Double-rod lifting support and reading stand

Abstract

The utility model belongs to the technical field of stationery and sporting goods, and particularly discloses a double-rod lifting support and a reading stand, the double-rod lifting support comprises a synchronous adjusting mechanism and two telescopic rods arranged side by side, the synchronous adjusting mechanism is located between the two telescopic rods, and the synchronous adjusting mechanism comprises an installation part and two locking assemblies; the locking assembly comprises a moving piece, a locking piece and an elastic piece, and the locking piece and the moving piece achieve locking of the second movable part and the first movable part under the action of the elastic piece. The two telescopic rods are adopted, so that the stability of the whole lifting support can be improved. Meanwhile, the lifting support is further provided with a synchronous adjusting mechanism on the basis of the two telescopic rods, synchronous unlocking or locking of the two telescopic rods can be achieved through the synchronous adjusting mechanism, synchronous lifting of the two telescopic rods is facilitated, the adjusting difficulty of the double-rod lifting support is lowered, and the double-rod lifting support is more convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of stationery and sports goods, and particularly relates to a double-rod lifting bracket and a reading stand. Background Art

[0002] A reading stand is a reading aid mainly used to support books or other reading materials (such as magazines and newspapers, etc.) to relieve the fatigue of the cervical vertebra and eyes caused by long-term reading of readers. At present, reading stands mainly include vertical reading stands and horizontal reading stands. Compared with horizontal reading stands, vertical reading stands have more functions and more adjustment methods, and can provide various ways to place books. Therefore, they are more popular among consumers.

[0003] The existing vertical reading stand mainly includes a base, a lifting bracket and a panel. The base is placed on the desktop. The lifting bracket is used to connect the base and the panel and can adjust the distance between the base and the panel. The panel is used to place books. The panel and the lifting bracket are hinged to adjust the inclination angle of the books on the panel.

[0004] However, most of the existing lifting brackets are single telescopic rod structures, which have the problem of poor support strength. To improve the support strength of the lifting bracket, some lifting brackets adopt two telescopic rod structures. However, each telescopic rod is provided with an unlocking component for cooperative use to control the adjustment of the length of the telescopic rod. When the lengths of the double telescopic rods are adjusted, the operator needs to operate the two unlocking components respectively, and then move the panel. After the panel is moved in place, the operator needs to hold the height of the panel with one hand and adjust the locking components respectively with the other hand to limit the length of the telescopic rod, resulting in the problem of inconvenient operation of the existing double telescopic rod lifting bracket. Summary of the Utility Model

[0005] One of the purposes of the utility model is to provide a double-rod lifting bracket and a reading stand, which solve the problem of inconvenient adjustment of the lifting bracket in the prior art.

[0006] The utility model provides a double-rod lifting bracket, which includes a synchronous adjustment mechanism and two telescopic rods arranged side by side. The synchronous adjustment mechanism is located between the two telescopic rods;

[0007] The telescopic rod includes a first movable part and a second movable part. The second movable part moves along the first movable part to change the length of the telescopic rod;

[0008] The synchronous adjustment mechanism includes a mounting part and two locking components. The mounting part is relatively fixed to the first movable part, and the two locking components are respectively used in cooperation with the two second movable parts;

[0009] The locking assembly includes a moving member, a locking member, and an elastic member. The moving member is arranged on the second movable part. The locking member is slidably connected to the mounting member. The elastic member is used to cooperate the locking member with the moving member so as to lock the second movable part and the first movable part.

[0010] Under the action of the same external force, the two locking members slide synchronously on the mounting member, separating the locking member from the corresponding moving member, so as to unlock the second movable part and the first movable part.

[0011] The principle of the present utility model:

[0012] The two telescopic rods are located between the base and the panel of the reading stand, and are respectively connected to the base and the panel, and are used to adjust the height of the panel.

[0013] When it is necessary to lower the height of the panel of the reading stand, the operator can act on the two locking members with one hand and drive the two locking members to move simultaneously, so that the locking member is separated from the corresponding moving member, unlocking the second movable part and the first movable part.

[0014] At this time, if it is necessary to adjust the length of the telescopic rod, the operator acts on the panel with the other hand, raises or presses the panel to a suitable height, and then cancels the external force acting on the two locking members. Then, the locking member can be locked with the corresponding moving member under the action of the corresponding elastic member to ensure the length of the telescopic rod.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The present utility model adopts two telescopic rods, which can improve the stability of the entire lifting bracket. At the same time, on the basis of the two telescopic rods, the lifting bracket is also provided with a synchronous adjustment mechanism. By using the synchronous adjustment mechanism, the two telescopic rods can be synchronously unlocked or locked, facilitating the synchronous lifting of the two telescopic rods, reducing the adjustment difficulty of the double-rod lifting bracket, and making the use of the double-rod lifting bracket more convenient.

[0017] Further, the moving member includes a limit rack, the limit rack is arranged on the second movable part, and the length direction of the limit rack is arranged along the moving direction of the second movable part; the locking member includes at least one limit tooth, the limit tooth is perpendicular to the length direction of the limit rack, and is inserted and matched with the limit rack.

[0018] Further, the limiting rack has a plurality of tooth grooves, and each tooth groove includes a guiding side wall and a supporting side wall, and the guiding side wall and the supporting side wall are arranged at intervals along the length direction of the limiting rack; the limiting tooth has a supporting plane for cooperating with the supporting side wall and a sliding inclined plane for cooperating with the guiding side wall; the second movable part moves in a direction away from the first movable part, driving the limiting rack to move, so that each guiding side wall cooperates with the sliding inclined plane in sequence, enabling the limiting tooth to reciprocate under the action of the elastic member and sequentially inserting into the next tooth groove in the moving direction of the limiting rack; under the action of the elastic member, the locking member enables the limiting tooth to extend into the next tooth groove of the limiting rack, enabling the supporting side wall to cooperate with the supporting plane to limit the second movable part from moving towards the first movable part.

[0019] Further, the locking member further includes a sliding part and an operating part which are connected to each other. The sliding part is slidably connected to the mounting member, the operating part protrudes outward or recesses inward along the mounting member, and the two operating parts are arranged at intervals on the mounting member.

[0020] Further, the mounting member includes a hollow mounting rod, and the mounting rod is located between the two first movable parts and is respectively connected to the two first movable parts; the two locking members are respectively located at both ends of the mounting rod and are correspondingly connected to the mounting rod; the elastic member is located between the mounting rod and the locking member, or the elastic member is located between the two locking members.

[0021] Further, the limiting tooth is telescopically arranged at the end of the mounting rod, the sliding part is connected to the limiting tooth, and a sliding groove for slidably connecting with the sliding part is provided inside the mounting rod, and the sliding part slides along the sliding groove, driving the limiting tooth to telescopically move.

[0022] Further, a sliding limiting member is provided between the first movable part and the second movable part, and the sliding limiting member is used to prevent the second movable part and the first movable part from separating.

[0023] The second object of the present utility model is to provide a reading stand which is convenient for lifting and adjusting. Specifically, the reading stand includes the above-mentioned double-rod lifting bracket, and further includes a panel and a base. The panel and the base are arranged at intervals, and the two telescopic rods are located between the base and the panel and are used to adjust the distance between the panel and the base.

[0024] Further, the base has a U-shaped structure. The base includes a bottom plate and two auxiliary support plates. The telescopic rod is located on one side of the bottom plate, and one end of the telescopic rod is vertically fixed to the bottom plate. The two auxiliary support plates are located on the other side of the bottom plate and are respectively rotatably connected to the bottom plate; the auxiliary support plates rotate along the bottom plate, so that the base has a closed state and an open state, and the base can be switched between the closed state and the open state.

[0025] Further, the telescopic rod is located on one side of the panel, and the other end of the telescopic rod is rotatably connected to the panel. Description of the Drawings

[0026] Figure 1 is a schematic structural view of a reading stand of the present utility model;

[0027] Figure 2 is an exploded schematic structural view of a reading stand of the present utility model;

[0028] Figure 3 is another exploded schematic structural view of a reading stand of the present utility model;

[0029] Figure 4 is an exploded schematic structural view of a double-rod lifting bracket in the present utility model;

[0030] Figure 5 is a schematic structural view of a double-rod lifting bracket in the present utility model;

[0031] Figure 6 is Figure 5 a schematic structural view from another perspective;

[0032] Figure 7 is another schematic structural view of a double-rod lifting bracket in the present utility model;

[0033] Figure 8 is Figure 6 a schematic structural view with a cover plate removed;

[0034] Figure 9 is a schematic structural view of a locking member in the present utility model;

[0035] Figure 10 is Figure 9 a schematic structural view from another perspective;

[0036] Figure 11 is a schematic structural view of a base in the reading stand of the present utility model;

[0037] Figure 12 is Figure 7 an enlarged view of part A in;

[0038] In the figure: base 1, auxiliary support plate 11, bottom plate 12, accommodation groove 13, panel 2, book clip 21, auxiliary support rod 22, bottom support 23, positioning ring 24, telescopic rod 3, first movable part 31, positioning protrusion 311, second movable part 32, elastic card 321, connecting seat 4, butterfly bolt 41, mounting part 5, cover plate 51, connecting block 52, sliding groove 53, notch 54, locking member 6, operating part 61, sliding part 62, plug pin 63, limiting tooth 64, supporting plane 641, sliding inclined plane 642, moving part 7, tooth groove 71, supporting side wall 711, guiding side wall 712. Detailed implementation manners

[0039] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0041] In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0042] As Figures 1-10 shown, the present utility model provides a reading stand, which includes a base 1 and a panel 2. A double-rod lifting bracket is provided between the base 1 and the panel 2. The base 1 serves as a support base, and the panel 2 serves as a support plate for placing reading books. When in use, the base 1 is placed on a support platform such as a desktop, and the double-rod lifting bracket is used to adjust the distance between the base 1 and the panel 2 to achieve the adjustment of the height of the panel 2. After the height of the panel 2 is appropriate, the book is placed on the panel 2 for the user to read.

[0043] The double-rod lifting bracket provided by the present utility model has better support strength and stability compared with a single telescopic rod-shaped bracket. At the same time, the double-rod lifting bracket of the present utility model is more convenient to operate. Specifically, the structure of the double-rod lifting bracket is as follows.

[0044] As Figures 1-10 shown, the double-rod lifting bracket includes a synchronous adjustment mechanism and two telescopic rods 3 arranged side by side. The synchronous adjustment mechanism is located between the two telescopic rods 3. The telescopic rod 3 includes a first movable part 31 and a second movable part 32. The second movable part 32 moves along the first movable part 31 to change the length of the telescopic rod 3.

[0045] The telescopic rod 3 is used to adjust the distance between the base 1 and the panel 2. For this purpose, the telescopic rod 3 can be any structure capable of adjusting the length in the prior art. For example, the first movable part 31 adopts a strip groove structure, and the second movable part 32 is a strip block structure embedded in the first movable part 31. Then, the second movable part 32 slides along the first movable part 31, and the overall length of the telescopic rod 3 can be adjusted.

[0046] In the present utility model, both the first movable part 31 and the second movable part 32 are tubular structures with one end open, and the first movable part 31 and the second movable part 32 are sleeved with each other.

[0047] Two telescopic rods 3 are arranged side by side. The lower end of the telescopic rod 3 is connected to the base 1, and the upper end of the telescopic rod 3 is connected to the panel 2. Correspondingly, the lower end of the telescopic rod 3 can be the first movable part 31 or the second movable part 32, so that there are multiple setting methods for the double-rod lifting bracket of the present application between the base 1 and the panel 2.

[0048] Specifically, as shown in Figure 3 、 4 、5, 6, 7, 8, in the utility model, the second movable part 32 and the first movable part 31 are sleeved up and down, the second movable part 32 is sleeved in the first movable part 31, the lower end of the first movable part 31 is the lower end of the telescopic rod 3, the lower end of the first movable part 31 is fixed to the base 1, a connecting seat 4 is provided at the upper end of the second movable part 32, and the connecting seat 4 is rotatably connected to the panel 2.

[0049] During use, both the first movable part 31 and the second movable part 32 can be used as the length adjustment end of the entire telescopic rod 3. Taking the structure in Figure 2 as an example, at this time, the second movable part 32 is connected to the panel 2. When the reading stand is adjusted in height, the distance of the end of the second movable part 32 is adjusted. If on the basis of Figure 2 , the installation positions of the base 1 and the panel 2 are swapped, and the first movable part 31 is connected to the panel 2. When the reading stand is adjusted in height, the distance of the end of the first movable part 31 is adjusted.

[0050] The synchronous adjustment mechanism includes a mounting member 5 and two locking components. The mounting member 5 is relatively fixed to the first movable part 31, and the two locking components are respectively used in cooperation with the two second movable parts 32; the locking component includes a moving member 7, a locking member 6 and an elastic member, and the moving member 7 is arranged on the second movable part 32. The locking member 6 is slidably connected to the mounting member 5, and the elastic member is used to make the locking member 6 cooperate with the moving member 7 to lock the second movable part 32 and the first movable part 31; under the action of the same external force, the two locking members 6 slide synchronously on the mounting member 5 to separate the locking member 6 from the corresponding moving member 7, so as to unlock the second movable part 32 and the first movable part 31.

[0051] It can be understood that the mounting member 5 can adopt a rod-shaped structure or a block-shaped structure, and the mounting member 5 provides a mounting platform for the locking member 6. The mounting member 5 and the first movable part 31 are relatively fixed. For example, the mounting member 5 can be fixedly connected to any first movable part 31; alternatively, the mounting member 5 is fixedly connected to both first movable parts 31; or, the mounting member 5 is fixed to the base 1. The mounting member 5 and the first movable part 31 are relatively fixed so that the locking member 6 can move relative to the movable part, realizing the unlocking of the locking member 6 and the movable part 7.

[0052] It can be understood that according to different adjustment methods of the length of the telescopic rod 3, the locking member 6 and the movable part 7 can have various structures, so that when the locking member 6 and the movable part 7 cooperate, the second movable part 32 and the first movable part 31 can be locked.

[0053] At present, the telescopic rod 3 mainly adopts two adjustment methods: stepless adjustment or stepped adjustment. Stepless adjustment generally means that the second movable part 32 and the first movable part 31 adopt a friction sliding method, and the second movable part 32 can move any distance along the first movable part 31 according to the use needs. Stepped adjustment generally means that the second movable part 32 can only move a specific distance X (or a distance of N times X) along the first movable part 31.

[0054] Based on different adjustment methods of the telescopic rod 3, the locking member 6 and the movable key 7 can adopt the following structures.

[0055] Exemplarily, when the telescopic rod 3 adopts stepless adjustment, the movable part 7 is a component of the second movable part 32, the locking member 6 is a positioning block (with an anti-slip rubber end), the positioning block is arranged facing the second movable part 32, the elastic member is a spring, and the spring can be arranged between the first movable part 31 and the positioning block. For example, when the spring is a tension spring, one end of the spring is fixed to the first movable part 31, and the other end of the spring is fixed to the positioning block. At this time, the tension provided by the spring presses the positioning block towards the second movable part 32. In the absence of external force, the positioning block will contact the second movable part. Of course, the spring can also be arranged between the positioning block and the mounting member 5. For example, when the spring is a compression spring, one end of the spring is fixed to the positioning block, and the other end of the spring is fixed to the mounting member 5. At this time, the spring provides pressure to press the positioning member towards the second movable part 32. In the absence of external force, the positioning block will contact the second movable part. No matter where the spring is arranged, as long as it is ensured that the positioning block contacts the second movable part 32 (this contact part is the movable part 7) under the action of the spring, and the positioning block is provided with a structure to increase friction. When the positioning block contacts the second movable part 32, it can limit the second movable part 32 and the first movable part 31, so that the telescopic rod 3 can have a certain anti-deformation (length) ability. When an external force acts on the positioning block and pulls the positioning block to separate the positioning block from the second movable part 32, the unlocking of the second movable part 32 and the first movable part 31 can be realized, so that the second movable part 32 can slide along the first movable part 31 to realize the adjustment of the length of the telescopic rod 3.

[0056] Exemplarily, when the telescopic rod 3 adopts stepwise adjustment, the moving member 7 is a plurality of positioning holes provided on the second movable portion 32, and the plurality of positioning holes are arranged at intervals along the moving direction of the second movable portion 32; the locking member 6 is a positioning pin, and the positioning pin can be inserted into any positioning hole to realize the clamping of the locking member 6 and the moving member 7; the elastic member is also a spring, and the spring can be arranged between the first movable portion 31 and the positioning pin, or the spring can also be arranged between the positioning pin and the mounting member 5. The setting method of the spring can refer to the above structure. When using a tension spring or a compression spring, there are different connection positions. It only needs to be ensured that the positioning pin can enter the positioning hole under the action of the spring. At this time, the positioning pin and the positioning hole are clamped, which can limit the second movable portion 32 and the first movable portion 31, so that the telescopic rod 3 can have a certain anti-deformation (length) ability. When an external force acts on the positioning pin and pulls the positioning pin to separate the positioning pin from the positioning hole, the unlocking of the second movable portion 32 and the first movable portion 31 can be realized, so as to facilitate the sliding of the second movable portion 32 along the first movable portion 31 and realize the adjustment of the length of the telescopic rod 3.

[0057] Therefore, according to different adjustment methods of the telescopic rod 3, locking members 6 and moving members 7 with different structures can be adopted. The locking member 6 and the moving member 7 cooperate to realize the locking of the second movable portion 32 and the first movable portion 31.

[0058] It can be understood that the mutual cooperation of the locking member 6, the moving member 7, and the elastic member of each locking assembly can realize the self-locking of the second movable portion 32 and the first movable portion 31 on a telescopic rod 3 without external force. In the present invention, two telescopic rods 3 are provided. In order to enable the two telescopic rods 3 to be unlocked synchronously and the unlocking method needs to be convenient for the operator to operate. In the present invention, the two locking members 6 are arranged adjacent to each other. Since the locking member 6 can have various structures, for this reason, the two locking members 6 being arranged adjacent to each other can be that the two locking members 6 are partially adjacent.

[0059] The setting positions of the two locking members 6 enable one hand of the operator to synchronously control the two locking members 6. Then, the two locking members 6 can move along the mounting member 5 synchronously under the same external force, so that the locking members 6 are separated from the corresponding moving members 7, realizing the unlocking of the second movable portion 32 and the corresponding first movable portion 31, thereby realizing the unlocking of the two telescopic rods 3, facilitating the adjustment of the lengths of the two telescopic rods 3, and further adjusting the use height of the panel 2 connected to the telescopic rods 3. When the external force acting on the two locking members 6 disappears, the locking member 7 can cooperate with the corresponding moving member 7 under the action of the corresponding elastic member to ensure the locking of the second movable portion 32 and the corresponding first movable portion 31, thereby limiting the length of the telescopic rod 3 and preventing the length of the telescopic rod 3 from changing in the non-adjustment state, ensuring the normal use of the panel 2 connected to the telescopic rod 3.

[0060] The utility model adopts two telescopic rods 3, which can improve the stability of the entire lifting bracket. At the same time, on the basis of the two telescopic rods 3, the lifting bracket is also provided with a synchronous adjustment mechanism, which can be used to synchronously unlock or lock the two telescopic rods 3, facilitating the synchronous lifting of the two telescopic rods 3, reducing the adjustment difficulty of the double-rod lifting bracket, and making the use of the double-rod lifting bracket more convenient.

[0061] In another embodiment of the present utility model, a specific structure of a moving member 7 and a locking member 6 is provided to ensure that the moving member 7 and the locking member 6 can cooperate with each other. Specifically, as Figure 4 , 7 shown, the moving member 7 includes a limit rack, the limit rack is connected to the second movable part 32, and the length direction of the limit rack is arranged along the moving direction of the second movable part 32; the locking member 6 includes at least one limit tooth 64, the limit tooth 64 is perpendicular to the length direction of the limit rack, and is in plug-in fit with the limit rack. A plurality of tooth grooves 71 are provided on the limit rack. When the limit tooth 64 and the limit rack are in plug-in fit, the limit tooth 64 can be plugged into any tooth groove 71 within the telescopic range of the entire telescopic rod 3. For the convenience of manufacturing or aesthetics, the tooth groove arrangement at the end of the limit rack may exceed the telescopic range of the telescopic rod 3, and any tooth groove described later only represents any tooth groove within the telescopic range.

[0062] The tooth groove 71 can adopt a rectangular groove structure, a dovetail groove structure, etc., to ensure that when the limit tooth 64 is plugged into any tooth groove 71, the limit of the limit rack can be realized, so as to ensure the limit of the second movable part 32 and the first movable part 31, limit the length of the telescopic rod 3, and when there is no external force to change the position of the limit tooth 64, the length of the telescopic rod 3 can be maintained at the corresponding length for use. The limit rack has a continuous plurality of tooth grooves 71, and the distance between two adjacent tooth grooves 71 is small, which means that when the second movable part 32 moves along the first movable part 31, small-distance movement can be realized, so that the length of the entire telescopic rod 3 can be changed within a small range, ensuring that the adjustment of the telescopic rod 3 can meet the use of different consumers.

[0063] In another embodiment of the present utility model, in order to enable the locking member 6 to slide on the mounting member 5 and also to facilitate the operator to apply an external force to the locking member 6, the locking member 6 further includes a sliding part 62 and an operating part 61 which are connected to each other. The sliding part 62 is slidably connected to the mounting member 5, the operating part 61 protrudes outward or recesses inward along the mounting member 5, and the two operating parts 61 are arranged at intervals on the mounting member 5.

[0064] The limiting engaging teeth 64, the sliding part 62 and the operating part 61 are connected in sequence to form an integrated locking member 6. The structure of the sliding part 62 is set according to its connection mode with the mounting member 5. For example, a positioning sliding groove is provided on the mounting member 5, and the sliding part 62 can adopt a slider clamped in the positioning sliding groove, so as to realize the sliding fit between the sliding part 62 and the mounting member 5. The operating part 61 is set in a plate-like structure or a block-like structure. The operating part 61 is protruded outward or recessed inward along the mounting member 5, so that a structure similar to a notch can be formed between the operating part 61 and the mounting member 5, so that the operator can accurately apply an external force (finger) on the operating part 61 to drive the entire locking member 6 to move. The elastic member can adopt a tension spring or a compression spring, and ensure that the limiting engaging teeth 64 can be extruded towards the limiting rack and clamped with the corresponding tooth groove 71.

[0065] In this embodiment, as Figure 9 , 10 shown, the sliding part 62 is in a strip-shaped groove structure. The limiting engaging teeth 64 are located at one end of the sliding part 62 and protrude outward along the length direction of the sliding part 62 and are fixed to the sliding part 62; the operating part 61 is arranged at the other end of the sliding part 62 and protrudes outward in a direction perpendicular to the length direction of the sliding part 62. The locking member 6 with this structure is convenient for its sliding connection with the mounting member 5 and is also convenient for applying an external force on the locking member 6.

[0066] In another embodiment of the present utility model, for the convenience of installing the locking member 6, the mounting member 5 is a hollow mounting rod. The mounting rod is located between the two first moving parts 31 and is vertically fixed to the two first moving parts 31 respectively. The two ends of the mounting rod are respectively communicated with the inner cavities of the first moving parts 31. The two locking members 6 are respectively located at both ends of the mounting rod and are correspondingly connected to the mounting rod. The moving member 7 is on the second moving part 32 and is arranged in the direction towards the mounting rod; the elastic member is located between the mounting rod and the locking member 6, or the elastic member is located between the two locking members 6.

[0067] As Figure 4 , 8 shown, the mounting rod is horizontally arranged. The mounting rod is formed by buckling and connecting two cover plates 51. The two cover plates 51 are detachably connected by bolts to facilitate the installation of the locking member 6 and the elastic member inside the mounting rod. Among them, one cover plate 51 is fixedly connected to the two first moving parts 31. The two operating parts 61 are arranged at intervals near the middle of the mounting rod. The operating parts 61 extend out of the mounting rod and at least part of them are located outside the mounting rod. A notch 54 for the movement of the operating part 61 is provided on the mounting rod. The elastic member adopts a compression spring. The two compression springs are both arranged between the two operating parts 61. Under the action of the compression springs, the two locking members 6 can be respectively matched with the corresponding moving members 7. Or, the two compression springs are arranged at intervals, and each compression spring is respectively arranged between the sliding part 62 and the mounting rod. No matter the installation position of the spring and whether it adopts a compression spring or a tension spring and other forms, it is only necessary to ensure that the limiting engaging teeth 64 can be extruded towards the limiting rack and clamped with the corresponding tooth groove 71.

[0068] In another embodiment of the present utility model, in combination with the specific structures of the moving member 7 and the locking member 6, and the specific structure of the mounting member 5, the setting position of the locking member 6 on the mounting member 5 is defined in this embodiment. Specifically, the limiting teeth 64 are telescopically arranged at the end of the mounting rod, the sliding portion 62 is connected to the limiting teeth 64, and a sliding groove 53 slidably connected to the sliding portion 62 is provided inside the mounting rod. The sliding portion 62 slides along the sliding groove 53 to drive the limiting teeth 64 to expand and contract.

[0069] As Figure 4 、 8 shown, a sliding groove 53 for the limiting sliding of the sliding portion 62 is provided inside the mounting rod, a connecting block 52 extending into the sliding portion 62 is provided on the mounting rod, a pin 63 is provided inside the sliding portion 62, the elastic member is a spring, and the spring (not shown in the figure) is clamped between the pin 63 and the connecting block 52 and is fixed to the pin 63 and the connecting block 52 respectively. When there is no external force, the spring is in a compressed state, so the limiting teeth 64 are clamped with the limiting rack under the action of the spring, restricting the second movable portion 32 from moving along the first movable portion 31. When an external force is applied to the operating portion 61 to move the operating portion 61, it drives the limiting teeth 64 to contract towards the inside of the mounting rod, separating the limiting teeth 64 from the limiting rack, unlocking the second movable portion 32 and the first movable portion 31, and the second movable portion 32 can slide with the first movable portion 31.

[0070] In another embodiment, a compression spring can also be installed between the two operating portions 61. The compression spring applies an elastic stress to the two operating portions 61 on both sides, so the limiting teeth 64 are clamped with the limiting rack under the action of the spring, restricting the second movable portion 32 from moving along the first movable portion 31. When an external force is applied to the operating portion 61 to move the operating portion 61, it drives the limiting teeth 64 to contract towards the inside of the mounting rod, separating the limiting teeth 64 from the limiting rack, unlocking the second movable portion 32 and the first movable portion 31, and the second movable portion 32 can slide with the first movable portion 31.

[0071] Due to the existence of the elastic member, when an external force is applied to the operating portion 61 and after the external force acting on the operating portion 61 is withdrawn, the sliding portion 62 can slide along the sliding groove 53 to drive the limiting teeth 64 to expand and contract.

[0072] In another embodiment of the present utility model, to facilitate the use of the double-rod lifting bracket, when increasing the length of the telescopic rod 3, it is possible to increase the length of the telescopic rod 3 without external force operating the locking member 6. In this embodiment, the structures of the limiting rack and the limiting teeth 64 are defined. Specifically, as Figure 4 、 7As shown in FIGS. 9 and 10, each tooth groove 71 of the limit rack includes a guiding side wall 712 and a supporting side wall 711, and the guiding side wall 712 and the supporting side wall 711 are arranged at intervals along the length direction of the limit rack; the limit engaging tooth 64 has a supporting plane 641 for cooperating with the supporting side wall 711 and a sliding inclined plane 642 for cooperating with the guiding side wall 712; the second movable part 32 moves in a direction away from the first movable part 31, driving the limit rack to move, so that each guiding side wall 712 cooperates with the sliding inclined plane 642 in sequence, causing the limit engaging tooth 64 to reciprocate under the action of the elastic member and sequentially inserting into the next tooth groove 71 in the moving direction of the limit rack; under the action of the elastic member, the locking member 6 causes the limit engaging tooth 64 to extend into the next tooth groove 71 of the limit rack, and the supporting side wall 711 cooperates with the supporting plane 641 to limit the second movable part 32 from moving towards the first movable part 31.

[0073] In this embodiment, the structures of the limit engaging tooth 64 and the limit rack are defined. When the second movable part 32 moves outward along the first movable part 31, the guiding side wall 712 of the tooth groove 71 cooperating with the limit engaging tooth 64 fits and slides with the sliding inclined plane 642 of the limit engaging tooth 64, and the limit engaging tooth 64 (locking member 6) presses the elastic member, so that the limit engaging tooth 64 contracts inward along the end of the mounting rod; when the second movable part 32 continues to move, the tooth groove 71 at the next position in the moving direction cooperates with the limit engaging tooth 64. At this time, there is a gap between the bottom of the tooth groove 71 and the limit engaging tooth 64. Under the action of the elastic member recovering its deformation, the limit engaging tooth 64 will enter the tooth groove 71 and be inserted and cooperated with the tooth groove 71. If the second movable part 32 continues to move, the cooperation process between the tooth groove 71 and the limit engaging tooth 64 will repeat the cooperation process between the tooth groove 71 at the previous position in the moving direction and the limit engaging tooth 64. Repeating like this, when the second movable part 32 moves outward along the first movable part 31, the limit engaging tooth 64 is telescopically arranged on the mounting rod under the action of the elastic member. When the second movable part 32 moves outward along the first movable part 31, the limit engaging tooth 64 does not limit the movement of the limit rack, so that when the length of the telescopic rod 3 increases (the height of the panel 2 increases), it can be set according to the use requirements.

[0074] Due to the cooperation between the supporting side wall 711 and the supporting plane 641, in the absence of external force, it can prevent the second movable part 32 from moving towards the first movable part 31, ensuring that the length of the telescopic rod 3 remains unchanged for the normal use of the reading stand. This setting method is more convenient for adjusting the length of the telescopic rod 3. By lifting the panel 2 with one hand, the height of the panel 2 can be increased, making the operation of raising the height of the panel 2 more convenient.

[0075] In another embodiment of the present invention, a sliding limit member is provided between the first movable part 31 and the second movable part 32, and the sliding limit member is used to prevent the second movable part 32 and the first movable part 31 from separating.

[0076] In this embodiment, as Figure 4 shown, the sliding limiting member includes a positioning protrusion 311 and an elastic card 321. The positioning protrusion 311 has a strip-shaped groove structure, and the positioning protrusion 311 is close to the upper end of the first movable portion 31. The elastic card 321 is disposed on the second movable portion 32 and is close to the lower end of the second movable portion 32. The cooperation between the elastic card 321 and the positioning protrusion 311 can prevent the second movable portion 32 from separating from the first movable portion 31 when the second movable portion 32 moves along the first movable portion 31, so as to limit the maximum elongation of the second movable portion 32 along the first movable portion 31.

[0077] To enable the base 1 and the panel 2 of the reading stand to have more usage functions, in another embodiment of the present utility model, the base 1 has a U-shaped structure. The base 1 includes a bottom plate 12 and two auxiliary support plates 11. The telescopic rod 3 is located on one side of the bottom plate 12, and one end of the telescopic rod 3 is perpendicularly fixed to the bottom plate 12. The two auxiliary support plates 11 are located on the other side of the bottom plate 12 and are respectively rotatably connected to the bottom plate 12. The auxiliary support plate 11 rotates along the bottom plate 12 so that the base 1 has a closed state and an open state, and the base 1 can be switched between the closed state and the open state.

[0078] As Figure 2 、 3 、4, and 7 shown, the lower end of the telescopic rod 3 is the first movable portion 31. The lower end of the first movable portion 31 is provided with an opening, and the opening end is communicated with and fixed to the bottom plate 12 to form an integral structure. The auxiliary support plate 11 is below the bottom plate 12 and is hinged to the bottom plate 12. A receiving groove 13 is further provided at the bottom of the bottom plate 12, and one end of the auxiliary support plate 11 is hinged in the receiving groove 13 of the bottom plate 12.

[0079] As Figure 11 shown, the hinged manner of the auxiliary support plate 11 and the bottom plate 12 is a common hinged manner in the prior art, such as pin hinge, bolt hinge, etc., as long as the hinged function can be realized. The receiving groove 13 can receive the auxiliary support plate 11 therein when the U-shaped base 1 is in the closed state. The inner wall of the receiving groove 13 can play a limiting role on the auxiliary support plate 11, and there is no need to design a separate limiting structure. It is not only beautiful in design, convenient for storage, but also simple in structure and easy to operate. The U-shaped base 1 has a closed state and an open state and can be switched between the closed state and the open state. The two auxiliary support plates 11 can not only expand the support area of the bottom plate 12 and increase the overall support stability of the base 1.

[0080] To further increase the usage functions of the reading stand, in another embodiment of the present utility model, the panel 2 is connected to the telescopic rod 3 through the connecting seat 4. The telescopic rod 3 is located on one side of the panel 2, and a bottom support 23 is provided at the lower end on the other side of the panel 2 for placing books. At least one book clip 21 and / or at least one auxiliary support rod 22 are provided on the other side of the panel 2. The auxiliary support rod 22 rotates with the panel 2 to increase the support area of the panel 2.

[0081] As Figure 1 , 2 , as shown in Figure 3, the upper end of the telescopic rod 3 in this application is the second movable part 32. Therefore, a connecting seat 4 is provided at the upper end of the second movable part 32. The connecting seat 4 includes at least one collar, and at least one positioning ring 24 that cooperates with the collar is provided on the panel 2. The positioning ring 24 and the collar are fixed by a butterfly bolt 41 and a nut. By adjusting the tightening degree of the butterfly bolt 41 and the nut, the distance between the collar and the positioning ring 24 can be adjusted to ensure that the positioning ring 24 rotates with damping along the collar, and further realize the damping rotation of the panel 2 along the upper end of the telescopic rod 3, for adjusting the tilt angle of the panel 2, facilitating the adjustment of the tilt position of the book placed on the panel 2, which is beneficial for the user to read.

[0082] The book clip 21 is connected to the panel 2, and the book clip 21 is used to fix the book cover to prevent the book from closing under the action of inertia. To improve the fixing effect of the book clip 21 on the book, two book clips 21 are provided opposite to each other, and the two book clips 21 are arranged vertically offset on the surface of the panel 2.

[0083] Optionally, the connection method between the auxiliary support rod 22 and the panel 2 can refer to the connection method between the auxiliary support plate 11 and the bottom plate 12. The auxiliary support rod 22 is used to increase the support area of the panel 2 and can place books with a larger volume. In this application, there are two auxiliary support rods 22, and the two auxiliary support rods 22 are distributed on the surface of the panel 2 and are arranged close to the upper end of the panel 2. One end of the two auxiliary support rods 22 is hinged to the panel 2, and the other ends rotate relative to each other, so that the panel 2 also has a deployed state and a folded state. When the panel 2 is in the deployed state, it can be used to place books with a larger area, which is convenient for reading the books. When the panel 2 is in the folded state, it can place books with a medium or small area.

[0084] The panel 2 of this application has more diverse usage functions compared to the conventional panel 2 (the panel 2 only provided with the bottom support 23), can meet different usage requirements, and has a wider application range.

[0085] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above description is only for the specific implementation methods of the present utility model and is not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the gist of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A double-rod lifting bracket, characterized in that, It includes a synchronous adjustment mechanism and two telescopic rods (3) arranged side by side. The synchronous adjustment mechanism is located between the two telescopic rods (3). The telescopic rod (3) includes a first movable part (31) and a second movable part (32). The second movable part (32) moves along the first movable part (31) to change the length of the telescopic rod (3). The synchronous adjustment mechanism includes a mounting member (5) and two locking components. The mounting member (5) is relatively fixed to the first movable part (31), and the two locking components are respectively used in cooperation with the two second movable parts (32). The locking component includes a movable part (7), a locking part (6), and an elastic part. The movable part (7) is arranged on the second movable part (32). The locking part (6) is slidably connected to the mounting member (5). The elastic part is used to make the locking part (6) cooperate with the movable part (7) to lock the second movable part (32) and the first movable part (31). Under the action of the same external force, the two locking parts (6) slide synchronously on the mounting member (5) to separate the locking part (6) from the corresponding movable part (7), so as to unlock the second movable part (32) and the first movable part (31).

2. The double-rod lifting bracket according to claim 1, wherein, The movable part (7) includes a limit rack. The limit rack is arranged on the second movable part (32), and the length direction of the limit rack is arranged along the moving direction of the second movable part (32). The locking part (6) includes at least one limit tooth (64). The limit tooth (64) is perpendicular to the length direction of the limit rack and is inserted and matched with the limit rack.

3. The double-rod lifting bracket according to claim 2, wherein, The locking part (6) further includes a sliding part (62) and an operating part (61) connected to each other. The sliding part (62) is slidably connected to the mounting member (5). The operating part (61) protrudes outward or recesses inward along the mounting member (5). The two operating parts (61) are arranged at intervals on the mounting member (5).

4. The double-rod lifting bracket according to claim 3, characterized in that, The mounting member (5) includes a hollow mounting rod. The mounting rod is located between the two first movable parts (31) and is respectively connected to the two first movable parts (31). The two locking parts (6) are respectively located at both ends of the mounting rod.

5. The double-rod lifting bracket according to claim 4, characterized in that, The limit tooth (64) is telescopically arranged at the end of the mounting rod. The sliding part (62) is connected to the limit tooth (64). A sliding groove (53) slidably connected to the sliding part (62) is arranged inside the mounting rod. The sliding part (62) slides along the sliding groove (53) to drive the limit tooth (64) to expand and contract.

6. The double-rod lifting bracket according to any one of claims 2-5, characterized in that, The limit rack has a plurality of tooth grooves (71). Each tooth groove (71) includes a guiding side wall (712) and a supporting side wall (711). The guiding side wall (712) and the supporting side wall (711) are arranged at intervals along the length direction of the limit rack. The limit tooth (64) has a supporting plane (641) used in cooperation with the supporting side wall (711) and a sliding inclined plane (642) used in cooperation with the guiding side wall (712). The second movable part (32) moves along the direction away from the first movable part (31), driving the limit rack to move, so that each guiding side wall (712) is sequentially matched with the sliding inclined plane (642), causing the limit tooth (64) to reciprocate under the action of the elastic part and be sequentially inserted into the next tooth groove (71) in the moving direction of the limit rack. Under the action of the elastic member, the locking member (6) causes the limit locking teeth (64) to extend into the next tooth groove (71) of the limit rack, and the supporting side wall (711) cooperates with the supporting plane (641) to limit the movement of the second movable part (32) in the direction towards the first movable part (31).

7. The double-rod lifting bracket according to claim 6, characterized in that, A sliding limit member is provided between the first movable part (31) and the second movable part (32), and the sliding limit member is used to prevent the second movable part (32) from separating from the first movable part (31).

8. A reading stand, characterized in that, It includes the double-rod lifting bracket according to any one of claims 1-7, and further includes a panel (2) and a base (1). The two telescopic rods (3) are located between the base (1) and the panel (2) and are used to adjust the distance between the panel (2) and the base (1).

9. The reading stand according to claim 8, wherein The base (1) has a U-shaped structure. The base (1) includes a bottom plate (12) and two auxiliary support plates (11). The telescopic rod (3) is located on one side of the bottom plate (12), and one end of the telescopic rod (3) is perpendicularly fixed to the bottom plate (12). The two auxiliary support plates (11) are located on the other side of the bottom plate (12) and are respectively rotatably connected to the bottom plate (12). The auxiliary support plate (11) rotates along the bottom plate (12) so that the base (1) has a closed state and an open state, and the base (1) can be switched between the closed state and the open state.

10. The reading stand according to claim 8 or 9, characterized in that, The telescopic rod (3) is located on one side of the panel (2), and the other end of the telescopic rod (3) is rotatably connected to the panel (2).

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