RU2711135C1 - Adjustable device for sitting or standing ("versions") - Google Patents

Abstract

FIELD: satisfaction of human vital needs.SUBSTANCE: invention relates to devices for sitting or standing operation, can be used in all industries, in all educational institutions and in everyday life for work on computer. Adjustable device for sitting or standing operation comprises a tabletop provided with a mechanism for changing its height, where the table top is rigidly connected to a rod of a vertically arranged pneumatic cylinder, which covers are rigidly connected to the transition elements, lower planes of which rest on the scale of the vertical support, the axis of which is parallel to the axis of the pneumatic cylinder and is with it in one plane, where the holes of the transition elements, as well as the holes of the plates, go beyond the dimensions of the section of the vertical support, wherein plates, resting on vertical support on opposite side from contact surface of transition elements, are connected through their holes and holes of transition elements by fasteners, and pneumatic cylinder is connected by flexible universal pneumatic line with switch connected via flexible pneumatic line to pressure source. In the second version of the device, the pneumatic cylinder is connected by a flexible universal pneumatic line with a connector connected to the exhaust switch and a pressure switch connected through a pressure pneumatic line to the pressure source. In the third version, inlet and outlet of pneumatic cylinder are connected by flexible inlet and outlet pneumatic lines with flow switch connected to pressure switch connected to pressure source.EFFECT: invention is aimed at improving the tabletop level fixation reliability at any allowable height.3 cl, 4 dwg

Description

FIELD OF THE INVENTION

This technical solution relates to furniture intended for the organization of the workplace, and can be applied in all areas of industry and other industries. In addition, it can be used in all educational institutions, in everyday life for working on a computer, training, etc.

State of the art

An analogue of this technical solution is the "Adjustable table for personal computers" (patent for invention RU No. 1812959 priority of 04/30/1993). The presence of two working surfaces, adjustable in height, makes it necessary to spend additional time, which increases the time to reach the operating mode. “Regulation of the position of the surfaces in height is carried out by rotating the handwheel”, which takes a lot of working time, because when changing the position of the table from the work position, sitting on the work position, standing, you must again rotate the handwheel. In addition, the rotation of the handwheel must be carried out when adjusting to the required height of the user, which also takes a lot of time. The “nut-screw” connection itself initially lays a low speed for moving the countertops. The absence of a scale increases the setup time by the required height of the countertop. The presence of two working surfaces on a horizontal frame mounted using a bracket, rigid connection of the horizontal frame with the spindle, which is threaded by the threaded part of the handwheel installed in the socket of the base stand, as well as the design of fixing the horizontal frame from turning around the axis of the spindle, are all this makes the design of the adjustable table and the large time for adjusting the rise (lowering) of the countertop, etc. quite complicated. This complex design does not allow you to quickly and accurately adjust once depending on any anthropometric data of the user, as well as to quickly raise and lower the countertops.

Another analogue of the proposed technical solution is "Computer stand" (US patent No. 5419525 priority of 05/30/1995). The disadvantage of this stand is that every time you need to change the position of the countertop, you must "manually" unlock it first and then fix it, which increases the setup time (and this must be done every time the user decides to work standing or sitting). The location of the fixing holes with a certain step does not allow employees with height who do not agree with the range of fixing holes to work on this computer stand. Manual lifting (lowering) of the countertop itself takes a lot of time. Since in order to unlock (fix) the countertop, you need to stand up, approach the computer stand from the side, or from the back and with one hand hold the countertop, and with the other hand make the fixation (unlocking). This operation can be done alone only if the user is working with a laptop. If there is a separate monitor or two monitors on the countertop, then the operation for unlocking, lifting and fixing the countertop must be done only by two, otherwise the monitors can be damaged. Since they have limited stability, and when lifting (lowering), fixing (unlocking), you can not calculate the smoothness of lifting (lowering), especially when a person is tired. And if the user changes the position of the countertop 8 times a day, then it turns out that a lot of time will be spent on this. Such a complex design does not allow users with different anthropometric data to work on it due to the lack of a device for precise adjustment, and therefore does not allow to fulfill the ergonomics and SanPiN requirements in terms of proper fit when working at a computer, namely:

- during operation, the wrist and hand should lie in the same plane;

- there should be a clearance between the table top and legs;

- the milestone of the monitor should be located above eye level;

- there should be a right angle in the elbow joint;

- during operation, arms and legs should be parallel to the floor. Another analogue is the "Adjustable table" (patent for the invention RU No. 2090128, C1, priority dated 12/05/1995). According to paragraph 1 of the claims, the design of this adjustable table is quite complex and limits the scope of its application, namely, only for aviation and astronautics as devices for the training and operation of dispatchers. The design of the table does not allow: to adjust the height of the countertop depending on the height of the user when working in the "sitting - standing" position (since this is not structurally provided); use it in production, in everyday life, etc.

The next analogue is the “Adjustable table” patent for utility model No. 61995, priority dated July 4, 2005. It is supposed to raise and lower the table “manually” by removing (twisting) the fixing elements and manually lifting the table top. Which is time consuming. Since every time you need to raise (or lower) the countertop, you need to raise the countertop, remove the lock to raise the countertop and fix it. In addition, the design of the table does not allow: to adjust the height of the countertop for any height of the user; to make precise table adjustments in a short period of time, to quickly raise and lower the countertops, and to comply with the norms of ergonomics and SanPiN, etc.

Another analogue is the “Adjustable table” patent for utility model No. 50775, priority dated July 13, 2005. The table design and lifting adjustment are similar to the previous patent, as well as the disadvantages.

Another analogue is the "Adjustable table" patent for invention No. 23211324 priority dated August 17, 2005. A table including a guide assembly 3 with support racks 4 is not a simple design, especially in manufacture. Because that there is no jamming and the electric motor does not burn out, it is necessary that: the inner surfaces of the support posts 4 are parallel with micron accuracy, and for this it is necessary to add support and adjusting ties to the existing structure (which will be needed for support posts 2, since the guides 3, which are installed on them must have a size outside with parallelism, calculated in microns); Lubrication will also be necessary, both for guides and for screw-nut connections, which will need to be closed with special devices, and these are additional components and parts that are not in the existing design. Thus, the design is quite complicated. It is known that electric tables have a high lifting speed. In addition, it is very difficult to precisely stop the engine at the height of the table, corresponding to a certain growth, and therefore the user will have to constantly turn the electric motor on and off (which is fraught with its not prolonged operation) and will take a lot of time. The absence of a scale increases the setup time by the necessary amount of elevation of the tabletop height. The lack of precise adjustment in the design for any height of the user does not allow to comply with the norms of ergonomics and SanPiN.

Another analogue is the “Adjustable table”, patent for invention RU No. 2354274, priority dated March 15, 2007, IPC: C 2 .. Adjusting the height of the table depending on the user's height takes a lot of time due to: low table movement speed compared with a pneumatic cylinder (it is known that tables with an electric drive have a lifting speed of 30 mm / s, and tables with a pneumatic drive 50-800 mm / s, as evidenced by the experience of using US adjustable tables, see INTERNET); the difficulty of stopping the motor - reducer in the position when it is necessary (that is, it will really be necessary to either raise the gear motor or lower it), which will take a lot of time; the lack of a scale increases the setup time by the necessary amount of elevation of the tabletop height; lack of a device for fine adjustment to the user's height. In addition, adjustment errors will be significant. The complex design of the table does not allow for precise adjustment of the table for work "sitting" or "standing" for a short period of time and to comply with the rules of ergonomics and SanPiN, etc.

The next analogue is the “Table with an adjustable tabletop” patent for utility model of the Russian Federation No. 88919, priority date 06/25/2009. This complex design has the same disadvantages as the previously described designs with telescopic racks and height adjustment due to holes and clips.

Another analogue is the “Adjustable table” (patent for utility model of the Russian Federation No. 113931, priority dated November 21, 2011). This complex design involves the rotation of either one worm gear 9 or the second worm gear 9. In addition to the time it takes to rotate the worm gear 9, you will have to spend time moving to each mechanism and checking the level of the height of lifting or lowering the countertop. These operations will need to be done both when lifting and when lowering the table, which will take up a lot of time. The device requires a large space for its placement, since with the divergence of the legs will be extended to a sufficient length. The legs themselves create in this case unsafe working conditions, because it will be necessary to step over periodically and constantly think about not tripping and falling, not only to the user himself, but also to other employees.

The next analogue is the “Adjustable Table” patent for utility model of the Russian Federation No. 140418, priority dated March 25, 2013. The complexity of the design is confirmed by its composition, connections, etc. The height adjustment of the tables is carried out by two latches ("each telescopic connection of the side racks is fastened with at least two latches"). The worktop made of chipboard is already heavy in itself, and even pipes of rectangular cross section make the structure such that it is possible to fix (unfasten) only together, which takes a lot of time. The location of the fixation holes with a certain step does not allow people with growth who do not agree with the range of fixation holes or to work in violation of ergonomic requirements (which negatively affects both the results of work and the user's health). That is, this adjustable table does not allow for precise table adjustment in a short period of time and to comply with the norms of ergonomics and SanPiN, since there is no exact adjustment of the height of the tabletop.

The closest in technical essence to the analogue (prototype) of the claimed technical solution is the "Table with adjustable height" patent for utility model No. 135501, priority from 06/05/2013, IPC: А47В. The proposed device has similar features with the prototype, namely: a vertical support and countertop equipped with a mechanism for changing its height. In accordance with the first paragraph of the formula and sections of the description for the "opening of the countertops you need to make an effort ...". This entails: an increase in the time for lifting the countertops (which is not available in the proposed device, since the lifting of the countertops is carried out using a pneumatic cylinder, controls (pneumatic valves, buttons, etc.), a pressure source or a pneumatic line. Location of fixing holes with a certain prototype pitch it does not allow employees with growth to be inconsistent with the range of holes for fixing or to work in violation of ergonomic requirements (which negatively affects both the results of work, and the user's health.) That is, the prototype table allows you to adjust the height only for users with a certain height and the prototype design does not allow adjustments for any height of the user. In addition, to raise the countertop to the height necessary for the user, you need to: first unscrew the locking screw, remove it, then lift the countertop with six telescopic legs and a “gas cartridge” (s), align the threaded hole with the hole in the leg (which is extremely inconvenient and long to do one use body and even two), insert the locking screw and lock. Which also takes a lot of time. The design of the "gas cartridge" and the design of the legs assembled with telescopic pipes has manufacturing errors that are not compensated for by anything (in the proposed device, manufacturing errors are compensated by adjusting the height of the tabletop) and affect the accuracy of the height of the table. In order for them to work, the telescopic pipes must have limiters located exactly perpendicular to the pipe axis inside the pipe. And these limiters having manufacturing errors along with manufacturing errors of the pipes themselves and the gaps between them will not allow them to compensate in the end. In addition, additional errors will occur due to two legs and inaccurate drilling of threaded holes. Therefore, the design of the prototype allows you to make only a rough adjustment with errors calculated in millimeters, and even under the limited growth of users. While in the proposed device, the adjustment accuracy is quite high, because it is adjusted according to a precisely made scale and the device has a rigid structure (the tabletop and transition elements are rigidly connected to the pneumatic cylinder; the pneumatic cylinder itself is a rigid module that is fixedly fixed after adjustment) and has exactly manufactured parts included in it (for example, a radial runout of a piston diameter of 0.03 mm, an end face of 0.05 mm, etc.). And modern methods for manufacturing scales allow them to be made fairly accurate, for example, even with a reduced level of accuracy, the error in the linear dimensions of the scale is 5-10 microns (or 0.005-0.01 mm). That is, the error of adjustment of the proposed device is an order of magnitude less than that of the prototype.

The design of the vertical support of the prototype, and the table as a whole, is quite complicated (six telescopic pipes, while the proposed device has only one simple pipe (vertical support); the crossbar, vacuum suction cups, lever, etc., which the proposed device does not have and does not exclude jamming when using one gas cartridge, because the pipes 2a, 2b, 2c have a large variation in tolerances (both outside and inside in the delivery state) and, as a result, there will be large gaps between these pipes. pipes 2c with the pipe 2b with locking screws 7, it is necessary to make holes in the pipes 2c with a tolerance.As a result, at the end of legs 2 (telescopic pipes 2a) there will be deviations calculated in millimeters (both on one leg and on the other). Also, the design does not provide rigidity and accuracy , and even if it will be assembled on a special plate (having minimal non-flatness) when installed on the floor, it will not be stable. Since there are no ideal floors, vacuum suction cups will not work. Therefore, the author introduced two gas cartridges paragraph 5 of the formula, hoping that two gas cartridges will overpower the resulting distortions, while complicating the already complex design. As for adjusting the height of the table, without the lever of the gas cartridge (indicated in paragraph 2 of the formula as an embodiment), the design does not allow you to adjust to any height of the user, but only within the threaded holes. It is possible to adjust the lifting height using pipes and fasteners only together (when one raises the countertop, and the second person catches the threaded hole and tightens screw 7), which takes a considerable time. The introduction of the lever for the gas cartridge specified in the second paragraph of the prototype formula does not solve the adjustment problem. Because the introduction of the lever provides for the introduction of another device control device (which will act on the lever) and a number of other details that are not in the design of the prototype. Even if the prototype had a lever with a valve and other details (a modernized "gas cartridge"), the design still does not provide a quick and accurate lift to the required height. Because it’s problematic to precisely stop the gas cartridge at the required point with a lever (it’s still not known at what point it is necessary to stop, since there is no scale). And it will be necessary to lift the lever up or down to achieve the desired position of the table (moreover, this operation will always have to be done when it is necessary to raise the table and if the user does this 8 times during the working day, then the time runs up decent). What is not in the proposed device (since the piston of the pneumatic cylinder works constantly until it stops in the front cover, and the lifting height is set in advance on a scale depending on the user's height and it is not necessary to “catch” the required height with the lever each time). The gas-cartridge design, in comparison with the pneumatic cylinder, is more complex and less reliable, as it has an airtight shell and other design features. The prototype description section states that "... gas cartridges, as a rule, can withstand 100 thousand cycles ...", while pneumatic cylinders, for example, type PC ... ISO6431 of the Moscow plant of Pnevmoapparat LLC have a working life of 4000 km, which is more than an order exceeds the resource of gas-cartridge type devices. In addition, this adjustable table does not allow for precise table adjustment in a short period of time and to comply with the norms of ergonomics and SanPiN, since there is no precise adjustment of the height of the tabletop.

Thus, the proposed technical solutions can be obtained in comparison with the prototype and analogues:

- more simple and reliable design;

- more precise adjustment of the height of the countertop, depending on any height of a person;

- less adjustment time;

- less time for lifting the countertops;

- A simpler mechanism for moving and fixing the countertops.

In addition, the proposed technical solutions allow us to comply with the norms of ergonomics, SanPiN and will provide additional technical results that are absent from the prototype and analogues.

Disclosure of Invention

An adjustable device for work, sitting or standing (hereinafter referred to as the device), contains a worktop equipped with a mechanism for changing its height (basic design) and other structural elements that have significant differences in each embodiment.

The aim of creating the proposed technical solutions is to create a simple design that ensures the exact height of the lifting and lowering of the countertop, depending on any anthropometric data of a person and quick readjustment to other initial values.

In addition, the devices allow: to make the tabletop more compact, especially for a laptop; make the device more compact as a whole; save energy; reduce weight and dimensions; increase reliability (due to: a very simple design of the device and the parts included in it; more accurate manufacturing of parts, for example, a pneumatic cylinder; due to a stationary pneumatic cylinder, and not as, for example, a device with a gas-cartridge system on the eye); occupy smaller areas (which is especially important for enterprises leasing space, for example, in industrial parks, business incubators, etc.); integrate into existing tables (including computer ones); be completely autonomous and not requiring energy costs; to have free access for repair (which cannot be said about devices using the gas-cartridge system, since in the event of depressurization or valve repair, you will have to disassemble the entire device, which entails the great complexity of the repair); have a higher lifting speed of the countertop compared to electric and similar devices; precisely adapt to any growth, without requiring constant adjustment; lift a lot of weight; refuse to use computer desks; allows you to use an additional group of human muscles (providing training for muscle groups), which allows to increase the physical activity of a person, which increases productivity, user speed and, accordingly, the speed of the entire device; to compensate for manufacturing errors (for example, manufacturing errors of a pneumatic cylinder (in particular, stroke) due to the possibility of adjusting the lift height); more convenient operation due to the location of the controls either on the countertop or at the end, and not under the countertop (where the control handle must be looked for, as is done in today's manufactured tables); increase the resource of work; ensure compliance with SanPiN standards and ergonomic requirements, etc.

The above technical results are achieved due to the fact that the countertop is rigidly connected to the rod of a vertically located pneumatic cylinder, the covers of which are rigidly connected with transition elements, the lower planes of which rest on the vertical support scale, the axis of which is parallel to the axis of the pneumatic cylinder and is in the same plane with it, where the holes of the transition elements, like the holes of the plates, go beyond the dimensions of the cross-section of the vertical support, and the plates, relying on a vertical support on the opposite side from contact surfaces of the transition elements are connected through their openings and the openings of the transition elements fixing compounds. The above significant differences are the accessories of each of all the proposed devices, that is, they have the same basic design and allow you to get the same technical result for all devices. Obtaining a technical result is inextricably linked with other structural elements that are interconnected with each other and with the basic design, which each embodiment has its own, which allows you to get additional technical results.

Distinctive features of the prototype: the vertical support is made in the form of legs connected by a crossbar; each table leg is made up of three hollow metal telescopic pipes of different diameters, falling into one another with the possibility of free sliding; the lower and middle parts of the legs allow you to adjust the static table height to the user's height, and the middle and upper parts - switching between sitting and standing; the height-changing mechanism is made in the form of a gas cartridge located between the countertop and the crossbar; vacuum suction cups are located on the base of the table legs; gas cartridge lever; threaded holes are made on the lower part of the middle and lower part of the legs pipes, into which the locking screw is screwed; between the lower parts of the table legs there are additional crossbars; the height change mechanism is made in the form of two gas cartridges; gas cartridges are mounted movably, with the possibility of rotation, the lower ends of the gas cartridges being fixed on the crossbar, and the upper ends on the brackets installed under the tabletop; gas cartridges are installed at an angle; on the countertop there is an additional swivel bracket for mounting the LCD monitor; on the underside of the countertop an additional cable channel is attached. Analysis of the distinguishing features of the prototype (analogues) and the claimed device shows that they are completely different and the prototype does not contain any signs (similar) that the claimed device has, and therefore does not allow to obtain technical results of the claimed device. Therefore, the claimed device meets the condition of patentability "novelty."

The fact that the table top is rigidly connected with the rod of the pneumatic cylinder is necessary both to ensure the accuracy of the height of the table top and to ensure that its position along with the laptop located on it, for example, is unchanged (for convenient operation of the user, and also so that the laptop does not fall from the countertop and to ensure compliance with the requirements of ergonomics and SanPin). Hard connection options can be different, for example, in the countertop (made of plywood) a hole is made for the threaded part of the rod of the pneumatic cylinder. Next, a washer is put on the threaded part of the stem, then a countertop, washer and screwed with a nut with a certain effort, providing a reliable connection. The vertical arrangement of the pneumatic cylinder and the vertical support, as well as the fact that the axis of the vertical support should be parallel to the axis of the pneumatic cylinder and be on the same plane with it, is necessary first of all to ensure the accuracy of the lift height and to comply with ergonomic requirements and SanPin. The vertical support acts as a skeleton on which a pneumatic cylinder with a tabletop (with pneumatic cylinder controls) is mounted and which can be attached to some existing computer table or can be located autonomously (providing verticality and stability), also to regulate the height of the tabletop. On a vertical support, a bracket for the system unit and other products can be placed. As a vertical support, a square pipe (20 × 20 mm, 25 × 25 mm, etc.), a rectangular section (30 × 20, etc.) can be used, both steel and aluminum (the range is very large). The pneumatic cylinder solves the problem of the exact height of the tabletop, the high speed of lifting (lowering), as well as the lifting weight, reliability, simplicity of design, etc. In the process of implementing the proposed device, various pneumatic cylinders can be used, for example, the Moscow plant PNEUMOAPPARAT LLC, 125130, Moscow, ul. Klara Zetkin, house 33, which makes pneumatic cylinders with piston diameters from 32 to 320 mm of the type "PC ... ISO6431, - a very large nomenclature; with a piston stroke of up to 500 mm with a cylinder diameter of 32.40 mm and with a piston stroke of up to 1250 mm with a cylinder diameter of 50 mm; with forces on the rod pushing at least 29 kgf for a piston diameter of 32 mm and 2894 kgf for a piston diameter of 320 mm at a pressure of 4 kgf / cm ² ". The main technical characteristics of the double-acting pneumatic cylinder of the above enterprise:

Nominal pressure, MPa - 0.9;

Range of working temperatures, hail. C - - 5 ... + 70;

Speed range, mm / s - 50 ... 800;

Working resource, km - 4000;

Weight, kg no more - at a zero stroke of 0.506 + every 10 mm of stroke 0.021, - this is for a cylinder diameter of 32 mm. This company can produce pneumatic cylinders according to special customer requirements. As can be seen from the above technical characteristics, the pneumatic cylinders are the most reliable and high-speed in comparison with analogues, the prototype. The pneumatic cylinder has covers that are rigidly (the absence of a rigid connection leads to failure of both the pneumatic cylinder and the device as a whole) are connected with transition elements (which are necessary for fixing and adjusting the pneumatic cylinder in height), the lower planes of which are based on the vertical support scale. As transition elements can be used, for example, paws, which are manufactured by the same above plant. These legs are used to install the pneumatic cylinder parallel to the mounting surface, in our case it is a vertical support. The paw is a L-shaped plate with holes in the vertical part (for attachment to the caps of the pneumatic cylinder) and holes in the horizontal part for attachment to the vertical support (in our case). For example, you can use the paws L - PC 32 ISO 6431. As plates, there can be rectangular details 2 mm thick with hole diameters and center-to-center distance between them the same as holes and center-to-center distances between them for part of the feet resting on a vertical support . As a fastening connection, for example, a bolt connection may be used, including, for example, “Bolt M5 GOST7805-80” and “Nut M5 GOST 5915-80”. In order for the plates with paws to be able to assemble with bolted joints, move along the pipe (vertical support) together with the pneumatic cylinder and countertop, and “where the holes of the transition elements, like the holes of the plates, go beyond the dimensions of the cross-section of the vertical support, and the plates, relying on "a vertical support on the opposite side from the contact surface of the transition elements are connected through their holes and the holes of the transition elements with fasteners." Otherwise, the device will not work. That is, when we need to adjust the height of the countertop, we slightly loosen, for example, bolted joints (fasteners) by partially unscrewing the nuts so that the pneumatic cylinder rests on a square pipe (vertical support), but it could be moved, for example, down. Let's say the countertop (which was lying on the user's desktop) rises 300 mm (due to the stroke of the pneumatic cylinder), and we need it to rise only 236 mm. On the pipe (vertical support) under the paws (transition elements), a scale is glued. And the edge of the upper paw is aligned with the zero mark. In this case, we lower the pneumatic cylinder so that the upper edge of the paw coincides with the mark of 64 mm on the scale and at that moment we tighten the nuts, providing reliable fastening of the pneumatic cylinder on the pipe. If the device is used as stand-alone, then the end face of the pipe will be the base surface (simulating the standard table height).

The basic design that is the same for all the proposed technical solutions makes it possible to achieve the same technical result, namely: a simpler and more reliable design, to make more precise adjustment of the tabletop lift height depending on any anthropometric data of a person, and to spend a lot of time on this to have a simpler mechanism for moving the tabletop .

Each of the three device variants contains a basic design and its structural elements, which are interconnected with the basic design, ensuring the operability of the entire structure.

Option 1: “... basic design”, and the pneumatic cylinder is connected by a flexible universal pneumatic line to a switch connected via a flexible pneumatic line to a pressure source. Option 1 allows you to additionally have a simple, stand-alone design, having a low weight and high lifting speed of the countertop (which is absent in the prototype and analogues) and control one switch. Pneumatic distributors of the same plant of Pnevmoapparat LLC (for example, manual pneumatic distributor 3Р-4-263-3УХЛ4 ТУ 2-053-02248442-027-92, their nomenclature is very large and many of this nomenclature can be used as switches) when implementing the proposed device, cranes, etc. As various pneumatic lines, for example, a 6 × 1 PVC pipe Tu2247-037-00152106-2003 and others (a large range) can be used. For example, a pressure source can be used, for example , KRAFT KT810001 pump: Rmakh-7bar, weight - 2.5 kg (see. " INTERNET ", the nomenclature is large.) Other foot, hand pumps, electric compressors, pneumatic highways, etc. can also be used as a source of pressure. The option can be used in workshops of industrial enterprises (in all services: quality control department, technical inspection, etc. ), engineering services, for example, for OGK, OGT and other services of the enterprise. It can also be effectively used for small enterprises, universities and other educational institutions. This option allows you to use the device, both in everyday life and in any enterprises, since it is autonomous and does not require electricity (saves energy).

Option 2: “basic design”, and the pneumatic cylinder is connected by a flexible universal pneumatic line with a connector connected to the exhaust switch and a pressure switch connected through a pressure pneumatic line to a pressure source. Option 2 compared to option 1 allows you to reduce the time for lowering the countertops due to the presence of an exhaust switch connected to the connector (which can be used as a tee), which is connected through the pneumatic line to the pneumatic cylinder and pressure switch (which can be used, for example, air distributor specified above).

The exhaust switch (as it can be used, for example, a pneumatic modular device of the type P-MK08, a pneumatic distributor mentioned above, etc.) allows you to quickly exit the air in the pneumatic cylinder. The applicability of this option is similar to the applicability of the previous option.

Option 3: “basic design”, and the inlet and outlet of the pneumatic cylinder is connected by a flexible inlet and outlet pneumatic lines to a flow switch connected to a pressure switch connected to a pressure source. Compared to options 1, 2, the device is the fastest, due to the use of a single flow switch (which, for example, can be used, for example, a 3-way ball valve KPR-TZ-20GPS-1,6, etc. (see INTERNET ) In addition, this option, in comparison with options 1, 2, saves energy and reduces the time for raising the lowering of the countertops. This is achieved due to the fact that once, for example, the pump has created the necessary pressure, then closed with a pressure switch (which can be used non-return valve, ball valve, etc.) pressure and then only with the help of a flow switch supply air to the inlet or the outlet of a double-acting pneumatic cylinder.The applicability is similar to the above options.

Additional technical results of the above options are obtained due to different significant differences of each option (options differ from each other in composition, controls, connections, connections, which are inextricably linked with the basic design). Analogs and prototype do not have additional technical results (which are the above options), because they do not have significant differences inherent in the options for the proposed devices.

Knowing the amount of lifting the countertops, slightly loosening the bolted connections, guided by the scale, you can accurately (quickly) raise (lower) the pneumatic cylinder by the required amount. Moreover, this is done once for one user. And nothing more needs to be regulated in the proposed device. Adjustment will be required if another user comes to work on this device, who has a different height, etc. The adjustment accuracy is very high, because it is adjustable on a scale. It remains only to apply pressure and regulate the rise (lowering) using controls (for example, pneumatic valves, etc.).

The vertical support can be attached either to the existing table itself or autonomously (while occupying a very small space at the same time). If we remove from the proposed technical solution:

- one of the structural elements (and any);

- arrangement of elements;

- The relationship between the elements.

In this case, we will not only not receive the claimed technical results, the claimed device simply will not work.

The proposed technical solutions are industrially feasible, compact, developed using modern materials, have simple designs, parts, and components of which have been manufactured by the domestic industry for many years and allow for accurate height of the table top lifting and lowering depending on any human anthropometric data, quick change-over other initial values in accordance with the requirements of ergonomics and SanPiN. Today, all the designers, technologists, programmers, economists, etc. work on computers at computer tables in various industries. And the claimed device will help to increase labor productivity and will give other positive effects. Therefore, the claimed device meets the condition of patentability "industrial applicability". There are many other professions that use computers and work in other areas.

Specific application, this technical solution can be found in all industries of the Russian Federation, near and far abroad and other industries. In addition, it can be used in all educational institutions, in everyday life for working on a computer, training, etc.

The use of significant differences in the designs proposed above not only allows us to simplify the design, but also to ensure the exact height of the table top lifting and lowering depending on any human anthropometric data, quick readjustment to other initial values and getting many other technical results that are absent from the prototype and analogues.

The set of distinctive features of the claimed device is not found in the patent and scientific literature. Therefore, the proposed device has significant differences and meets the condition of patentability "novelty."

Brief Description of the Drawings

FIG. 1 - device with a pressure source and a switch.

FIG. 2 - a device with a pressure source and an exhaust switch.

FIG. 3 - a device with a pressure source and a flow switch.

FIG. 4 - a fragment of the mechanism for changing the height.

The implementation of the invention

Adjustable device for working while sitting or standing FIG. 1 contains a worktop 1, a height-changing mechanism 2 (including a pneumatic cylinder 16 (with covers 15 and a stem 14), transition elements 18, a vertical support 17 with a scale 23, plates 20, fasteners 19 (with a nut 21), - FIG. 4, as well as a flexible universal pneumatic line 3, switch 4, flexible pneumatic line 5, pressure source 6. When the device is operating, Fig. 1 (option 1) in the “sitting” position, the table top 1 rests, for example, on a computer table (if it is an embedded device) or on the end of the vertical support 17 (if it is a stand-alone device). m countertop 1, is rigidly connected with the rod 14 of a vertically located pneumatic cylinder 16. The options for a rigid connection can be different, for example, a hole for the threaded part of the rod 14 of the pneumatic cylinder 16 is made in the tabletop 1 (made of plywood). the washer, then the countertop 1, the washer and is screwed with a nut with a certain force, providing a reliable connection. The caps 15 of the pneumatic cylinder 16 are rigidly connected with the transition elements 18, the lower planes of which are based on the scale 23 of the vertical support 17 (for example, a steel pipe 20 × 20 mm). As the transition elements 18, for example, paws L - ПЦ 32 ISO 6431 can be used. These paws are used to install the pneumatic cylinder 16 parallel to the mounting surface, in our case it is a vertical support 17. The paw is a L-shaped plate with holes in the vertical part ( for fastening to the caps 15 of the pneumatic cylinder 16) and holes in the horizontal part for fastening to the vertical support 17. The axis of the vertical support 17 is parallel to the axis of the pneumatic cylinder 16 and is in the same plane with it. The holes of the transition elements 18, as well as the holes of the plates 20, extend beyond the cross-sectional dimensions of the vertical support 17, and the plates 20, being supported on the vertical support 17 on the opposite side from the contact surface of the transition elements 18, are connected through their holes and holes of the transition elements 18 with fasteners 19. The pneumatic cylinder 16 is connected by a flexible universal pneumatic line 3 with a switch 4 connected via a flexible pneumatic line 5 to a pressure source 6. Suppose that the rod 14 of the pneumatic cylinder 16 is lowered down, the tabletop 1 is supported tsya on tabletop computer table, with the edge of the adapter element 18 (paws) is aligned with the zero on the scale 23, and the air cylinder 16 is rigidly secured to a vertical support 17 which is rigidly attached to a computer table. Suppose a scale 23 is glued to a vertical support 17, and the pneumatic cylinder has a stroke of 300 mm. And we need the countertop 1 to rise only 236 mm. To do this, we slightly loosen, for example, the bolt connections (fasteners 19) by partially unscrewing the nuts 21 (there are four of them) so that the pneumatic cylinder 16 rests, for example, on a square pipe (vertical support 17), but it could be moved, for example, way down. Then we hold the pneumatic cylinder 16 from the bottom with one hand, and press the pneumatic cylinder 16 from the top with the other hand so that it lowers and the upper edge of the paw (transition element 18) coincides with the 64 mm mark on a scale of 23 and at this moment we tighten the nuts 21, ensuring reliable fastening of the pneumatic cylinder 16 on the pipe (vertical support 17). If the device is used as stand-alone, then the base surface (imitating the standard table height) will be the end of the pipe (vertical support 17). The design of the mechanism for changing the height 2 is the same for all versions (Fig. 1-3), as well as significant differences. We believe that the device is fully assembled, that is, the pneumatic cylinder 16, for example, the PC ... ISO6431, is connected, for example, with a PVC pipe 6 × 1 Tu2247-037-00152106-2003 (flexible universal pneumatic line 3) with, for example, a manual air distributor type 3P-4 -263-3UHL4 TU 2-053-02248442-027-92 (switch 4), connected through, for example, a 246 × 1 PVC pipe Tu2247-037-00152106-2003 (flexible pneumatic line 5) to, for example, the KRAFT KT810001 pump (source pressure 6). And the above-described device for changing the height 2 is fixed and configured. After the device is tuned to the anthropometric parameters of the user, the user turns the handle of the air distributor (switch 4) so that it is open for air to enter the cavity of the pneumatic cylinder 16 and presses the pedal, for example, of the KRAFT KT810001 pump (pressure source 6). This can be 1-3 times depending on the diameter of the piston, for example, PC ... ISO6431 (pneumatic cylinder 16) and pump capacity KRAFT KT810001 (pressure source 6). The pressure created by the pump makes the piston of the pneumatic cylinder 16 move upward, which is connected to the rod 14 of the pneumatic cylinder 16 and the countertop 1 and raises the countertop 1 to the set height, that is, 236 mm. Then, by turning the handle of the air distributor (switch 4), we block the air access from the pneumatic cylinder 16 and work while standing. To work “sitting”, we again turn the handle of the air distributor (switch 4), connecting the cavity of the pneumatic cylinder 16 with the cavity of the pump (pressure source 6) and due to leaks in the pump check valve (pressure source 6), the air leaves the pneumatic cylinder 16. In reality, most foot pumps have problems with leakage of check valves (due to the fact that the landing hole for the ball is made “from under the drill”, which does not provide the necessary roughness and accuracy). If the foot valve of the foot pump is of good quality, then it is possible to assemble a pneumatic distributor with a nipple and a PVC tube without laying, the effect will be similar. The operation of the mechanism for changing the height 2 and its adjustment for all options is similar, and in the future it is not advisable to repeat. Therefore, in other versions of the devices, we consider the mechanism for changing the height 2 in conjunction with various design features (significant differences), which each version has its own.

For standing operation of the device of FIG. 2 (option 2), which includes a device for changing the height 2 with a tabletop 1, where the pneumatic cylinder 16 is connected by a flexible universal pneumatic line 3 with a connector 7 (which, for example, can be used as a tee), connected to the exhaust switch 8 and the pressure switch 9, connected through a pressure pneumatic line 10 (which can be used as a pipe 6 × 1 Tu2247-037-00152106-2003 PVC) to the pressure source 6, you must do the following. The pressure switch 9 (which can be used, for example, the pneumatic distributor specified above, etc.) opens, and the exhaust switch 8 (as it can be used, for example, a pneumatic modular device type P-MK08, pneumatic distributor, above, etc.) closes. Then we press the pedal, for example, of the KRAFT KT810001 pump (pressure source 6), which creates pressure, due to which the rod 14 with the table top 1 of the pneumatic cylinder 16 rises to the required height. To work "sitting", the device P-MK08 (exhaust switch 8) is translated by a button to a position in which air from the cavity of the pneumatic cylinder 16 freely enters the atmosphere. And then the cycle repeats.

Device FIG. 3 (option 3), which includes a device for changing the height 2 with a tabletop 1, and the input and output of the pneumatic cylinder 16 is connected by a flexible input 11 and output 12 pneumatic lines with a flow switch 13 connected to a pressure switch 9 connected to a pressure source 6 as follows . For standing operation, turn the handle of the flow switch 13, for example, a 3-way ball valve KPR-TZ-20GPS-1,6 (see INTERNET) so that it blocks the air flow into the flexible pneumatic line 12 and allows access to the pneumatic line 11, and the pressure switch 9 put in the "open" position. And we press the pedal of the pressure source 6 several times, for example, the KRAFT KT810001 pump. And air under pressure from, for example, a pump (pressure source 6) through a pressure switch 9, a flow switch 13, an input flexible pneumatic line 11 enters the lower cavity of the pneumatic cylinder 16, forcing the piston with the rod 14 and tabletop 1 to move up to the stop in the front cover of the pneumatic cylinder 16 to the required height. After the countertop 1 has risen to the required height, the pressure switch 9 is placed in the “closed” position so that the air does not leave the pneumatic system. To work "sitting", we turn the handle of the flow switch 13, for example, a 3-way ball valve KPR-TZ-20GPS-1,6, so that it provides air from the lower cavity of the pneumatic cylinder 16 through the flexible pneumatic line 11, the flow switch 13, through pneumatic line 12 into the upper cavity of the pneumatic cylinder 16. As a result, the countertop lowers. And then the cycle repeats.

Thus, thanks to the design features of a simple adjustable device for work, sitting or standing, or rather its significant differences, it is possible not only to ensure the exact height of the tabletop lifting and lowering depending on any anthropometric data of a person and quick readjustment to other initial values, but also to reduce weight , increase reliability, speed and productivity, etc.

Claims (3)

1. An adjustable device for sitting or standing, comprising a worktop equipped with a mechanism for changing its height, characterized in that the worktop is rigidly connected to the rod of a vertically located pneumatic cylinder, the covers of which are rigidly connected to transition elements, the lower planes of which are supported by a vertical support scale, axis which is parallel to the axis of the pneumatic cylinder and is in the same plane with it, where the holes of the transition elements, like the holes of the plates, go beyond the dimensions of the cross-section of the vertical support, and slime, based on the vertical support from the opposite side from the contact surface of the transition elements, connected through their openings and the openings of the transition elements fasteners and a pneumatic cylinder connected to a flexible pneumatic line with a universal switch connected through flexible pneumatic line to a pressure source. 2. An adjustable device for working while sitting or standing, comprising a worktop equipped with a mechanism for changing its height, characterized in that the worktop is rigidly connected to the rod of a vertically located pneumatic cylinder, the covers of which are rigidly connected to transition elements, the lower planes of which are supported by the vertical support scale, axis which is parallel to the axis of the pneumatic cylinder and is in the same plane with it, where the holes of the transition elements, like the holes of the plates, go beyond the dimensions of the cross-section of the vertical support, and tines, relying on a vertical support on the opposite side from the contact surface of the transition elements, are connected through their holes and holes of the transition elements with fasteners, and the pneumatic cylinder is connected by a flexible universal pneumatic line with a connector connected to the exhaust switch and a pressure switch connected via a pressure pneumatic line to the pressure source . 3. An adjustable device for working while sitting or standing, comprising a worktop equipped with a mechanism for changing its height, characterized in that the worktop is rigidly connected to the rod of a vertically located pneumatic cylinder, the covers of which are rigidly connected to transition elements, the lower planes of which are supported by the vertical support scale, axis which is parallel to the axis of the pneumatic cylinder and is in the same plane with it, where the holes of the transition elements, like the holes of the plates, go beyond the dimensions of the cross-section of the vertical support, and tines, relying on a vertical support on the opposite side from the contact surface of the transition elements, are connected through their holes and holes of the transition elements with fasteners, and the inlet and outlet of the pneumatic cylinder are connected by a flexible input and output pneumatic lines with a flow switch connected to a pressure switch connected to a pressure source .

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