SA97170679B1 - Spring-loaded locking mechanism - Google Patents

Abstract

Abstract: This invention relates to a spring-actuated output drive device used for example in medical aerosol therapy for a miniaturized high-pressure producing device for atomizing small doses of liquid medicament. The locking mechanism stressing of such a device is pressed to transfer the output drive device by applying a relatively small amount of force, and it is released with one hand. It operates reliably over a long period of time. A locking mechanism stressing comprises a force step-up transmission means, such as a screw thrust transmission means for depressing the spring, and a locking member arranged annularly arranged with engaging locking surfaces, and reclining abutments to set the travel of the spring, and the release button. The mechanism is small in size, economical in production, easy in assembly, and contains components with low wear rates. It can be reliably and easily handled by unskilled persons even when using high spring forces. Thus the metered medicament to be atomised can be measured with a very high degree of accuracy.

Description

¥ Locking mechanism for a spring-actuated device Full description BACKGROUND OF THE INVENTION 2 This invention relates to a locking mechanism (can be attached to a 48-pound latchable loading of a spring-actuated Jay transmission device The output device relates specifically, but not exclusively, to a device that produces high pressure in a fluid, for example, by means of a Jala piston cylinder. One of the objectives of the invention is to provide a locking stressing mechanism ° The invention met the requirements of a miniaturized high-pressure producing device. The invention was developed specifically, but not exclusively, for use in those Jie metered dose inhalers MDI's disclosed in a patent. US Invention ©£AVALE (derived from International Patent Application D AY [Yee) generates pressure (generally less than 0 9 bar) in a metered amount glx of a discharged fluid via a nozzle assembly containing one or more very small openings, for example; In the range from YO to SUV 500376 micrometers squared and a SH for Nozzle 98 fittings are preferred in US Patent No. 04977147 (Cag) Parallel in Patent Application 1 International No. 15/0756507). It is preferable to load energy storage means, such as a spring. manually ie Jl by means of a sil rotary sawtooth wedge arrangement as discovered in AY Patent v No. 7791178 and dally pl US Patent No. 4770087 and patent application loaded to keep the spring In the loading mode La sac latching is provided with a ratchet clamping mechanism

Ha The measured amount of fluid; pressurise It can be released manually to adjust the pressure of the position reservoir The tank can be equipped with a .cylinder arrangement using a piston and a cylindrical arrangement of the cylinder. More detail is described in recharging valve and valve arrangement © .57//175787 International Patent Application No. 77. By W. Krause ela and in the known compression latching mechanisms (see Ma

Verlag Karl Hanser Verlag cKonstruktionselemente der Feinme chaink In Krause's book Energy previously stored at (a) 077-©571; «A»©0. Ve supported or guided mechanical energy storage means are generally represented by a spring associated with its mechanical energy locking component. The quick-motion portion, which is called the rapid motion portion, prevents and releases the rapid motion portion of the movement. In a predetermined method. member Medical aerosol therapy is used to treat liquid medicaments spraying or atomization resulting from aerosols Vo and to treat cases of humans at Human respiratory tracts 55 Diseases of the respiratory tract For this purpose, it is required to generate high pressure in relation to the fluid, asthmatic conditions, asthma, and generates small-sized aerosols necessary for the aerosol droplets to be able to produce droplets inside a cylinder. Movable movable High-pressure piston in general by means of a piston. It is desirable or necessary when using an XL mechanical cylindrical atomizer of this type to generate a miniaturised hand-operated cylindrical atomiser inside the same atomizer. A relatively piston to move the piston. 508 force International Patent Application No. 780458/97 discloses a mechanical system for use in a mechanical self-actuated system.

¢ Spring loaded self-actuated mechanical system which, during the actuation stroke, includes a spring loading step and an automatic snap release for the stored energy All “stored energy” The dispensing pump operates automatically and in a manner Independent of any additional 0 user action. US Patent #7745© discloses an inhaler device for introducing a measured amount of powdered solids into a stream of air breathed by the user of the inhaler. A drive mechanism is used to calibrate the amount of powdered A yall solids to be inhaled. The dose of solid powder is inhaled when the user inhales the cair stream, which is discharged through air channels 0 0 inside the inhaler. Accordingly, the object of the invention is to develop a compression closing mechanism that is simple and reliable for operation even with high spring forces. General description of the invention and according to one aspect of the invention; A spring-loaded JRE power transmission device is provided with a spring-loaded compression locking mechanism; The mechanism comprises: Cues (1) upper cylindrical housing portion for a (Y) spring housing and a spring (4) acting on an output drive member (©) which leads to an action A member that reduces the kinetic power as a rapid movement member, and an émotion member, and the said kinetic power transmission member is arranged so that a piston in the pressure cylinder 5 moves the fluid there; a transmission drive for spring pressure (8) a locking member () » abutment (9) to specify the delimiting movement of the travel member (©) at its upper rest position (A) L Sieg to specify the movement of the travel member (*) at rest its lower and means of releasing the locking member (1); the mechanism is marked: AY

> A force step-up transmission that can be actuated for spring compression (£) is provided between the spring compression drive and spring; - the said upper cylindrical housing portion (1) and the spring compression The aforementioned spring (1) is held together by means of snap-engagement projections ° (¥) and they are rotatable with respect to each other, through which a member that reduces kinetic energy (0) pushes the spring housing (1) in the direction of the force of the spring of the spring (£)« - said locking member (1) applies along with the support (A) when the power transmission member (0) reaches its lower rest position is the power transmission member:0: power transmission (©) In the lower rest and spring position (£) in the ¢stressed position > said locking member (1) is displaceable in a surface substantially perpendicular to the longitudinal axis of the stressed locking mechanism to release the stressed state for the spring; ' - and that the aforementioned means of releasing the latching member (1) is represented by a release button ( ) associated with or attached to the latching member (1) and can be operated in the lower resting position of the kinetic power transmission member (0) by pressing and by means of which the Moving the closing member (1) from the path of a member, the motor power decreases, thus releasing the power transmission member from its lower rest position so that the spring (£) Ys pushes the power transmission member (0) to its upper rest position with it. It is preferable that the spring be a coil spring, two plates, or a 8 diaphragm spring that works as a tension or compression spring, preferably Lh hand. force step-up transmission Yo means eg screw thrust transmission

By an external torque that can be used manually 0 and in the case of using the Jail method with screw drive The upper housing portion and the output drive member comprise a wedge drive Single flight or multi-flight such transmissions are arranged between spring and spring compression transmission.

radially and the closing part can be a diagonally elastically deformable ring with cam bumps rigid ring inside itself or in the form of an elastically deformable ring or on a cade or in the form of a rigid spring with leaf springs e? 1: “cam projections” are formed by prestrossing a rigid spring shape that can be subjected to the action of a compressive spring in advance and the ring can be closed and opened; It may also include a group of 0 one or more metal springs

0 parts, preferably two. The closing part includes a plastic or metal sala; Arranged in a displaceable manner in a plane perpendicular to the cylinder axis or the SLB of deformation in said plane.

After depressing the spring, the closing surfaces of the locking member move into the path member, the kinetic force is reduced; It prevents the spring from being released.

Jails Vo locking member by means of a release button that couples or connects with the locking member. For the purpose of releasing the pressure closing mechanism, a release button of this type and the closing member are placed parallel to the Adal plane) and in a more specific and better way; in the direction of the axis of the cylinder; Or the closing member Tok is deformed in the plane of the ring.

The movement of the power transmission member is precisely determined by the use of specific supports.

| It is preferable that the drive member be a flange over an additional output member.

It is preferable that the closing member forms an optionally interrupted closed ring

Le may be in the form of an open ring or yoke, and it is desirable to load

A member engages with reclining devices so as to reduce the risk of tilting and engagement of a transmission member

How much

No motor ability. This can be achieved, for example, by preparing to engage at two eating positions that are essentially opposite diagonally. Other preferred embodiments include: - the spring is a helical compression spring - the locking member engages along with the bolster means when the low-kinetic member reaches the closed position. - Jad is provided with the clutch using cams associated with the means of moving the power transmission member from the firing position to the closed position. - Engaging action is provided by using one or more springs. Ve - The closing member LE of the deformation is resiliently deformable to provide the engagement action. - The closure member is arranged so that the Gay moves out of the path of the power transmission member. - There is a means of reducing the incremental force to move the kinetic energy transmission in the direction of the bias bias of the spring. - The transmission includes a rotatable part with sawtooth thrust cams. - The power transmission member is arranged so that it moves a piston in a cylinder to compress the fluid there. Y. - The mechanism is part of a device for spraying the fluid; or more specifically; Part of a metered dose inhaler. BRIEF EXPLANATION OF THE DRAWINGS Preferred embodiments of the invention will now be described; For example; With reference to the accompanying fees; So that: speak

A

Via vertical longitudinal section mechanism Figure 1a: Represents a view of a longitudinal vertical section of the invention with an off-engagement closing member Gy a compressive closure and a spring in the firing position; 41 of the same mechanism with an interlocked closing member and the spring in Sn Views of Gry: B1. Figure: its compressed position; ° corresponds to Figures 1a and B horizontal. Figures A and B: represent two views of two horizontal sections showing the locking member in the disengaged and engaged positions, respectively; of the Tall member. and “b:_represent two views similar to forms “a and b” and show the embodiment fr of the forms the closure; and *b:_represent two views similar to forms a and b and show a fourth embodiment of the lo member the closure forms; Detailed description Longitudinal section through the pressure closing mechanism The housing part Ja fy shaped engages on the spring housing ?, where it is connected with it by means of cylindrical engagement protrusions 1 upper cylindrical located on the outer side of the spring housing 7 and extending ‎ 1 snap-engagement projections placed on opposite sides; Each circular segments extend over two circular segments of 0 degrees peripherally extending groove. The protrusions are interlocked inside a groove that extends circumferentially 01 about, so the housing part rotates relative to the upper housing portion, the inner side of the upper housing part, generally Mig inside the spring housing? Compression spring supports; on a protrusion extending circumferentially las in advance when the two parts of the spring housing are installed; And on a member of reduced kinetic capacity © that follows Cua at the lower 8 end of vo km

in a displaceable form in a parallel relationship between the upper housing and the spring housing; Which, in turn, presses on the upper part of the housing 1. And a member of the lower kinetic capacity of the cup shape is installed in a sliding way inside the cylindrical bore of the housing? However the closing member extends towards the upper housing part. The annular locking member extends around the 0 motor power transmission member. The release button 7 on the closing part of the Gala extends outside the upper housing. In a preferred arrangement the © member is a flange placed on a reciprocable hollow piston (not shown) in a cylinder (not shown) in the upper housing part connected by atomizing means and the lower end of the piston

with a reserve tank (not shown); The mechanism as a whole is part of MDI

La sec ve in Alla use screw-driven power transmission; The collar of the cup-shaped power transmission member includes two articular cavities towards which two serrations slide in the upper housing. The beds and the two cavities 5 are shown in a very simple way in Figure 1a. When the upper housing part is rotated relative to the spring housing, a member of reduced kinetic energy pushes more into the spring housing against the force of the compression spring. And as soon as the upper edge pushes the edge

ve cantilever the power transmission member down a sufficient distance through the closing member; The annular locking member is displaced perpendicular to the axis of the housing between the upper edge of the power transmission member and an annular protrusion in the upper housing portion; The motor power decreases member and the compression spring that is compressed (additionally) holds the displacement of the motor power decreases rapidly in the achieved position.

0 and the average spring force ranges from 01 to 1560 Newtons. The spring force varies by an amount of about 702 + average spring force between the upper rest and lower rest positions of a member of reduced kinetic capacity.

Pressing the release button (7) ada causes the annular closure part to move back perpendicular to the axis of the housing, whereby the movement of the motor power transmission member is opened. A compression spring pushes the velocity member upward by a predetermined distance and thus deforms a component (not shown) that is attached to the velocity member; For example, a piston inside a cylinder. Figure 1a shows the closing pressure mechanism and a member whose kinetic power decreases in its static upper position, with the closing part being outside the engagement. Figure 1b shows the compression locking mechanism and member in which the kinetic power decreases in its lower resting position as the locking member engages. And 1 is the means of determining the movement of an organ whose kinetic capacity decreases in its static lower position, while + ld rotation is the means of determining its movement in its static upper position. The rotation of the 4′ with respect to each other of the two housing parts causes the mechanism to transition from the state shown in Figure 1a to the state shown in Figure 1b. Pressing the firing button causes the mechanism to transition from the state shown in Figure 1A to the state shown in Figure 1B 0

Figures IY and B show a cross-section through the compression closing mechanism at a level in the center of the annular closing portion; more precisely, Figure ?a corresponds to the case of the compression closing mechanism as shown in Figure 1a with the locking member positioned out of engagement; (b) The condition of the compressive closing mechanism as shown in Figure 1b with the locking member engaged. Figures ?a to 1b show the fae of embodiments according to the present invention of the annulus closure member; More precisely, Um is in cross-section at a level approximately in the center of the annular closure member; And in part it is a view of a horizontal plan with a cut-down of the upper housing part. Figures gle die dy 1 show the locking member in the disengaged (out of engaged) position; while

Figures B; cat B 5 show a member (DEY) in the engaged position. Figures A Ye ? and B show a bevelled cam projection 11 bevelled on the outer circumferential surface of the locking member 01. A chamfered cam cam 0” is placed on the upper edge of the spring housing LY and near the end of the rotational movement of the upper housing portion relative to the spring housing the two cams press against each other while their chamfered sides push the cam on the spring housing closing member 01 to the interlock position. And at AYR

AR

The locking member again to the disengagement position and the room opens for movement ig Operation of the release button A member of reduced kinetic capacity. They push 11 integrated by two integrated springs 11 The closing part fe and in the figure provides the closing member to the position The upper stator of the latching mechanism against the outer circumferential surface of the power transmission member ©. And as soon as the upper edge of the kinetic power transfer member 0 © is pushed through the closing member, the closing member is displaced by the force of the two integral springs to a second (Dey) the addy member of the operation of the release button dey of an interlock position shown in the figure to a position Disengagement reverses the force of the two integrated springs, and the field of motion opens up for a member whose kinetic capacity decreases. outer circumferential member 1 and as soon as the upper edge of the power transmission member is pushed through the closing member the arch segments jump over the upper edge of the power transmission member into the pre-compressed VT position arch segments 60; Thanks to its bending load, it gad a clutch. When the release button is turned outwards and gives way to dislodge a member the kinetic capacity is reduced. bending loading 0 With integrated springs. Each 117 is fixed, and Figure 11 shows a closing part consisting of two parts on the inner side of the Yo. A VA protrusion is placed in a rotatable manner on the axis. VA is a spring part for each spring part. As soon as the top edge of the power transmission member is pushed through a member it jumps over the top edge of the power transmission member into an engaged position. 010 Closing the bumps and Vo opens outward with the bumps 0 and when the release button is actuated the springs push | 0 The scope for displacement of an organ decreases the kinetic capacity. The push-lock mechanism as described with reference to the drawings has the following advantages: For operation even by unskilled persons. reliable Simple and reliable - it can be released with one hand by pressing a button Launch - 1 m

VY

- when using means of reducing the incremental force; Da screw drive force transmission; A large spring force can be generated by a small level of torque. The movement of the closing member can be coupled positively with a rotary movement to compress the spring in a simple manner. ° - It can be produced economically and is easy to assemble. - It contains functional elements with a low wear level and is reliable to use. - It is compact in size and can be easily matched with a miniaturized high pressure atomiser, and the measurement accuracy is high (Tan) due to the specific AIC Al ve of the member with less kinetic capacity. AY

Claims (1)

VY longitudinal axis locking stressing mechanism 1-1 In the lead vertical direction, spring-actuated transmission of kinetic energy output drive device 1 The mechanism includes: ¢ upper cylindrical housing portion and spring housing motor output drive 3 0 8 J 8) works on spring member and spring housing ° member which causes the output drive member to act as a member For fast movement, member 10101-0, and the output drive member has a lower motor capacity Fluid compressed in a cylinder to compress the aforementioned piston so that it moves the piston of member A 9 there; transmission drive to compress the spring ¢ locking member; abutment Ve lever to determine delimiting the travel of the output drive member 1 4) its upper rest position and an abutment lever to determine VY movement of the travel member Kinetic power output drive member in its rest vy 08m lower position; Means for releasing the locking member; The motorized Vi is characterized by: Ve — Operate force step-up transmission 4 to compress spring is provided between transmission #6 to compress spring and spring ¢éspring VY : VA - Part of cylinder housing connects Said upper cylindrical housing portion 1 and said spring housing are held together by means of snap-engagement projections Yee and are rotatable with respect to 71 to each other by means of which a transmission member is driven Output drive member YY to spring housing force of the spring YY ¢ | AYR \¢ The aforementioned Loic abutment along the locking member applies the locking member - Yt rest to the rest position output drive member reaches its Yo output drive member and keeps the lower Jal position Ya and the spring 8 in rest position member ¢stressed position YA Ya - The aforementioned locking member is displaceable in 7 surface of the plane essentially perpendicular to the longitudinal axis of the locking stressing mechanism 71 of the stressed state of the spring ¢spring or = and that the aforementioned means of releasing the locking member is represented by a release button associated with or connected to the locking member and yo can operate it in the lower rest position of the power transmission member Kinetic output drive member 7 by pressure, by which the locking member Ge locking member vv is moved along the path of the output drive member YA, thus releasing the releasing of the output drive member va from its lower rest position so that the spring pushes its 8 member, the kinetic energy of the drive member decreases, and it is brought to its upper rest 1 08m rest position. 1 "- the mechanism 5 8 of the protection element 11, where the aforementioned spring includes a coil spring Y or a plate spring that acts as a tension spring v Or a compression spring 1 *- Mechanism 07D according to Claim 1 or Cus oF force step-up transmission means Y includes screw thrust transmissions AYA Vo Transmission v Increases between the transmission drive to pressure the spring 8 and the spring ¢ output of mechanism 06007 according to claim 1 » where the motor power transmission member is -1 screw and includes a cup-shaped drive member Y collar in a sawtooth-shaped recesses two arterial cavities thrust transmission ¥ slide cup-shaped output driver ¢ upper housing portion Casall ¢ . 1 ©- The mechanism according to any of the protection elements from 1 to of, where the Y locking member includes an open or closed ring 0 which is 0 sequentially For displacement Displacebly in the surface of the plane perpendicular to the longitudinal 40 ¢ axis Locking stressing mechanism. ° 1-1 Mechanism According to any of the protection elements from 1 to 0< where the locking member 1 includes: a radially elastically deformable v ring or a rigid ring a rigid ring containing leaf springs formed on it ¢ or a rigid ring containing cam projections ¢ or a rigid ring ° and a metal spring .metal spring 7- The mechanism according to any of the elements of protection from 1 to 6, where the locking member Y consists of plastics or metal. AY" coupled where it is coupled 1 to 1 according to any of the protections of the mechanism The mechanism — A #dsana1. Positively with movement movement member movement Y upper movement ga! relative rotary movement v .spring housing cylindrical housing portion ¢ mechanism The fluid comprises an atomizing and compressing device 1 output Ja according to any of the previous claims where a compress member 1 compresses to compress the cylinder of a Jala piston so that it moves the piston of drive member 1 supplied there. On a calibrated atomizer ¢ q of protection a, device “-1 0 \ . metered dose atomiser Y of ic all according to claim 4 that includes a metered dose atomizer device 1-11. miniaturized light-pressure metered dose atomizer 1