A DISPENSER AND A CONTROL METHOD OF THE DISPENSER

Abstract

A dispenser for compound-containing containers includes a receiving chamber for a container; at least one push rod displaceable relative to the receiving chamber; a motor for moving the at least one push rod; a control unit for controlling the motor; a main switch for activating the motor; and an operation selection switch for switching between different operation modes and having a discard position. The control twit is configured to dispense a predetermined discard amount of the compound when the operation selection switch is set to the discard position and the main switch is triggered. The dispenser provides an automated discard function, which helps the user to discard the correct amount of compound before starting normal applications. With the dispenser, a procedure of initializing a compound-containing container is improved, to increase the security of the application.

Claims

1. A method for controlling a dispenser for a compound-containing container, the method comprising: selecting a discard position via an operation selection switch; identifying information on the compound-containing container; with a control unit of the dispenser, selecting a predetermined discard amount of a compound based on the information; triggering a main switch by a user to activate a motor to move at least one push rod; and dispensing the predetermined discard amount of the compound.

2. The method according to claim 1, wherein the predetermined discard amount is a value indicating a defined movement of the at least one push rod.

3. The method according to claim 2, wherein at least one sensor detects the movement of the at least one push rod, said at least one sensor being electronically connected to the control unit.

4. The method according to claim 1, wherein the predetermined discard amount for a different compound in the a different compound-containing container is stored in a memory module of the control unit.

5. The method according to claim 4, wherein the dispenser comprises a receiver configured to read the information on the compound-containing container, said receiver being electronically connected to the control unit, and a data process module of the control unit configured to select the predetermined discard amount of the compound stored in the memory module based on the information read by the receiver.

6. The method according to claim 5, wherein the information on the compound-containing container includes the information showing types of the compound and; or sizes of the compound-containing containers.

7. The method according to claim 1, wherein the predetermined discard amounts for different compounds in the different compound-containing containers are stored on the compound-containing containers.

8. The method according to claim 7, wherein the dispenser comprises a receiver configured to read the information on the compound-containing container, said receiver being electronically connected to the control unit, wherein the control unit selects the predetermined discard amount of the compound stored on the information read by the receiver.

9. The method according to claim 1, wherein the control unit terminates the movement of the at least one push rod once the predetermined discard amount of the compound has been dispensed.

10. The method according to claim 9, wherein the dispenser comprises an indicator unit configured to electrically connect to the control unit and generate a user-perceivable signal to reflect a discard status.

11. The method according to claim 1, wherein the compound contained in the compound-containing container includes two components, wherein a mixer is attached to a receiving chamber of the dispenser, and the method further comprising: filling up the mixer before selecting the discard position.

12. A dispenser for a compound-containing container, comprising: a receiving chamber for the compound-containing container; at least one push rod displaceable relative to the receiving chamber; a motor for moving the at least one push rod; a control unit for controlling the motor; a main switch for activating the motor; and an operation selection switch for switching between different operation modes; wherein the operation selection switch comprises a discard position, and the control unit is configured to dispense a predetermined discard amount of the compound when the operation selection switch is set to the discard position and the main switch is triggered.

13. The dispenser according to claim 12, wherein said predetermined discard amount of the compound is a value indicating a defined movement of the at least one push rod.

14. The dispenser according to claim 13, comprising at least one sensor configured to detect the movement of the at least one push rod, said at least one sensor being electronically connected to the control unit.

15. The dispenser according to claim 12, wherein the control unit comprises a memory module configured to store the predetermined discard amount for different compounds in different compound-containing containers.

16. The dispenser according to claim 15, further comprising: a receiver configured to read the information of the type/size of the compound and/or the compound-containing container; said receiver being electronically connected to the control unit, and a data process module of the control unit configured to select the corresponding predetermined discard amount of the compound stored in the memory module based on the information read by the receiver.

17. The dispenser according to claim 12, comprising an indicator unit electrically connected to the control unit and generating a user-perceivable signal to reflect the discard status.

18. The dispenser according to claim 12, wherein the compound contained in the compound-containing container includes two components; and wherein a mixer for mixing the two components is attached to the receiving chamber.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is explained in greater detail below with reference to an exemplary embodiment. In the drawing,

[0025] FIG. 1 is a top, front perspective view of an embodiment of a dispenser;

[0026] FIG. 2 is a schematic diagram of the dispenser of FIG. 1 including a control unit;

[0027] FIG. 3 illustrate the flow chart of the operating method of the dispenser of FIG. 1.

DETAILED DESCRIPTION

[0028] Dispenser 11 for compound-containing containers 6, as shown in FIG. 1, has a receiving chamber 12 for container 6, a push rod 13 which is displaceable relative to receiving chamber 12, and an electrically operable dispensing mechanism 16. A pressure piston 14 for applying pressure to container 6 and/or to the compound contained therein is provided on the end of push rod 13 facing receiving chamber 12. Operation of dispensing mechanism 16 causes push rod 13 to move into receiving chamber 12, thereby pressurizing the compound contained in container 6, causing it to be extruded through outlet of container 6. The compound contained in container 6 includes one or several components. According to a preferred embodiment of the invention, the compound contained in container 6 includes two compounds, thereby two push rods being displaceable relative to the receiving chamber 12. A mixer 7 is advantageously provided at outlet of container 6, said mixer ensuring complete mixing of the components prior to being discharged through the outlet.

[0029] Dispensing mechanism 16 is accommodated in a housing 17 having a handle 18 extending therefrom. A power supply 19 in the form of a battery pack is detachably connected to the free end of handle 18. Dispensing mechanism 16 includes a motor 21 which, via a transmission mechanism, drives a drive wheel (not shown) meshing with teeth on push rod 13, thereby moving the push rod 13.

[0030] Handle 18 is further provided with a main switch 26 in the form of a push button for activating the motor 21. Also provided is a control unit 31 for controlling motor 21, said control unit having a power module for connecting the motor 21 to power supply 19.

[0031] As shown schematically in FIG. 2, the main switch 26 is electrically connected to control unit 31. Furthermore, an operation selection switch 41 is provided for switching between different operation modes and adjusting the amount of compound to be dispensed with each full stroke. This operation selection switch is electrically connected to control unit 31. Operation selection switch 41 includes a potentiometer and provides a plurality of possible settings for the dispensing of correspondingly defined amounts of the compound to be extruded, including a zero position, in which actuation of main switch 26 does not cause motor 21 to be connected to power supply 19, and a continuous position, in which motor 21 is connected to power supply 19 for as long as main switch 26 is actuated. Moreover, the operation selection switch 41 further includes a discard position, in which the dispenser performed an automatic discard.

[0032] According to a preferred embodiment of the invention, the dispenser comprises at least one sensor. A first sensor 42 for detecting the movement of the at least one push rod. More preferably, the dispense includes a second sensor 43, for detecting the current consumption to show the initiation of the discard. The first and second sensors 42, 43 are both electronically connected to the control unit 31.

[0033] The control unit 31 comprises a memory module 33 configured to store the necessary discard amounts of compounds for different containers/compounds. Since the compound-containing containers have different types and sizes, for example, some compounds are available in 330 ml, 500 ml and 580 ml, the necessary amount of discard differs between different pack/cartridge sizes. The specified discarding amounts of different types of the compounds packaged in different pack/cartridges sizes/types are the predetermined discard amounts which are stored in the memory module 33 of the control unit in advance. Alternatively, the information of the predetermined discarding amounts could also be stored on the containers. For example, the information could be available on a DMC or NFC or similar on the containers.

[0034] The dispenser 11 further comprises a receiver 34 configured to read the information on the container 6; the receiver 34 being electronically connected to the control unit 31. The receiver 34, for example, may be a device which can scan a radio frequency tag or a data matrix code. Since the dispenser can only recognize the size of the foil pack/cartridge by detecting the position of the push rods via sensors, the differences between different types of compounds with the same package size cannot be detected. With the receiver reading the information om the containers, for example, the types of the compounds, the dispenser could detect the compound type, e.g. with a radio frequency tag or by scanning a data matrix code, the different amounts for compounds types could be distinguished.

[0035] Moreover, the control unit 31 further comprises a data process module 32 configure to select the predetermined discard amounts stored in the memory module based on the information. When the receiver 34 reads the RF tag or data matrix code, the data process module 32 processes the information and selects the predetermined discard amount of the compound corresponding to the information on the containers 6 which are stored in the memory module in advance.

[0036] Moreover, an indicator unit 35 is provided which is electrically connected to control unit 31 and which generates a user-perceivable signal when the discard procedure has been completed. Advantageously, the user-perceivable signal is an audible signal and/or a visual signal. For example, a correct performed discard by the user will be recognized due to the automatic stop of the dispenser and a LED feedback. The LED will be light green for a positive feedback. If the discard was aborted by the user or other circumstances like an empty battery, the dispenser will signalize this the user. Best case, the LED will light up red, if the discard was not finalized properly. In this case, the user has to finish the discard or restart the procedure.

[0037] The method for controlling the dispenser 11 will now be described with reference to FIGS. 2 and 3. After insertion of a new or partially used container 6 into receiving chamber 12 of dispenser 11, to ensure correct mixing of the components, the mixer of the container, e.g. foil packs or hard cartridges, must be initialized by discarding a certain amount of compound. Firstly, for the compound in container including of two components, especially when the container is a foil pack, due to the high tolerances of the foil pack length, the needed movement of the push rods 13 to fill up the mixer is quite unstable. Caused by this, the discard amount differs for each foil pack. Therefore, a smart discard function needs a manual filling of the mixer by the user. Afterwards, the control unit could predict the discard amount based on the push rod position and dispense the necessary amount of compound by processing the movement of the push rods. Therefore, the first step 51 of the method is to fill up the mixer.

[0038] In order to dispense the correct amount of discard material, the operation selection switch 41 is advantageously set to the discard position (S2).

[0039] According to one preferred embodiment of the invention, next step S3: identifying the compound type and/or the container sizes. As the necessary amount for discarding differs between different pack/cartridge sizes. This predetermined discard amount has been determined once the container is produced. For example, for the Hilti RE 500, the necessary amount for discarding shall be 15 ml. This step could be done by the sensors detecting the position of the push rod, but the sensors can only recognize the size of the container, the differences between different types of mortar with the same package size cannot be detected. Preferably, the dispenser further comprises a receiver 34, which is electronically connected to the control unit. The receiver 34 can identify the information on the container. The information may be the type of the compound in the container and/or the types/sizes of the containers, e.g. foil pack or cartridge. With the receiver, for example, a radio frequency tag or by scanning a data matrix code, the different amounts for mortar types could be distinguished.

[0040] Then, S4: the control unit determines a predetermined discard amount of the compound. As the amount of compound to fill the mixer and the predetermined discard amount the discard are stored in the memory module 33 of the control unit 31 beforehand, the data process module 32 of control unit will select a correct predetermined discard amount based on the container's size/type or compounds to be dispensed.

[0041] Next, S5: the main switch 26 is triggered. The current consumption of the dispenser increases, which can be detected by the second sensor 43. This state could be used to determine the start of the discard procedure.

[0042] The control unit 31 actives the motor to drive the push rod forward, in the meantime, the movement of the push rod 13 is detected by the first sensor 42. (S6). Both sensors 42, 43 send the signals to the control unit 31.

[0043] Then in the next step S7: the control unit will evaluate if the dispensed amount of the compound reaches the predetermined discard amount. As the predetermined discard amount is a value indicating a defined movement of the at least one push rod, once the movement of the push rod 13 detected by the first sensor 42 is equal to the defined movement, the amount of the compound that has been dispensed is equal to the predetermined discard amount selected by the control unit. The main switch 26 is actuated until the amount of the dispensed compound meets up with the predetermined discard amount. Then it comes to step S8: the control unit 31 terminates the running of the motor 21. Typically, after finalization of the discard, the rods will drive backwards by preferably 3 mm to release the pressure in the containers and to avoid a dripping of the compound out of the mixer. Finally, a correct discard is completed automatically.

[0044] Preferably, a correct performed discard by the user will also be recognized by an indicator unit 35. The indicator unit 35 generate a user-perceivable signal to let the user be aware of the status of the discard procedure. In a preferred embodiment, the indicator unit 35 could be a LED feedback. For example, the LED will be light green for a positive feedback. If the discard was aborted by the user or other circumstances like an empty battery, the indicator unit 35 will signalize this to the customer. Best case, the LED will light up red, if the discard was not finalized properly. In this case, the user has to finish the discard or restart the procedure.

[0045] Using the dispenser according to the present invention an operator is able in a convenient manner to perform a correct discard, thereby increasing the security of the application. While only selected embodiments have been chosen to illustrate the present invention, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made herein without departing from the scope of the invention as defined in the appended claims. Thus, the foregoing descriptions of the embodiments according to the present invention are provided for illustration only, and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.