Abstract:
A stimulation device is provided in accordance with one embodiment. The stimulation device includes a chamber which has a flexible wall portion. A drive unit of the stimulation device is in physical communication with the flexible wall portion so as to cause deflections of the flexible wall portion in opposing directions, thereby resulting in a changing volume of the chamber. The changing volume of the chamber results in modulated positive and negative pressures with respect to a reference pressure. An opening of the stimulation device is for applying the modulated positive and negative pressures to a body part. The stimulation device includes a control device for controlling the drive unit.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application is a continuation of U.S. patent application Ser. No. 15/023,471, filed Mar. 21, 2016, which is a national stage (under 35 U.S.C. 371) of International Patent Application No. PCT/EP2014/065734, filed Jul. 22, 2014, which claims priority to German Patent Application No. 102013110501.7, filed Sep. 23, 2013, the disclosures of which are herein incorporated by reference in their entirety. 
     
    
     TECHNICAL FIELD 
       [0002]    Embodiments of the present invention relate to a stimulation device for erogenous zones, in particular for the clitoris, a system with a stimulation device, and methods for stimulating body parts. 
       BACKGROUND 
       [0003]    The erogenous zones of the human body can be stimulated with a variety of tools. For example, vibrators are used to apply a stimulus to a particular area of the skin by direct contact. However, this form of stimulation can lead to irritations or inflammations of the skin. Also, direct contact of the genital area with such tools for individual reasons of hygiene or due to personal reservations, for example, may not be desired. 
         [0004]    In particular, the direct stimulation of the clitoris with a clitoral massage vibrator, for example, is fraught with problems, as the clitoris is usually a woman&#39;s most sensitive erogenous zone. The entire clitoris is equipped with numerous nerve endings, thus making it particularly touch-sensitive and responsive to sexual stimuli. Here, the clitoris glans, in which the nerve cords of the two thighs meet, should be particularly emphasized. Frequent use of a clitoral massage vibrator for direct stimulation, for example, leads to habituation effects or conditioning of the stimulated erogenous zone and the initial use of such a device may require certain practice or familiarization. 
         [0005]    Furthermore, medical studies conducted in 2006 determined the female clitoris as definitive starting point of the female climax and neurologically proved the different qualities of sensation of clitoral (and vaginal) orgasm for the first time. Thus, according to the most recent medical research, the stimulation of the clitoris, rather than the vagina, is considered the starting point of a woman&#39;s sexual arousal and thereby the key to female “sexual pleasure”. 
         [0006]    The sensitivity of the human erogenous zones, such as the clitoris, the inner and outer labia or the nipples, continues to differ greatly individually. The person may be so sensitive that direct stimulation is only possible after prolonged foreplay, and even then only very subtly or ruled out completely. Furthermore, the sensitivity of the corresponding zone can change dramatically from one situation to another or even during a sexual act. 
         [0007]    For the aforementioned reasons, various indirect forms of stimulation are common practice as alternatives to direct stimulation. 
         [0008]    For indirect stimulation of erogenous zones, and especially the clitoris, conventional vacuum devices are used to arouse the erogenous zones of the person concerned without directly contacting the main area to be stimulated. Thus, for example, vacuum pumps for the primary or secondary female sexual organs are known, which usually have a suction cup for placing on the appropriate area and a hand pump. The negative-pressure exerted by this type of device on the clitoris, for example, generates a negative pressure in the clitoris itself, which is usually lower than the systolic blood pressure. This difference in pressure leads to an enlargement of the clitoris and/or stimulates the blood flow in the affected area. This vascular clitoral engorgement serves both to promote desire by increasing sensitivity and for optical and tactile manipulation. The improved blood circulation also leads to an increased leakage of vaginal moisture which makes the stimulation more pleasurable. However, the manual operation of the hand pump is often annoying or distracting. In addition, the long-term or uninterrupted use of negative-pressure in this device category may lead to habituation effects, which limit the effectiveness of the device in the long run. Moreover, a pure increase in the clitoral blood flow is often insufficient to reach a climax; vacuum pumps are thus often used only as foreplay to achieve the climax with a subsequent direct (pressure) massage of the erogenous zone. 
         [0009]    Electrically driven vacuum pumps are also used increasingly instead of manually operated vacuum pumps as well. As an example of this, WO 2006/05 82 91 A2 discloses a device for sexual therapy, wherein the arrangement consists of a tubular suction chamber for the clitoris, an electric vacuum source (vacuum pump) and a plurality of airflow openings. The operation of the vacuum pump generates a permanent airflow or air exchange in the chamber in the area of the clitoris. This has the disadvantageous effect of suctioning the increasingly leaking vaginal moisture caused by the negative-pressure, thus having a drying effect on the stimulated parts of skin. Likewise, the suctioned moist air leads to a contamination of the fluidic subsequent vacuum arrangement, of the vacuum pump for example. Such arrangements with vacuum pumps may thus be hygienically problematic, as vacuum pumps and the associated valves or ventilation components often have dead spaces or blind spots and/or are difficult to clean. Furthermore, the device is meant to treat the blood vessels in the clitoris and not to provide stimulation up to sexual climax. 
         [0010]    U.S. Pat. No. 6,099,463 A discloses a clitoris stimulation device with a tubular suction chamber, a vacuum source or a vacuum pump and a plurality of valves, which are used to control the size of the vacuum. The vacuum can also be in cyclic form to achieve a stimulation effect, although habituation effects are also to be expected with this device due to the use of a permanent vacuum. As explained above, the disadvantages relating to hygiene and the dehydration of the skin part to be stimulated are also present here. Likewise, the pressure-related arrangement with a plurality of valves, vacuum pump, etc. is relatively complex. 
         [0011]    U.S. Pat. No. 6,464,653 B1 discloses therapeutic devices and methods to generate a clitoral engorgement with the aid of a vacuum generated by a vacuum pump to assist in the treatment of clitoral disorders, such as incontinence. A control valve or modulator that can be correspondingly covered by a finger is used to manually adjust or vary the amount of vacuum in the suction chamber. This requires the user&#39;s attention and may be distracting or diverting under certain circumstances. This relatively complex device with additional valves also has the same disadvantages relating to hygiene and dehydration as explained above, although the device is also used for long-term therapeutic purposes and not for short-term sexual stimulation. 
         [0012]    WO 2008/028076A2 discloses a therapeutic device for women, which is mainly dedicated to treating sexual disorders. The device includes a combination of indirect stimulation by means of a vacuum chamber and direct stimulation by means of mechanical vibrators and oscillators. 
         [0013]    The negative-pressure in this therapeutic device is used to increase the blood flow in the clitoris, while the area of skin is actually stimulated or massaged by means of direct mechanical vibrations/oscillations. Thus, a suction cup for placing on the area of skin to be stimulated is internally connected with a motor via a mechanical connection. The suction cup is extended by the motor once the device is activated, thus increasing the volume of the suction cup. The resulting volume of the suction cup and thus the strength of the vacuum can be adjusted by means of control elements on the device. The air displaced in the device by the suction process is discharged outwardly again via a pipe. The vacuum in this device has only a supporting function, while the actual stimulation ensues directly, which also entails the same disadvantages of a direct stimulation as explained above. 
         [0014]    US 2013/001276 9A1 discloses a device in which a pulsating positive-pressure is used for stimulating an air pressure massage. A pump or compressor thus generates a pulsating positive-pressure, which is directed towards the erogenous zone to be stimulated by means of a nozzle. This device disadvantageously causes the affected area of skin to dry out severely or completely. Likewise, there is usually a temperature difference between the temperature of the supplied air and the temperature of the area of skin to be stimulated, which may be felt to be distracting under certain circumstances. The same problems of hygiene as explained above also occur in this device, although in this case any pathogens or germs or other contaminations located in the device are also transported directly to the user&#39;s genital area. 
         [0015]    Thus, the prior art devices all have the same disadvantage in common, in that the complexity of the arrangements generating negative-pressure or positive-pressure may be high and this device may have problems of hygiene. 
         [0016]    Furthermore, the prior art devices have another disadvantage in common, in that habituation effects occur in the event of constant or frequently recurring use of negative-pressures. 
         [0017]    Another disadvantage of some of the previously described vacuum devices is, firstly, that the negative-pressure has to be limited by means of a control valve or a vacuum pump and, secondly, that the negative-pressure is supposed to be reduced by means of a manual opening of a release valve, before the suction cup is peeled from the skin. Should one of the valves have a technical defect and/or the user operate the device incorrectly, there may be a risk of injury in certain circumstances. 
         [0018]    Thus, in view of the problems as explained above, the problem addressed by the embodiments discussed herein is to provide a stimulation device with a simple construction that is easy and safe to use. 
         [0019]    Another problem addressed by the embodiments discussed herein is to provide a stimulation device with an effective stimulation-triggering effect, which is suitable for stimulating an erogenous zone, especially the female clitoris. 
         [0020]    In addition, partial problems addressed by the embodiments discussed herein are to provide a device, which prevents the erogenous zones to be stimulated from drying out, is hygienic and prevents habituation effects. 
         [0021]    The above problems are addressed by embodiments of the stimulation device described herein. Advantageous developments and embodiments are the subject-matter of other alternative independent claims and dependent claims. 
       SUMMARY 
       [0022]    A stimulation device is provided in accordance with one embodiment. The stimulation device includes a chamber which has a flexible wall portion. In one embodiment, the flexible wall portion may include silicon and may be integral with the chamber. A drive unit of the stimulation device is in physical communication with the flexible wall portion so as to cause deflections of the flexible wall portion in opposing directions, thereby resulting in a changing volume of the chamber. The changing volume of the chamber results in modulated positive and negative pressures with respect to a reference pressure. The modulated positive and negative pressures are applied to a body part (e.g., a clitoris) through an opening of the stimulation device. For example, the opening of the stimulation device may be placed over the body part to apply the modulated positive and negative pressures. The drive unit is controlled by a control device of the stimulation device. 
         [0023]    In one embodiment, the stimulation device includes a second chamber. The changing volume of the chamber results in the modulated positive and negative pressures in the second chamber. 
         [0024]    In one embodiment, the stimulation device may be a portable hand-held device with a battery. The stimulation device may also have an operating element for adjusting the modulated positive and negative pressures and a light emitting diode for indicating a status of the stimulation device. 
         [0025]    In accordance with an embodiment, the stimulation device includes a pressure field generator which has a flexible wall portion. A drive unit of the stimulation device is in physical communication with the flexible wall portion so as to cause deflections of the flexible wall portion in opposing directions, thereby resulting in a changing volume of the pressure field generator. The changing volume of the pressure field generator results in modulated positive and negative pressures with respect to a reference pressure. The modulated positive and negative pressures are applied to a body part through an opening of the stimulation device. The drive unit is controlled by a control device of the stimulation device. 
         [0026]    In one embodiment, the pressure field generator includes a first chamber and a second chamber. As such, deflections in the flexible wall portion of the first chamber of the pressure field generator result in the modulated positive and negative pressures in the second chamber of the pressure field generator. 
         [0027]    The above-described features and functions of embodiments of the present invention as well as other aspects and features are further described in the following with the aid of a detailed description of preferred embodiments with reference to the enclosed illustrations. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0028]    The figures show in: 
           [0029]      FIG. 1  a front view of a first embodiment of the stimulation device according to the invention; 
           [0030]      FIG. 2  a perspective side view of the first embodiment of the stimulation device according to the invention; 
           [0031]      FIG. 3  a cross-section through the first embodiment of the stimulation device according to the invention; 
           [0032]      FIG. 4  a cross-section through a pressure field generator of a first aspect of the present invention in the first state; 
           [0033]      FIG. 5  a cross-section through a pressure field generator of a first aspect of the present invention in the second state; 
           [0034]      FIG. 6  a cross-section through a pressure field generator of a first aspect of the present invention in the third state; 
           [0035]      FIG. 7  a cross-section through a pressure field generator of a second aspect of the present invention; 
           [0036]      FIG. 8  a cross-section through a pressure field generator of a third aspect of the present invention; 
           [0037]      FIG. 9  a cross-section through a pressure field generator of a fourth aspect of the present invention; 
           [0038]      FIGS. 10  a), b) and c) cross-sections through a pressure field generator of a fifth aspect of the present invention; 
           [0039]      FIG. 11  a partial cross-section through a second embodiment of the stimulation device according to the invention; 
           [0040]      FIGS. 12  a) to f) various bottom and side views of other aspects of a second chamber of the present invention; 
           [0041]      FIG. 13  a block diagram of an embodiment of the present invention; 
           [0042]      FIGS. 14  a) to c) Diagrams of various pressure modulation patterns of the present invention 
       
    
    
     DESCRIPTION OF PREFERRED EMBODIMENTS 
       [0043]    According to one embodiment, a pressure field generator in the stimulation device has at least one first chamber and at least one second chamber with at least one opening for placing on a body part or on the erogenous zone and at least one connection element that connects the first chamber with the second chamber. 
         [0044]    This embodiment of chambers communicating in a fluidic manner via at least one connection element allows the first chamber to simply generate a pressure field in the second chamber by modifying the volume in the first chamber, which is occasionally directed at the area of skin to be stimulated. 
         [0045]    A pressure field is a temporally modifiable field of media pressures, with occasional positive-pressures and occasional negative-pressures, a negative-pressure being a media pressure below the reference pressure and a positive-pressure being a media pressure above the reference pressure. 
         [0046]    The medium is usually gaseous, preferably air, but may alternatively or additively, for example, be a liquid medium, such as water or commercially available lubricant. For example, the chambers may be filled with the lubricant prior to using the stimulation device. This allows the corresponding area of skin to be stimulated with a suitable skin-friendly liquid in lieu of air as well, whatever the user&#39;s individual preference. As another example, the stimulation device may also be used under water with water as the medium (in the bathtub, for example). 
         [0047]    The reference pressure is usually the existing ambient pressure in relation to the stimulation device at the beginning of use (i.e. prior to placing the stimulation device on the area of skin to be stimulated). In the preferred use of the stimulation device with air, the reference pressure is the currently existing air pressure or normal pressure. 
         [0048]    The pressure field excites the blood circulation of the area of skin to be stimulated, while said area of skin is indirectly massaged, thus combining two advantageous effects. The increased blood circulation makes the erogenous zone of the person concerned more sensitive, while generating an additional massage effect that serves, for example, to stimulate the erogenous zone to sexual arousal up to climax. The massage effect is generated by the kinetic energy of the medium flowing out of the first chamber through the connection element against the surface of the area of skin to be stimulated. The massage effect generated in this way is indirect, i.e. without the area of skin to be stimulated being contacted by a solid body, such as a vibrator, which results in the avoidance of the initially explained disadvantages of direct stimulation. 
         [0049]    By the exemplary use of the temporally modifiable pressure field on the clitoris, the pressure field imitates a stimulation that usually only occurs during sexual intercourse. Likewise, the cohabitation movement generates a varying stimulus on the clitoris. It is thus a true-to-life imitation of the natural act of cohabitation, with medical statements confirming that the use of the pressure field causes neither habituation effects nor addiction. This is due in particular to the alternating use of negative- and positive-pressures (or even to the non-continuous use of only one type of pressure). 
         [0050]    Furthermore, the maximum applicable pressure is regularly limited by the maximum resilience of the area of skin to be stimulated. Thus, for instance, too high a negative-pressure harbors the risk of painful injury, especially in erogenous zones. Only stimulation devices working with negative-pressures are usually limited to this maximum in their mode of operation. Conversely, the combination of positive- and negative-pressures creates an extended working area of the stimulation-triggering pressure field or effect, as the working area of the pressure can now be exploited to the maximum in both the positive and negative area. 
         [0051]    The orientation of the at least one connection element towards the area of skin to be stimulated allows the pressure field to work directly, wherein the pressure field is decisively influenced by the configuration of the at least one connection element and of the at least one opening from the connection element into the second chamber, and is thus adjustable after every use of the stimulation device. Thus, for example, the at least one opening of the connection element may be located opposite and preferably directly opposite the body part to be stimulated. For example, the connection element in a stimulation device intended for the clitoris may have a single passageway with nozzle effect on the clitoris glans between the first and second chamber. Alternatively, the at least one connection element may consist of a plurality, for example four, of passageways between the chambers, if a larger area of skin is to be stimulated. 
         [0052]    Furthermore, after placing the halfway or partially opened second chamber on the area of skin to be stimulated, a self-contained system of media- and airflow is created in the pressure field generator. Thus, for instance, the medium or air is moved decisively backwards and forwards between the chambers, while an interchange with media or with air from outside the system being at least largely avoidable. Thus, the first chamber is preferably connected exclusively with the second chamber via or through the connection element. Thus, no first chamber connections other than those to the second chamber exist; for example, there is no direct first chamber connection to the environment of the device via a pressure valve or via an air discharge channel. 
         [0053]    For example, the air temperature in the flow system rapidly adjusts to the skin temperature, while the distracting supply of new (possibly cold) air from outside the system is avoided, as may be the case, inter alia, when using vacuum pumps in prior art. Drying effects are also avoided, as very little or no removal of stimulation-promoting fluid, such as bodily fluid, occurs in a closed system. 
         [0054]    Furthermore, due to the simple construction, the pressure field generator has the advantage of increased hygiene and improved cleanability. The pressure field generator thus avoids valves or pumps/compressors with potential dead spaces and places that cannot be cleaned. The pressure field generator is thus easy to clean. For example, the stimulation device can be simply cleaned by filling the first chamber with a cleaning agent and activating the pressure field. Alternatively, the second chamber can be arranged to be replaceable, which also simplifies the cleaning of both chambers. Furthermore, the chambers and the connection element of the pressure field generator can be designed in one-piece, wherein the latter consists of a single molded plastic part (e.g. rubber). 
         [0055]    In addition, the construction avoids complex fluidic elements, such as valves, which leads to a simplification in production. 
         [0056]    Furthermore, the stimulation device has a drive unit, which modifies the volume in the first chamber in such a way that a pressure field is generated via the connection element in the second chamber that serves to stimulate the erogenous zone, and has a control device that activates the drive unit. 
         [0057]    As a matter of principle, the medium transported between the chambers is limited to the maximum volume of the first chamber. In addition, the transported volume can be further constructively limited by the maximum possible volume modification caused by the drive unit. 
         [0058]    This means that the maximum positive- or negative-pressure the stimulation device can build up in the second chamber is limited due to the dimensioning of the components of the pressure field generator and of the drive. In particular, the maximum positive- or negative-pressure can be limited to degree that minimizes or excludes any risk of injury for the areas of skin to be stimulated. As a result, any conventional safety valve in prior art or any manual intervention in the stimulation process by the user, such as the opening of a release valve, is rendered unnecessary. 
         [0059]    Furthermore, the temporal modification of the pressure field or the modification of the pressure field by the control device is automatically controlled to a large extent. Thus, for example, the modulation of the pressure field, such as intensity, chronological sequence or evolvement, can be pre-saved in the control device. As a preference, the temporal modification of the pressure field can have a regular or reoccurring (stimulation) pattern, such as impulses with a stipulated cycle or regularly alternating impulse sequences. This allows the user&#39;s interaction with the stimulation device to be limited to switching on and off and selecting the stimulation pattern, while the stimulation device automatically executes the preferred stimulation pattern. Thus, the user complexity of the stimulation device is low, especially when compared with conventional (medical) vacuum stimulation devices. Alternatively, or additionally, the simulation pattern of the stimulation device can be individually configured by the user during or before operation. 
         [0060]    In one embodiment, a system includes the stimulation device and a remote control device. The remote control device is arranged separately from the stimulation device, wherein the control device of the stimulation device is remotely controlled by the remote control device. This allows a conventional wireless (via radio for example) or wired remote control to be employed, in order to allow the remote controlled moderation of the stimulation device or the activation thereof by another user. 
         [0061]    In one embodiment, a method for stimulating body parts, especially the clitoris, is disclosed. The associated advantages effects and impacts are explained in more detail above in relation to the pressure field. 
         [0062]    In one embodiment, the stimulation device is used as a sex toy for stimulating the female clitoris. As explained at the beginning, the female clitoris is an especially erogenous zone of women, which is why the use of an indirect massage combined with a negative-pressure-stimulation for this body part to provide stimulation up to orgasm seems particularly advantageous. 
         [0063]    With reference to  FIG. 1 , a front view of a first embodiment of stimulation device  1  is explained, wherein  FIG. 2  shows a perspective view and  FIG. 3  a cross-section of the first embodiment of stimulation device  1  according to one or more embodiments. 
         [0064]    The first embodiment of stimulation device  1  is a preferably electric or small device, comprising a housing  8 , a pressure field generator  2 , operating elements  71 , a display  72 , an on/off switch  74 , a socket  75 , an optional battery  76  and optional lighting  9 . 
         [0065]    Housing  8  is preferably designed so ergonomically that it can be held comfortably in one hand and has no sharp or pointed edges. Furthermore, housing  8  may consist of plastic, such as polycarbonate (PC) or acrylonitrile butadiene styrene (ABS). In addition, the gripping areas or even the entire housing may be supplemented by or designed in a haptically advantageous silicone. Housing  8  is preferably designed to be at least water-resistant or splash-proof, for example protection class IP  24 . 
         [0066]    Operating elements  71  are used to adjust the device operating mode, i.e. to adjust the pressure field modulation pattern. Operating elements  71  can, for example, be designed as at least one pushbutton, as at least one rotary switch, or as at least one touch-sensitive switch. Furthermore, operating elements  71  can produce an optical feedback for activating light emitting diodes (LED) integrated in the center of the switch, for example. 
         [0067]    An optional display  72  serves to inform the user of the device status and/or the setting status. Display  72  can for example be configured as a plurality of light diodes or as an LCD display. The displayed information can, for example, be the charge status of an optional battery or the current setting of the modulation pattern. 
         [0068]    On/off switch  74  is used for activating and deactivating stimulation device  1 . This on/off switch  74  can, for example, be a pushbutton, which switches stimulation device  1  on or off when held down, or a ratcheting slide switch. 
         [0069]    A socket  75  is used to supply the external power of stimulation device  1  via an external plug  73 , which is connected to an external power adapter, for example. To ensure stimulation device  1  is splash-proof, a magnetic-inductive transformer may be provided instead of the socket, which allows power to be transmitted to stimulation device  1  without any electroconductive contact. Stimulation device  1  preferably also has a battery, such as a nickel metal hydride battery (NiMH) for wireless operation. Alternatively, a (longer) power supply cable may also be led out of the stimulation device. 
         [0070]    Pressure field generator  2  of a first embodiment has a first chamber  3  in the interior of stimulation device  1 , a second chamber  4  for placing on a body part  11  to be stimulated, and a connection element  5 , which connects the first chamber  3  with the second chamber  4 . 
         [0071]    A drive unit  6 , such as an electric motor, drives the first chamber  3  via an axis  61  and by means of an eccentric  62  (or alternatively by means of a connecting rod) in such a way that the volume of the first chamber  3  is modified according to the rotation of axis  61  of drive unit  6 . It is hereby annotated that any drive types causing a deflection in wall  31  of the first chamber  3  for volume modification can basically be used in stimulation device  1 . The latter may, for example, occur hydraulically, pneumatically, piezoelectrically, mechanically or electromagnetically. Examples of this are described in more detail later on. 
         [0072]    A control device  7  activates drive unit  6 , operating elements  71  and display  72 . Control device  7  and drive unit  6  are supplied with power by internal battery  76  and/or external power supply  73 . 
         [0073]    Optional lighting  9  is provided on or in housing  8 . Lighting  9  is preferably used for lighting the interior of the second chamber  4 . Lighting  9  can either be switched by the user or automatically activated by activating stimulation device  1 . Furthermore, lighting  9  can be composed of energy-saving light diodes. The lighting can, for example, serve as an orientation aid in the dark for the user of stimulation device  1  or as additional optical stimulation. 
         [0074]    With reference to  FIGS. 4, 5 and 6 , the construction and function of a first aspect of pressure field generator  2  of stimulation device  1  is subsequently described in more detail. 
         [0075]      FIG. 4  shows pressure field generator  2  in a first state, with the second chamber  4  being placed on the area of skin or body part  11  to be stimulated. The first state of pressure field generator  2  is characterized by a neutral deflection of the first chamber  3 , i.e. no external force is exerted on the first chamber  3 , for example, by the drive unit. Here, volume V 1  of the first chamber is the standard volume of this chamber  3 . 
         [0076]    The body part  11  to be stimulated is an area of skin on the body, wherein for example an especially sensitive erogenous zone, clitoris  12 , is shown. The use of the stimulation device  1  is thus not limited to the female clitoris  11 , instead stimulation device  1  can be used on all body parts or erogenous zones (such as the inside of the upper thighs, the loins, neck, nipples, etc.), which can be stimulated by means of media- or air-pressure massage and/or negative-pressure. 
         [0077]    Due to being placed on the body part  11  to be stimulated, the second chamber  4  forms a chamber largely or completely sealed off from the exterior of pressure field generator  2 , which is only still connected to the second chamber via connection element  5 , wherein the edges of chamber  4  ideally form an air-tight bond with the surface of body part  11 . Two communicating chambers  3  and  4  are created in this way, wherein corresponding pressure equalization via connection element  5  ensues between chambers  3  and  4  in the event of a volume modification in one of chambers  3  or  4 . 
         [0078]    Wall  31  of the first chamber  3  is secured by means of a holder  32 . Holder  32  is in turn attached to housing  8 . Wall  41  of the second chamber is further affixed to holder  32 . Two mutually aligned openings in wall  41  of the second chamber and of holder  32  jointly form connection element  5 , which connects the first chamber  3  and the second chamber  5 . Wall  31 , holder  32  and wall  41  are preferably adhered to each other media- or air-tightly. Alternatively, the latter can also be press-fitted or screwed together with each other (for example by means of sealing areas between housing  8  and the respective part). Holder  32  can also be adhered or screwed onto housing  8 , for example. 
         [0079]    Wall  31  of the first chamber  3  preferably consists of a flexible media- or airtight material, such as rubber. Holder  32  preferably consists of a rigid plastic, which is just as media- and airtight. Wall  41  of the second chamber is preferably made of a flexible, skin-friendly material, such as silicone or rubber. 
         [0080]      FIG. 5  shows pressure field generator  2  of  FIG. 4  in a second state, wherein the second chamber  4  is in turn placed on the body part  11  to be stimulated. The second state is characterized in that a force A affecting the first chamber  3  causes chamber  3  to expand. In detail, force A in this embodiment draws wall  31  of the first chamber  3  in a direction facing away from the second chamber  4 . 
         [0081]    Volume V 2  in chamber  3  increases as a result, i.e., V 2 &gt;V 1 . To equalize the difference in pressure created between chambers  3  and  4 , the media or air now flows from the second chamber  4  into the first chamber  3 . 
         [0082]    Assuming that the first state of the present pressure in chambers  3  and  4  corresponds to the currently prevailing external reference pressure (air pressure for example); the present overall pressure in the second state will now be less than the external reference pressure. This negative-pressure is designed in such a way that it is preferably less than the usual systolic blood pressure in the blood vessels of body part  11 . The blood circulation in this area thus increases and clitoris  12  is better supplied with blood in the second state. 
         [0083]      FIG. 6  shows pressure field generator  2  in a third state, wherein the second chamber  4  is in turn placed on the body part  11  to be stimulated. The third state is characterized in that a force B influencing the first chamber  3  causes a volume reduction or compression in chamber  3 . In detail, the direction of force B is opposed to the direction of force A and distorts wall  31  of the first chamber in such a way that the resulting volume V 3  of the chamber is less than volume V 1 . The compression of chamber  3  causes a positive-pressure in chamber  3 , which is equalized by a media- or airflow through connection element  5  in the direction of the second chamber  4 . 
         [0084]    This media flow is now preferably directed by the orientation of opening  51  and/or of connection element  5  towards the body part  11  to be stimulated, in particular towards the glans of clitoris  12 . The indirect (pressure) massage ensues due to the medium flowing onto body part  11 . The size of opening  51  is dimensioned in such a way that it is small enough in ratio to the volume displaced in the first chamber  3  to sufficiently accelerate the medium for a perceptible massage effect. 
         [0085]    Furthermore, the type of flow can not only be advantageously influenced by the size and orientation of opening  51 , but also by the inner configuration of the connection element. For example, helix-shaped grooves in connection element  5  can cause the flow to swirl, wherein the flow profile of the flow unfurls a “softer” or more turbulent effect on the body part to be stimulated. Alternatively, the resulting pressure field in the second chamber  4  can be adjusted by means of a plurality of openings  51 , depending on use. 
         [0086]    The advantageous factor of the arrangement shown in  FIGS. 4 to 6  is that it is hygienically unproblematic (due to the avoidance of dead spaces, for example) and is simple to produce. For example, no valves or other openings in or on the first chamber  3  are required. 
         [0087]      FIG. 7  shows one embodiment of an alternative construction of pressure field generator  2 . Walls  31  and  41  of the first and second chambers  3  and  4  respectively can thus engage with one another in such a way that they also form two communicating chambers with a connection element  5 , as in the first aspect of the construction of pressure field generator  2 . Thus, the separate holder is no longer required, while the second chamber  4  is replaceable. In addition, connection element  5  can be designed integrally or in one-piece with wall  41  of the second chamber  4 . A replaceable chamber  4  has the advantage of allowing the use of any shapes of chamber  4  adjusted to the respective body part (a more detailed description thereof is provided later), without the entire stimulation device  1  needing to be replaced. Alternatively, the second chamber  4  can also be pluggably affixed to housing  8  (not shown in more detail). Wall  31  of the first chamber  3  can be adhered or screwed onto housing  8 , for example. 
         [0088]    Also, as shown in more detail in  FIG. 7  by the broken line and double arrow C, the first chamber  3  is expanded and compressed by a force exerted perpendicularly to the axial direction of connection element  5 . In principle, the force exerted directly or indirectly on the first chamber  3  by drive unit  5  can be exerted from any direction. The only decisive criterion here is that the volume of the first chamber  3  can be increased and decreased by drive unit  6 . 
         [0089]      FIG. 8  shows one embodiment of an integral or one-piece structure of pressure field generator  2 . An elastic material, such as silicone or rubber, can be used as material for chambers  3  and  4 . The advantage here is that any hygienically unsafe divide is avoided and the production effort is reduced. Pressure field generator  2  can be adhered or screwed onto housing  8  in this case too. Any modification of the volume in the first chamber  3  is analogous here, as described in conjunction with  FIG. 7 . 
         [0090]      FIG. 9  shows one embodiment of an alternative construction of pressure field generator  2 . The second chamber  4 , a plurality of connection elements  5 , as well as partial sections of wall  31  of the first chamber  3  are designed in one-piece. Alternatively, pressure field generator  2  can be constructed in two or more pieces from individual components, while safeguarding the geometrical example of  FIG. 9  in a similar way to that shown in  FIG. 4 or 7 . 
         [0091]    The volume in chamber  3  is modified in a similar way to a piston pump, although no valves are available here. A piston  63  is thus moved backwards and forwards by the drive unit, for example an electric motor or electromagnet, in the directions of the double arrow D. This type of drive has the advantage that the volume of the first chamber  3  can be simply reduced to zero or almost zero, thus allowing the first chamber  3  to be almost completely emptied. 
         [0092]    The embodiment of connection element  5 , with a plurality of channels  52  and openings  51 , leads to a distribution of the pressure field to a plurality of concentration points. While the embodiment of connection element  5  with only one channel, as described in conjunction with  FIG. 6 , leads to the formation of a strongly concentrated media- or airflow on a target area, the embodiment of connection element  5  shown in  FIG. 9  allows the media- or airflow to be distributed to a plurality of target areas, thus allowing clitoris  11  to be blown not just on its glans, but equally from a plurality of directions as well, for example. Depending on use, this distribution of the airflow concentration to a plurality of areas can help to avoid any overstimulation and/or help to increase the stimulation area. 
         [0093]      FIGS. 10 a  to 10 c    show (partial) cross-sections of one embodiment of a construction of pressure field generator  2  with a bending element  64  as drive for modifying the volume in the first chamber  3 . Bending element  64  can, for example, be a conventional piezoelectric bending element, which distorts or bends once voltage is applied. In this embodiment wall  31  of the first chamber  3  is a rigid or stiff construction, while bending element  64  is suitably dovetailed to the sides of the first chamber  3 . The transition points between bending element  64  and wall  31  are sealed (elastically bonded for example). The drive for pressure field generator  2  is already integrated in this construction and an external drive is not required. An electric motor with an eccentric is not needed, for example. This allows, inter alia, the reduction of any disturbing natural oscillations due to the eccentric movement of the stimulation device. 
         [0094]    In detail,  FIG. 10 a    shows pressure field generator  2  with bending element  64  in a neutral position. Thus, the volume of the first chamber  3  with bending element  64  in the neutral position is the standard volume.  FIG. 10 b    also shows the first chamber  3  with an excited and, consequently, outwardly bent bending element, while the volume of the first chamber  3  is increased, with a negative-pressure consequently prevailing in pressure field generator  2 .  FIG. 10 c    shows a bending element of the first chamber  3  excited in the opposite direction to  FIG. 10 b   , which is why the volume in the first chamber  3  has decreased, with an positive-pressure consequently prevailing in pressure field generator  2 . 
         [0095]      FIG. 11  shows one embodiment with a locally separated arrangement of chambers  3  and  4  of pressure field generator  2 . Chambers  3  and  4  are connected via an extended connection element  5 , which can be a longer flexible hose or even a rigid pipe. For example, connection element  5  may be 0.5 m in length. This enables housing  8  to be held in one hand, while the other hand holds the second chamber  4  on the body part  11  to be stimulated; or one can simply lay housing  8  aside, while the user holds only the second chamber  4  in his/her hands. The stimulation device in this embodiment can also be designed as a table device. 
         [0096]      FIGS. 12   a ) to  12   f ) show various bottom and side views of other aspects of the second chamber  4  in accordance with one or more embodiments. In detail,  FIG. 12   a ) shows a bottom view of a circular second chamber  4  with a centrally arranged opening  51 ;  FIG. 12   b ) a bottom view of a triangular second chamber  4  with a centrally arranged opening  51 ;  FIG. 12   c ) a bottom view of an oval second chamber  4  with a centrally arranged opening  51 ; and  FIG. 12   d ) a bottom view of an almost eight-shaped second chamber  4  with two openings  51  shifted to the center.  FIG. 12   e ) further shows a side cross-section of a second chamber  4 , wherein the second chamber  4  has an additional extended contact surface  43  to the skin or a support part  43  to improve the sealing function of the second chamber  4  on the skin. The extended contact surface  43  may also have grooves or projections that improve the sealing function even more.  FIG. 12   f ) shows a side cross-section of a second chamber  4  with a plurality of separate connection elements  5  and an extended contact surface due to support part  43 . 
         [0097]    In principle, the form of the second chamber  4  can thus be adjusted to the anatomy of the erogenous zone to be stimulated. The form of chamber  4  in  FIG. 12   a ) is, for example, adjusted to the round shape of the breast, while the form of chamber  4  in  FIG. 12   c ) is better suited to the form of the female vulva. Furthermore, the shape of the second chamber  4  also determines the characteristic of the pressure field. The size of the second chamber  4  in ratio the volume displaced from chamber  3  thus determines the amount of the achievable negative- or positive-pressure. Furthermore, the proximity of opening  51  of connection element  5  to the area of skin to be stimulated can also be used to determine the intensity of the massage effect on said area of skin. A plurality of openings  51 , cf.  FIG. 12   d ) allows the massage effect to be distributed to a plurality of areas. Thus, for example, the clitoris can be less directly stimulated at the very sensitive clitoris glans (cf.  FIG. 12   e ), and more stimulated at the areas surrounding the clitoris glans, in order to prevent overstimulation of the clitoris. 
         [0098]      FIG. 13  shows a block diagram of an example of the functional construction of an embodiment with a control device  7 , a drive unit  6 , lighting  9 , an on/off switch  74 , operating elements  71 , a battery  76  and an external power supply  73 . 
         [0099]    Control device  7 , which has a microcontroller or is hardwired, for example, initially controls the power supply of all users of stimulation device  1 , as well as an optional charging and discharging process of battery  76  and/or a battery management. In particular, control device  7  controls the excitation of drive unit  6 , such as the size of the deflection, the frequency, the modulation, etc. 
         [0100]    Furthermore, control device  7  may have a memory in which at least one modulation or stimulation pattern (described in more detail in conjunction with  FIG. 14   a ) to  c )) is saved. The excitation of drive unit  6  can now be activated via operating elements  71  in compliance with the previously saved stimulation pattern at the discretion of the user of stimulation device  1 . The stimulation pattern of the pressure field can also be optionally and individually adjusted and saved by the user via the operating elements. 
         [0101]      FIG. 14   a ) shows the chronological sequence of a total pressure p in the pressure field generator ( 2 ) when using the latter for stimulation. The broken line provides the reference pressure, such as the currently prevailing atmospheric pressure that exists outside the pressure field generator ( 2 ). If the second chamber  4  is now placed on body part  11  to be stimulated, the originally prevailing ambient pressure in the pressure field generator ( 2 ) is maintained, for example. It is now assumed that the second chamber  4  is sealed tightly to the body part to be stimulated for the most part. Once the stimulation device is activated, drive unit  6  is activated or excited by control device  7  according to a previously saved stimulation pattern. Accordingly, the volume of the first chamber  3  and thus the total pressure in pressure field generator  2  are modified, with the pressure modifications being modified to the reference pressure. The pressure or stimulation pattern shown as an example in  FIG. 14   a ) develops a pulsed, regular pressure field. In phases of pressure increase, the erogenous zone to be stimulated is blown on or massaged, while in the times when a negative-pressure prevails, the blood circulation of body part  11 , the clitoris for example, is promoted. Thus, time periods exist (designated in  FIG. 14   a ) as I)) in which a negative-pressure prevails, while the clitoris is simultaneously indirectly massaged. 
         [0102]      FIG. 14   b ) shows three examples of alternative stimulation patterns. Thus, the area designated as II) shows a pulsed stimulation pattern with high amplitude. The area designated as III) shows a pulsed stimulation pattern with low amplitude. Furthermore, the area designated as IV) illustrates an irregular and asymmetrical stimulation pattern as regards chronological sequence and amplitude. The patterns can be varied according to individual bodily effect/use and according to individual wishes. 
         [0103]      FIG. 14   c ) shows another example of an alternative stimulation pattern. The strength of pressure may, for example, increase with time, in order to adjust to the user&#39;s state of excitement. 
         [0104]    In addition to the explained embodiments, other basic design principles are allowed. For example, different arrangements or constructions of the first chamber  3  may be arbitrarily combined with various embodiments of the second chamber  5  or connection element  5 . For example, the first chamber  3  with the drive in  FIG. 10  can be combined with the second chamber in  FIG. 12   f ). 
         [0105]    Although only one first chamber  3  is shown in all embodiments, two or more first chambers  3  may be present, which are then appropriately activated simultaneously or time-delayed in such a way that their volume is modified in order to build up a pressure field. 
         [0106]    Although only one opening from the first chamber  3  to connection element  5  is shown in all embodiments, a plurality of openings for a connection element  5  or even more openings for a plurality of connection elements  5  may be present in the first chamber  3 . 
         [0107]    A stimulation device  1  can have a plurality of pressure field generator  2 . Thus, for example, two pressure field generators may be available to stimulate two erogenous zones simultaneously. 
         [0108]    The stimulation patterns can deviate from the patterns shows in  FIG. 14   a ),  b ) and  c ), as long as they have a chronological sequence of over- and negative-pressures. For example, a relatively long-lasting negative-pressure can initially be built up at the beginning or after activation of the device (3 minutes for example), in order to effectively increase the blood circulation of the zone to be stimulated, whereupon pulsed negative- and over-pressures of a slowly increasing amplitude then follow. 
       LIST OF REFERENCE NUMERALS 
       [0000]    
       
         
           
               1  Stimulation device 
               2  Pressure field generator 
               3  First chamber 
               4  Second chamber 
               5  Connection element 
               6  Drive unit 
               7  Control device 
               8  Housing 
               9  Lighting 
               11  Body part 
               12  Clitoris 
               31  Wall of first chamber 
               32  Holder 
               41  Wall of second chamber 
               42  Opening of second chamber 
               43  Contact surface 
               51  Opening of connection element to second chamber 
               61  Drive shaft 
               62  Eccentric 
               63  Piston 
               64  Bending element 
               71  Operating element 
               72  Display 
               73  Power supply 
               74  On/off switch 
               75  Socket 
               76  Battery 
               77  Control board