded sections and a connecting section located between the two threaded sections, and each threaded section is provided with a sliding block; the driving device is located at one side of the screw rod, and the driving device is drivingly connected to the connecting section of the screw rod; The driving device comprises a driving motor, and a gear set is transmission-connected between the driving motor and the lead screw.

[0014] Optionally, a guide rod arranged parallel to the screw rod is also mounted on the middle frame, and the sliding block is slidably mounted on the guide rod.

[0015] The beneficial effects of the present invention are: The interpupillary distance adjustment device described in the present invention comprises a middle frame, a screw rod is rotatably installed in the middle frame, a driving device connected to the screw rod for transmission is installed in the middle frame, and the middle frames at both ends of the screw rod are provided with shaft end limiting pressure plates that cooperate with the ends of the screw rod, and the protrusions of the shaft end limiting pressure plates are abutted against the ends of the screw rod; the shaft end limiting pressure plates have a simple structure and are easy to install, which helps to reduce the axial length of the interpupillary distance adjustment device and achieve structural miniaturization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention. Figure 1 It is a structural schematic diagram of an embodiment of the shaft end limiting pressure plate of the present invention; Figure 2 The structure of an embodiment of the pupil distance adjustment device of the present invention is shown in FIG. Figure 1 ; Figure 3 The structure of an embodiment of the pupil distance adjustment device of the present invention is shown in FIG. Figure 2 ; Figure 4 is a cross-sectional view of an embodiment of the pupil distance adjustment device of the present invention; In the figure: 11-pressing plate body; 12-protrusion; 13-bending fixing plate; 131-bending portion; 132-fixing plate portion; 14-through hole; 15-opening; 16-connecting arm; 21-middle frame; 22-screw rod; 23-slider; 31-seat body; 32-driving motor; 41-first gear; 42-second gear; 43-third gear; 44-fourth gear; 5-guide rod. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0018] like Figure 1 As shown, a shaft end limiting pressure plate includes a pressure plate body 11 located axially outside the shaft end, an opening is provided on the pressure plate body 11, a connecting arm 16 is provided in the opening to separate the opening into at least two openings 15, the connecting arm 16 is provided with a protrusion 12 extending toward the shaft end, the protrusion 12 is abutted against the shaft end; the pressure plate body 11 is provided with a fixing through hole 14.

[0019] The fixing bolt or screw passes through the through hole 14 and is fixedly connected to the supporting device of the shaft end, so that the protrusion 12 is abutted against the shaft end, with a small contact area and reduced friction; no gasket is required, which reduces components, saves installation steps, improves installation efficiency, and reduces costs; the opening 15 is designed to form a connecting arm 16 structure. When the shaft end applies axial pressure to the protrusion, the connecting arm 16 is deformed to release the pressure applied by the shaft end, thereby playing a shock-absorbing and buffering role.

[0020] The bending fixing plate 13 cooperates with the fixing bolts or screws passing through the through holes 14 to install the shaft end limiting pressure plate in place, further saving installation steps and improving efficiency.

[0021] According to some embodiments of the present invention, the platen body 11 is connected to a bent fixing plate 13, and the bent fixing plate 13 is an integral structure with the platen body 11. One end of the platen body 11 extends outward and is bent to form the bent fixing plate 13; the integrated structure is easy to process and has high overall strength after forming.

[0022] According to some embodiments of the present invention, the bent fixed plate 13 includes a bent portion 131 and a fixed plate portion 132, the fixed plate portion 132 is connected to the platen body 11 through the bent portion 131, the fixed plate portion 132 is vertically arranged with the platen body 11, and the fixed plate portion 132 is provided with a protrusion extending to one side or both sides for preventing slipping; one or two protrusions are provided, and two protrusions are optimal; due to the effect of the protrusions, the lateral width of the fixed plate portion 132 is larger than the lateral width of the bent portion 131, and during use, the end face of the protrusion extending outward forms a snap-fit ​​surface for preventing slipping. In order to achieve the installation effect, the fixed plate portion 132 and the platen body 11 need to present a certain angle, and the right angle setting is convenient for processing; of course, other angles can also be set, such as an acute angle slightly less than 90°, or set to other angles that match the shaft support device.

[0023] According to some embodiments of the present invention, the pressure plate body 11 is provided with a plurality of openings 15, and the openings 15 are evenly distributed around the protrusions 12. During the rotation of the shaft, the shaft end will generate a relatively large pressure on the pressure plate body 11 through the protrusions 12. The opening 15 structure is arranged around the protrusions 12, and a connecting arm 16 that matches the distribution of the openings 15 is formed on the pressure plate body 11. The connecting arm 16 undergoes adaptive deformation under the action of pressure to release this part of the pressure, thereby playing a role in buffering and shock absorption.

[0024] According to some embodiments of the present invention, the opening 15 is formed by punching the pressure plate body 11; and / or the protrusion 12 is formed by stamping the connecting arm 16. By utilizing the above-mentioned processing technology, the connecting arm 16 and the pressure plate body 11 are an integrated structure, which can ensure the toughness and strength of the connecting arm 16, so that it can not only undergo adaptive deformation under the action of axial pressure to achieve the effect of pressure relief, buffering and shock absorption, but also ensure that it will not deform and extend its service life. According to some embodiments of the present invention, the bent fixing plate 13 and the through hole 14 are diagonally offset based on the pressure plate body 11. The offset diagonal setting of the two will form a diagonal pulling force on the pressure plate body 11 when the installation is completed, so that the shaft end limit pressure plate is firmly clamped on the shaft end, and the connection is firm and reliable.

[0025] like Figures 2 to 4 As shown, a pupil distance adjustment device includes a middle frame 21, a screw rod 22 is rotatably installed in the middle frame 21, a driving device is installed on the middle frame 21 that is transmission-connected to the screw rod 22, and the middle frame 21 at both ends of the screw rod 22 is installed with the shaft end limit pressure plate that cooperates with the end of the screw rod 22, and the protrusion 12 of the shaft end limit pressure plate is abutted against the end of the screw rod 22.

[0026] The present pupil distance adjustment device uses the above-mentioned axial end limiting pressure plate to limit the axial end of the screw rod 22. Compared with the traditional axial end limiting device, it has fewer components, simpler structure, and easier installation, which helps the pupil distance adjustment device to reduce the axial length, realize structural miniaturization, and improve the flexibility of the assembly of the pupil distance adjustment device. The opening 15 and the connecting arm 16 can release the axial pressure of the axial end of the screw rod 22 on the pressure plate body 11, playing a shock-absorbing and buffering role.

[0027] According to some embodiments of the present invention, the pressure plate body 11 of the shaft end limit pressure plate is fixedly connected to the side end surface of the middle frame 21, and the fixed plate portion 132 of the bent fixed plate 13 is hung on the top end surface of the middle frame 21. The fixed plate portion 132 of the bent fixed plate 13 is hung on the top end surface of the middle frame 21, and the pressure plate body 11 is fixedly connected to the side end surface of the middle frame 21 by screws or bolts to form a diagonal connection structure, forming tension on the pressure plate body 11, and the connection is firm.

[0028] According to some embodiments of the present invention, a first recess whose depth direction is consistent with the axial direction of the screw rod 22 is provided on the side end surface of the middle frame 21, and the pressure plate body 11 is installed in the first recess; the top end surface of the middle frame 21 is provided with a second recess that cooperates with the fixed plate portion 132 of the bent fixed plate 13. The setting of the first recess and the second recess allows the shaft end limit pressure plate to be embedded in the middle frame 21 after installation, which is more beautiful and has a more compact structure. In order to adapt to the structure of the fixed plate portion 132, the second recessed portion is a T-shaped structure, and the protruding portion of the fixed plate portion 132 cooperates with the T-shaped extension area of ​​the second recessed portion to prevent the bent fixed plate 13 from detaching from the middle frame.

[0029] According to some embodiments of the present invention, the screw rod 22 is provided with two threaded segments and a connecting segment located between the two threaded segments, and each threaded segment is equipped with a slider 23; the threads of the two threaded segments turn in opposite directions; the driving device is located on one side of the screw rod 22, and the driving device is transmission-connected to the connecting segment of the screw rod 22.

[0030] The driving device controls the movement of the slider 23 through the screw rod 22, and uses the slider 23 to drive the lens barrel assembly connected thereto to move, thereby realizing the adjustment of the pupil distance, and the adjustment process is accurate and fast; the driving device is located on one side of the screw rod 22 and is arranged perpendicular to the screw rod 22, which effectively reduces the overall axial length of the device, making the overall structure of the pupil distance adjustment device reasonable and compact, and improving the flexibility of the assembly of the whole machine.

[0031] According to some embodiments of the present invention, the driving device includes a seat body 31 integrally formed with the middle frame 21, a driving motor 32 is installed in the seat body 31, and a gear set is connected between the driving motor 32 and the screw rod 22. The torque of the driving motor 32 is transmitted to the screw rod 22 through the gear set, thereby driving the screw rod 22 to rotate; the driving motor 32 provides power for the pupil distance adjustment device, and the setting of the driving motor 32 and the gear set is the basis for achieving a precise and fast adjustment effect.

[0032] The power output shaft of the driving motor 32 and the screw rod 22 can be arranged in parallel or vertically. When the two are arranged vertically, the gear set needs to adopt a steering gear set.

[0033] The gear set includes a first gear 41 that is transmission-connected to the power output end of the drive motor 32, and also includes a second gear 42 that is fixedly mounted on the connecting section of the screw rod 22, and a steering gear is transmission-connected between the first gear 41 and the second gear 42. The second gear 42 and the screw rod 22 are an integral injection-molded structure, which can reduce the difficulty of assembly. The steering gear includes a third gear 43 and a fourth gear 44 that are coaxially arranged and fixedly connected, the third gear 43 is meshed with the first gear 41 for transmission, and the fourth gear 44 is meshed with the second gear 42 for transmission.

[0034] The driving motor 32 is fixed to the middle frame 21, and transmits the torque to the screw 22 through the gear set. Since the output torque direction of the motor is perpendicular to the rotation direction of the screw 22, a steering gear is used to change the output direction of the torque; according to the structural layout, the central axis of the first gear 41 is perpendicular to the central axis of the second gear 42, so the torque cannot be directly transmitted between the first gear 41 and the second gear 42. The steering gear can well transmit the torque of the first gear 41 to the second gear 42, thereby driving the screw 22 to rotate. Specifically, under the drive of the first gear 41, the third gear 43 and the fourth gear 44 can rotate synchronously, thereby driving the second gear 42 to work, realizing the transmission of torque from the motor to the screw 22. The four gears cooperate with each other to ensure the smooth transmission of torque and achieve the purpose of precise and rapid adjustment.

[0035] According to some embodiments of the present invention, a guide rod 5 arranged parallel to the screw rod 22 is further installed on the middle frame 21, and the slider 23 is slidably installed on the guide rod 5. The setting of the guide rod 5 can ensure that the slider 23 does not swing during the movement, and the guide rod 5 has a guiding effect on the slider 23. The guide rod 5 also has the function of enhancing the strength of the middle frame 21.

[0036] In summary, the shaft end limiting device of the screw rod 22 of the present pupil distance adjustment device adopts the shaft end limiting pressure plate described above, which has fewer limiting components, low production cost, simple installation and high installation efficiency. A recessed area is provided on the middle frame 21, and the shaft end limiting pressure plate is embedded in the middle frame 21 after installation, and the structure is compact and beautiful. The diagonal offset setting of the bent fixing plate 13 and the fixed through hole 14 of the shaft end limiting pressure plate can realize the fixed installation of the shaft end limiting pressure plate by using a fastening bolt, which greatly saves the assembly steps and improves the efficiency. The driving device is arranged on one side of the screw rod 22, and the driving device is installed in the middle of the middle frame 21. The torque of the driving motor 32 is transferred to the screw rod 22 through the steering gear, so that the axial length of the pupil distance adjustment device is greatly reduced, the structure is more compact, and the flexibility of the assembly of the pupil distance adjustment device is improved.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A shaft end limit pressure plate, characterized in that: It includes a pressure plate body located axially outside the shaft end, the pressure plate body is provided with an opening, a connecting arm is provided in the opening to separate the opening into at least two openings, the connecting arm is provided with a protrusion extending toward the shaft end, the protrusion is abutted and connected with the shaft end; the pressure plate body is provided with a through hole for fixing.

2. The shaft end limiting pressure plate according to claim 1, characterized in that: The pressing plate body is connected with a bending fixing plate, and the bending fixing plate and the pressing plate body are an integral structure.

3. The shaft end limiting pressure plate according to claim 2 is characterized in that: The bending fixing plate includes a bending portion and a fixing plate portion, the fixing plate portion is connected to the pressing plate body via the bending portion, the fixing plate portion is vertically arranged to the pressing plate body, and the fixing plate portion is provided with a protrusion extending to one side or both sides for preventing slipping.

4. The shaft end limiting pressure plate according to claim 1, characterized in that: The opening is formed by punching the pressing plate body; and / or, The protrusion is formed by stamping the connecting arm.

5. The shaft end limiting pressure plate according to claim 2, characterized in that: The bent fixing plate and the through hole are diagonally offset based on the pressing plate body.

6. A pupil distance adjustment device, comprising a middle frame, a screw rod rotatably mounted in the middle frame, and a driving device connected to the screw rod in a transmission manner mounted on the middle frame, characterized in that: The middle frames at both ends of the screw rod are provided with shaft end limiting pressure plates as described in any one of claims 1 to 5 that cooperate with the ends of the screw rod, and the protrusions of the shaft end limiting pressure plates are abutted against the ends of the screw rod.

7. The pupil distance adjustment device according to claim 6, characterized in that: The pressing plate body of the shaft end limiting pressing plate is fixedly connected to the side end surface of the middle frame, and the pressing plate body is connected to a bending fixing plate, and the bending fixing plate is hung with the top end surface of the middle frame.

8. The pupil distance adjustment device according to claim 7, characterized in that: A first recess whose depth direction is consistent with the axial direction of the screw rod is arranged on the side end surface of the middle frame, and the pressure plate body is installed in the first recess; the bending fixing plate includes a bending portion and a fixing plate portion, and the top end surface of the middle frame is provided with a second recess that cooperates with the fixing plate portion.

9. The pupil distance adjustment device according to claim 6, characterized in that: The screw rod is provided with two threaded sections and a connecting section between the two threaded sections, and each threaded section is provided with a slider; the driving device is located at one side of the screw rod, and the driving device is drivingly connected to the connecting section of the screw rod; The driving device comprises a driving motor, and a gear set is transmission-connected between the driving motor and the lead screw.

10. The pupil distance adjustment device according to claim 9, characterized in that: A guide rod arranged parallel to the screw rod is also installed on the middle frame, and the sliding block is slidably installed on the guide rod.

Images